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225 | </div> |
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226 | <h1>HDFS File System Shell Guide</h1> |
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227 | <div id="minitoc-area"> |
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228 | <ul class="minitoc"> |
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229 | <li> |
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230 | <a href="#Overview">Overview</a> |
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231 | <ul class="minitoc"> |
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232 | <li> |
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233 | <a href="#cat"> cat </a> |
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234 | </li> |
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235 | <li> |
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236 | <a href="#chgrp"> chgrp </a> |
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237 | </li> |
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238 | <li> |
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239 | <a href="#chmod"> chmod </a> |
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240 | </li> |
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241 | <li> |
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242 | <a href="#chown"> chown </a> |
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243 | </li> |
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244 | <li> |
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245 | <a href="#copyFromLocal">copyFromLocal</a> |
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246 | </li> |
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247 | <li> |
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248 | <a href="#copyToLocal"> copyToLocal</a> |
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249 | </li> |
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250 | <li> |
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251 | <a href="#count"> count </a> |
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252 | </li> |
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253 | <li> |
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254 | <a href="#cp"> cp </a> |
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255 | </li> |
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256 | <li> |
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257 | <a href="#du">du</a> |
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258 | </li> |
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259 | <li> |
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260 | <a href="#dus"> dus </a> |
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261 | </li> |
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262 | <li> |
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263 | <a href="#expunge"> expunge </a> |
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264 | </li> |
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265 | <li> |
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266 | <a href="#get"> get </a> |
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267 | </li> |
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268 | <li> |
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269 | <a href="#getmerge"> getmerge </a> |
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270 | </li> |
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271 | <li> |
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272 | <a href="#ls">ls</a> |
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273 | </li> |
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274 | <li> |
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275 | <a href="#lsr">lsr</a> |
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276 | </li> |
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277 | <li> |
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278 | <a href="#mkdir"> mkdir </a> |
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279 | </li> |
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280 | <li> |
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281 | <a href="#moveFromLocal"> moveFromLocal </a> |
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282 | </li> |
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283 | <li> |
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284 | <a href="#moveToLocal"> moveToLocal</a> |
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285 | </li> |
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286 | <li> |
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287 | <a href="#mv"> mv </a> |
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288 | </li> |
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289 | <li> |
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290 | <a href="#put"> put </a> |
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291 | </li> |
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292 | <li> |
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293 | <a href="#rm"> rm </a> |
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294 | </li> |
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295 | <li> |
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296 | <a href="#rmr"> rmr </a> |
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297 | </li> |
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298 | <li> |
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299 | <a href="#setrep"> setrep </a> |
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300 | </li> |
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301 | <li> |
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302 | <a href="#stat"> stat </a> |
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303 | </li> |
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304 | <li> |
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305 | <a href="#tail"> tail </a> |
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306 | </li> |
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307 | <li> |
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308 | <a href="#test"> test </a> |
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309 | </li> |
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310 | <li> |
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311 | <a href="#text"> text </a> |
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312 | </li> |
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313 | <li> |
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314 | <a href="#touchz"> touchz </a> |
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315 | </li> |
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316 | </ul> |
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317 | </li> |
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318 | </ul> |
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319 | </div> |
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320 | |
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321 | <a name="N1000D"></a><a name="Overview"></a> |
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322 | <h2 class="h3">Overview</h2> |
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323 | <div class="section"> |
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324 | <p> |
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325 | The FileSystem (FS) shell is invoked by |
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326 | <span class="codefrag">bin/hadoop fs <args></span>. |
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327 | All FS shell commands take path URIs as arguments. The URI |
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328 | format is <em>scheme://autority/path</em>. For HDFS the scheme |
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329 | is <em>hdfs</em>, and for the local filesystem the scheme |
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330 | is <em>file</em>. The scheme and authority are optional. If not |
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331 | specified, the default scheme specified in the configuration is |
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332 | used. An HDFS file or directory such as <em>/parent/child</em> |
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333 | can be specified as <em>hdfs://namenodehost/parent/child</em> or |
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334 | simply as <em>/parent/child</em> (given that your configuration |
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335 | is set to point to <em>hdfs://namenodehost</em>). Most of the |
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336 | commands in FS shell behave like corresponding Unix |
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337 | commands. Differences are described with each of the |
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338 | commands. Error information is sent to <em>stderr</em> and the |
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339 | output is sent to <em>stdout</em>. |
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340 | </p> |
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341 | <a name="N10034"></a><a name="cat"></a> |
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342 | <h3 class="h4"> cat </h3> |
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343 | <p> |
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344 | |
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345 | <span class="codefrag">Usage: hadoop fs -cat URI [URI …]</span> |
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346 | |
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347 | </p> |
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348 | <p> |
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349 | Copies source paths to <em>stdout</em>. |
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350 | </p> |
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351 | <p>Example:</p> |
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352 | <ul> |
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353 | |
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354 | <li> |
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355 | |
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356 | <span class="codefrag"> hadoop fs -cat hdfs://nn1.example.com/file1 hdfs://nn2.example.com/file2 |
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357 | </span> |
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358 | |
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359 | </li> |
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360 | |
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361 | <li> |
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362 | |
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363 | <span class="codefrag">hadoop fs -cat file:///file3 /user/hadoop/file4 </span> |
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364 | |
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365 | </li> |
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366 | |
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367 | </ul> |
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368 | <p>Exit Code:<br> |
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369 | |
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370 | <span class="codefrag"> Returns 0 on success and -1 on error. </span> |
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371 | </p> |
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372 | <a name="N10060"></a><a name="chgrp"></a> |
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373 | <h3 class="h4"> chgrp </h3> |
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374 | <p> |
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375 | |
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376 | <span class="codefrag">Usage: hadoop fs -chgrp [-R] GROUP URI [URI …]</span> |
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377 | |
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378 | </p> |
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379 | <p> |
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380 | Change group association of files. With <span class="codefrag">-R</span>, make the change recursively through the directory structure. The user must be the owner of files, or else a super-user. Additional information is in the <a href="hdfs_permissions_guide.html">HDFS Admin Guide: Permissions</a>. |
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381 | </p> |
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382 | <a name="N10077"></a><a name="chmod"></a> |
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383 | <h3 class="h4"> chmod </h3> |
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384 | <p> |
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385 | |
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386 | <span class="codefrag">Usage: hadoop fs -chmod [-R] <MODE[,MODE]... | OCTALMODE> URI [URI …]</span> |
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387 | |
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388 | </p> |
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389 | <p> |
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390 | Change the permissions of files. With <span class="codefrag">-R</span>, make the change recursively through the directory structure. The user must be the owner of the file, or else a super-user. Additional information is in the <a href="hdfs_permissions_guide.html">HDFS Admin Guide: Permissions</a>. |
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391 | </p> |
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392 | <a name="N1008E"></a><a name="chown"></a> |
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393 | <h3 class="h4"> chown </h3> |
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394 | <p> |
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395 | |
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396 | <span class="codefrag">Usage: hadoop fs -chown [-R] [OWNER][:[GROUP]] URI [URI ]</span> |
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397 | |
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398 | </p> |
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399 | <p> |
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400 | Change the owner of files. With <span class="codefrag">-R</span>, make the change recursively through the directory structure. The user must be a super-user. Additional information is in the <a href="hdfs_permissions_guide.html">HDFS Admin Guide: Permissions</a>. |
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401 | </p> |
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402 | <a name="N100A5"></a><a name="copyFromLocal"></a> |
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403 | <h3 class="h4">copyFromLocal</h3> |
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404 | <p> |
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405 | |
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406 | <span class="codefrag">Usage: hadoop fs -copyFromLocal <localsrc> URI</span> |
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407 | |
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408 | </p> |
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409 | <p>Similar to <a href="#put"><strong>put</strong></a> command, except that the source is restricted to a local file reference. </p> |
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410 | <a name="N100BA"></a><a name="copyToLocal"></a> |
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411 | <h3 class="h4"> copyToLocal</h3> |
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412 | <p> |
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413 | |
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414 | <span class="codefrag">Usage: hadoop fs -copyToLocal [-ignorecrc] [-crc] URI <localdst></span> |
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415 | |
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416 | </p> |
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417 | <p> Similar to <a href="#get"><strong>get</strong></a> command, except that the destination is restricted to a local file reference.</p> |
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418 | <a name="N100CF"></a><a name="count"></a> |
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419 | <h3 class="h4"> count </h3> |
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420 | <p> |
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421 | |
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422 | <span class="codefrag">Usage: hadoop fs -count [-q] <paths></span> |
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423 | |
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424 | </p> |
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425 | <p> |
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426 | Count the number of directories, files and bytes under the paths that match the specified file pattern. The output columns are:<br> |
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427 | <span class="codefrag">DIR_COUNT, FILE_COUNT, CONTENT_SIZE FILE_NAME</span>. <br> |
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428 | <br>The output columns with <span class="codefrag">-q</span> are:<br> |
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429 | <span class="codefrag">QUOTA, REMAINING_QUATA, SPACE_QUOTA, REMAINING_SPACE_QUOTA, DIR_COUNT, FILE_COUNT, CONTENT_SIZE, FILE_NAME</span>. |
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430 | </p> |
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431 | <p>Example:</p> |
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432 | <ul> |
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433 | |
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434 | <li> |
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435 | |
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436 | <span class="codefrag"> hadoop fs -count hdfs://nn1.example.com/file1 hdfs://nn2.example.com/file2 |
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437 | </span> |
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438 | |
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439 | </li> |
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440 | |
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441 | <li> |
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442 | |
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443 | <span class="codefrag"> hadoop fs -count -q hdfs://nn1.example.com/file1 |
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444 | </span> |
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445 | |
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446 | </li> |
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447 | |
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448 | </ul> |
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449 | <p>Exit Code:</p> |
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450 | <p> |
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451 | |
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452 | <span class="codefrag"> Returns 0 on success and -1 on error.</span> |
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453 | |
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454 | </p> |
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455 | <a name="N10108"></a><a name="cp"></a> |
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456 | <h3 class="h4"> cp </h3> |
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457 | <p> |
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458 | |
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459 | <span class="codefrag">Usage: hadoop fs -cp URI [URI …] <dest></span> |
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460 | |
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461 | </p> |
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462 | <p> |
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463 | Copy files from source to destination. This command allows multiple sources as well in which case the destination must be a directory. |
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464 | <br> |
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465 | Example:</p> |
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466 | <ul> |
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467 | |
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468 | <li> |
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469 | |
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470 | <span class="codefrag"> hadoop fs -cp /user/hadoop/file1 /user/hadoop/file2</span> |
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471 | |
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472 | </li> |
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473 | |
---|
474 | <li> |
---|
475 | |
---|
476 | <span class="codefrag"> hadoop fs -cp /user/hadoop/file1 /user/hadoop/file2 /user/hadoop/dir </span> |
---|
477 | |
---|
478 | </li> |
---|
479 | |
---|
480 | </ul> |
---|
481 | <p>Exit Code:</p> |
---|
482 | <p> |
---|
483 | |
---|
484 | <span class="codefrag"> Returns 0 on success and -1 on error.</span> |
---|
485 | |
---|
486 | </p> |
---|
487 | <a name="N10132"></a><a name="du"></a> |
---|
488 | <h3 class="h4">du</h3> |
---|
489 | <p> |
---|
490 | |
---|
491 | <span class="codefrag">Usage: hadoop fs -du URI [URI …]</span> |
---|
492 | |
---|
493 | </p> |
---|
494 | <p> |
---|
495 | Displays aggregate length of files contained in the directory or the length of a file in case its just a file.<br> |
---|
496 | Example:<br> |
---|
497 | <span class="codefrag">hadoop fs -du /user/hadoop/dir1 /user/hadoop/file1 hdfs://nn.example.com/user/hadoop/dir1</span> |
---|
498 | <br> |
---|
499 | Exit Code:<br> |
---|
500 | <span class="codefrag"> Returns 0 on success and -1 on error. </span> |
---|
501 | <br> |
---|
502 | </p> |
---|
503 | <a name="N1014D"></a><a name="dus"></a> |
---|
504 | <h3 class="h4"> dus </h3> |
---|
505 | <p> |
---|
506 | |
---|
507 | <span class="codefrag">Usage: hadoop fs -dus <args></span> |
---|
508 | |
---|
509 | </p> |
---|
510 | <p> |
---|
511 | Displays a summary of file lengths. |
---|
512 | </p> |
---|
513 | <a name="N1015D"></a><a name="expunge"></a> |
---|
514 | <h3 class="h4"> expunge </h3> |
---|
515 | <p> |
---|
516 | |
---|
517 | <span class="codefrag">Usage: hadoop fs -expunge</span> |
---|
518 | |
---|
519 | </p> |
---|
520 | <p>Empty the Trash. Refer to <a href="hdfs_design.html">HDFS Architecture</a> for more information on Trash feature. |
---|
521 | </p> |
---|
522 | <a name="N10171"></a><a name="get"></a> |
---|
523 | <h3 class="h4"> get </h3> |
---|
524 | <p> |
---|
525 | |
---|
526 | <span class="codefrag">Usage: hadoop fs -get [-ignorecrc] [-crc] <src> <localdst></span> |
---|
527 | |
---|
528 | <br> |
---|
529 | |
---|
530 | </p> |
---|
531 | <p> |
---|
532 | Copy files to the local file system. Files that fail the CRC check may be copied with the |
---|
533 | <span class="codefrag">-ignorecrc</span> option. Files and CRCs may be copied using the |
---|
534 | <span class="codefrag">-crc</span> option. |
---|
535 | </p> |
---|
536 | <p>Example:</p> |
---|
537 | <ul> |
---|
538 | |
---|
539 | <li> |
---|
540 | |
---|
541 | <span class="codefrag"> hadoop fs -get /user/hadoop/file localfile </span> |
---|
542 | |
---|
543 | </li> |
---|
544 | |
---|
545 | <li> |
---|
546 | |
---|
547 | <span class="codefrag"> hadoop fs -get hdfs://nn.example.com/user/hadoop/file localfile</span> |
---|
548 | |
---|
549 | </li> |
---|
550 | |
---|
551 | </ul> |
---|
552 | <p>Exit Code:</p> |
---|
553 | <p> |
---|
554 | |
---|
555 | <span class="codefrag"> Returns 0 on success and -1 on error. </span> |
---|
556 | |
---|
557 | </p> |
---|
558 | <a name="N101A4"></a><a name="getmerge"></a> |
---|
559 | <h3 class="h4"> getmerge </h3> |
---|
560 | <p> |
---|
561 | |
---|
562 | <span class="codefrag">Usage: hadoop fs -getmerge <src> <localdst> [addnl]</span> |
---|
563 | |
---|
564 | </p> |
---|
565 | <p> |
---|
566 | Takes a source directory and a destination file as input and concatenates files in src into the destination local file. Optionally <span class="codefrag">addnl</span> can be set to enable adding a newline character at the end of each file. |
---|
567 | </p> |
---|
568 | <a name="N101B7"></a><a name="ls"></a> |
---|
569 | <h3 class="h4">ls</h3> |
---|
570 | <p> |
---|
571 | |
---|
572 | <span class="codefrag">Usage: hadoop fs -ls <args></span> |
---|
573 | |
---|
574 | </p> |
---|
575 | <p>For a file returns stat on the file with the following format:</p> |
---|
576 | <p> |
---|
577 | |
---|
578 | <span class="codefrag">permissions number_of_replicas userid groupid filesize modification_date modification_time filename</span> |
---|
579 | |
---|
580 | </p> |
---|
581 | <p>For a directory it returns list of its direct children as in unix.A directory is listed as:</p> |
---|
582 | <p> |
---|
583 | |
---|
584 | <span class="codefrag">permissions userid groupid modification_date modification_time dirname</span> |
---|
585 | |
---|
586 | </p> |
---|
587 | <p>Example:</p> |
---|
588 | <p> |
---|
589 | |
---|
590 | <span class="codefrag">hadoop fs -ls /user/hadoop/file1 </span> |
---|
591 | |
---|
592 | </p> |
---|
593 | <p>Exit Code:</p> |
---|
594 | <p> |
---|
595 | |
---|
596 | <span class="codefrag">Returns 0 on success and -1 on error.</span> |
---|
597 | |
---|
598 | </p> |
---|
599 | <a name="N101E8"></a><a name="lsr"></a> |
---|
600 | <h3 class="h4">lsr</h3> |
---|
601 | <p> |
---|
602 | <span class="codefrag">Usage: hadoop fs -lsr <args></span> |
---|
603 | <br> |
---|
604 | Recursive version of <span class="codefrag">ls</span>. Similar to Unix <span class="codefrag">ls -R</span>. |
---|
605 | </p> |
---|
606 | <a name="N101FB"></a><a name="mkdir"></a> |
---|
607 | <h3 class="h4"> mkdir </h3> |
---|
608 | <p> |
---|
609 | |
---|
610 | <span class="codefrag">Usage: hadoop fs -mkdir <paths></span> |
---|
611 | |
---|
612 | <br> |
---|
613 | |
---|
614 | </p> |
---|
615 | <p> |
---|
616 | Takes path uri's as argument and creates directories. The behavior is much like unix mkdir -p creating parent directories along the path. |
---|
617 | </p> |
---|
618 | <p>Example:</p> |
---|
619 | <ul> |
---|
620 | |
---|
621 | <li> |
---|
622 | |
---|
623 | <span class="codefrag">hadoop fs -mkdir /user/hadoop/dir1 /user/hadoop/dir2 </span> |
---|
624 | |
---|
625 | </li> |
---|
626 | |
---|
627 | <li> |
---|
628 | |
---|
629 | <span class="codefrag">hadoop fs -mkdir hdfs://nn1.example.com/user/hadoop/dir hdfs://nn2.example.com/user/hadoop/dir |
---|
630 | </span> |
---|
631 | |
---|
632 | </li> |
---|
633 | |
---|
634 | </ul> |
---|
635 | <p>Exit Code:</p> |
---|
636 | <p> |
---|
637 | |
---|
638 | <span class="codefrag">Returns 0 on success and -1 on error.</span> |
---|
639 | |
---|
640 | </p> |
---|
641 | <a name="N10228"></a><a name="moveFromLocal"></a> |
---|
642 | <h3 class="h4"> moveFromLocal </h3> |
---|
643 | <p> |
---|
644 | |
---|
645 | <span class="codefrag">Usage: dfs -moveFromLocal <localsrc> <dst></span> |
---|
646 | |
---|
647 | </p> |
---|
648 | <p>Similar to <a href="#put"><strong>put</strong></a> command, except that the source <span class="codefrag">localsrc</span> is deleted after it's copied. </p> |
---|
649 | <a name="N10240"></a><a name="moveToLocal"></a> |
---|
650 | <h3 class="h4"> moveToLocal</h3> |
---|
651 | <p> |
---|
652 | |
---|
653 | <span class="codefrag">Usage: hadoop fs -moveToLocal [-crc] <src> <dst></span> |
---|
654 | |
---|
655 | </p> |
---|
656 | <p>Displays a "Not implemented yet" message.</p> |
---|
657 | <a name="N10250"></a><a name="mv"></a> |
---|
658 | <h3 class="h4"> mv </h3> |
---|
659 | <p> |
---|
660 | |
---|
661 | <span class="codefrag">Usage: hadoop fs -mv URI [URI …] <dest></span> |
---|
662 | |
---|
663 | </p> |
---|
664 | <p> |
---|
665 | Moves files from source to destination. This command allows multiple sources as well in which case the destination needs to be a directory. Moving files across filesystems is not permitted. |
---|
666 | <br> |
---|
667 | Example: |
---|
668 | </p> |
---|
669 | <ul> |
---|
670 | |
---|
671 | <li> |
---|
672 | |
---|
673 | <span class="codefrag"> hadoop fs -mv /user/hadoop/file1 /user/hadoop/file2</span> |
---|
674 | |
---|
675 | </li> |
---|
676 | |
---|
677 | <li> |
---|
678 | |
---|
679 | <span class="codefrag"> hadoop fs -mv hdfs://nn.example.com/file1 hdfs://nn.example.com/file2 hdfs://nn.example.com/file3 hdfs://nn.example.com/dir1</span> |
---|
680 | |
---|
681 | </li> |
---|
682 | |
---|
683 | </ul> |
---|
684 | <p>Exit Code:</p> |
---|
685 | <p> |
---|
686 | |
---|
687 | <span class="codefrag"> Returns 0 on success and -1 on error.</span> |
---|
688 | |
---|
689 | </p> |
---|
690 | <a name="N1027A"></a><a name="put"></a> |
---|
691 | <h3 class="h4"> put </h3> |
---|
692 | <p> |
---|
693 | |
---|
694 | <span class="codefrag">Usage: hadoop fs -put <localsrc> ... <dst></span> |
---|
695 | |
---|
696 | </p> |
---|
697 | <p>Copy single src, or multiple srcs from local file system to the destination filesystem. Also reads input from stdin and writes to destination filesystem.<br> |
---|
698 | |
---|
699 | </p> |
---|
700 | <ul> |
---|
701 | |
---|
702 | <li> |
---|
703 | |
---|
704 | <span class="codefrag"> hadoop fs -put localfile /user/hadoop/hadoopfile</span> |
---|
705 | |
---|
706 | </li> |
---|
707 | |
---|
708 | <li> |
---|
709 | |
---|
710 | <span class="codefrag"> hadoop fs -put localfile1 localfile2 /user/hadoop/hadoopdir</span> |
---|
711 | |
---|
712 | </li> |
---|
713 | |
---|
714 | <li> |
---|
715 | |
---|
716 | <span class="codefrag"> hadoop fs -put localfile hdfs://nn.example.com/hadoop/hadoopfile</span> |
---|
717 | |
---|
718 | </li> |
---|
719 | |
---|
720 | <li> |
---|
721 | <span class="codefrag">hadoop fs -put - hdfs://nn.example.com/hadoop/hadoopfile</span> |
---|
722 | <br>Reads the input from stdin.</li> |
---|
723 | |
---|
724 | </ul> |
---|
725 | <p>Exit Code:</p> |
---|
726 | <p> |
---|
727 | |
---|
728 | <span class="codefrag"> Returns 0 on success and -1 on error. </span> |
---|
729 | |
---|
730 | </p> |
---|
731 | <a name="N102B0"></a><a name="rm"></a> |
---|
732 | <h3 class="h4"> rm </h3> |
---|
733 | <p> |
---|
734 | |
---|
735 | <span class="codefrag">Usage: hadoop fs -rm [-skipTrash] URI [URI …] </span> |
---|
736 | |
---|
737 | </p> |
---|
738 | <p> |
---|
739 | Delete files specified as args. Only deletes non empty directory and files. If the <span class="codefrag">-skipTrash</span> option |
---|
740 | is specified, the trash, if enabled, will be bypassed and the specified file(s) deleted immediately. This can be |
---|
741 | useful when it is necessary to delete files from an over-quota directory. |
---|
742 | Refer to rmr for recursive deletes.<br> |
---|
743 | Example: |
---|
744 | </p> |
---|
745 | <ul> |
---|
746 | |
---|
747 | <li> |
---|
748 | |
---|
749 | <span class="codefrag"> hadoop fs -rm hdfs://nn.example.com/file /user/hadoop/emptydir </span> |
---|
750 | |
---|
751 | </li> |
---|
752 | |
---|
753 | </ul> |
---|
754 | <p>Exit Code:</p> |
---|
755 | <p> |
---|
756 | |
---|
757 | <span class="codefrag"> Returns 0 on success and -1 on error.</span> |
---|
758 | |
---|
759 | </p> |
---|
760 | <a name="N102D7"></a><a name="rmr"></a> |
---|
761 | <h3 class="h4"> rmr </h3> |
---|
762 | <p> |
---|
763 | |
---|
764 | <span class="codefrag">Usage: hadoop fs -rmr [-skipTrash] URI [URI …]</span> |
---|
765 | |
---|
766 | </p> |
---|
767 | <p>Recursive version of delete. If the <span class="codefrag">-skipTrash</span> option |
---|
768 | is specified, the trash, if enabled, will be bypassed and the specified file(s) deleted immediately. This can be |
---|
769 | useful when it is necessary to delete files from an over-quota directory.<br> |
---|
770 | |
---|
771 | Example: |
---|
772 | </p> |
---|
773 | <ul> |
---|
774 | |
---|
775 | <li> |
---|
776 | |
---|
777 | <span class="codefrag"> hadoop fs -rmr /user/hadoop/dir </span> |
---|
778 | |
---|
779 | </li> |
---|
780 | |
---|
781 | <li> |
---|
782 | |
---|
783 | <span class="codefrag"> hadoop fs -rmr hdfs://nn.example.com/user/hadoop/dir </span> |
---|
784 | |
---|
785 | </li> |
---|
786 | |
---|
787 | </ul> |
---|
788 | <p>Exit Code:</p> |
---|
789 | <p> |
---|
790 | |
---|
791 | <span class="codefrag"> Returns 0 on success and -1 on error. </span> |
---|
792 | |
---|
793 | </p> |
---|
794 | <a name="N10304"></a><a name="setrep"></a> |
---|
795 | <h3 class="h4"> setrep </h3> |
---|
796 | <p> |
---|
797 | |
---|
798 | <span class="codefrag">Usage: hadoop fs -setrep [-R] <path></span> |
---|
799 | |
---|
800 | </p> |
---|
801 | <p> |
---|
802 | Changes the replication factor of a file. -R option is for recursively increasing the replication factor of files within a directory. |
---|
803 | </p> |
---|
804 | <p>Example:</p> |
---|
805 | <ul> |
---|
806 | |
---|
807 | <li> |
---|
808 | |
---|
809 | <span class="codefrag"> hadoop fs -setrep -w 3 -R /user/hadoop/dir1 </span> |
---|
810 | |
---|
811 | </li> |
---|
812 | |
---|
813 | </ul> |
---|
814 | <p>Exit Code:</p> |
---|
815 | <p> |
---|
816 | |
---|
817 | <span class="codefrag">Returns 0 on success and -1 on error. </span> |
---|
818 | |
---|
819 | </p> |
---|
820 | <a name="N10329"></a><a name="stat"></a> |
---|
821 | <h3 class="h4"> stat </h3> |
---|
822 | <p> |
---|
823 | |
---|
824 | <span class="codefrag">Usage: hadoop fs -stat URI [URI …]</span> |
---|
825 | |
---|
826 | </p> |
---|
827 | <p> |
---|
828 | Returns the stat information on the path. |
---|
829 | </p> |
---|
830 | <p>Example:</p> |
---|
831 | <ul> |
---|
832 | |
---|
833 | <li> |
---|
834 | |
---|
835 | <span class="codefrag"> hadoop fs -stat path </span> |
---|
836 | |
---|
837 | </li> |
---|
838 | |
---|
839 | </ul> |
---|
840 | <p>Exit Code:<br> |
---|
841 | |
---|
842 | <span class="codefrag"> Returns 0 on success and -1 on error.</span> |
---|
843 | </p> |
---|
844 | <a name="N1034C"></a><a name="tail"></a> |
---|
845 | <h3 class="h4"> tail </h3> |
---|
846 | <p> |
---|
847 | |
---|
848 | <span class="codefrag">Usage: hadoop fs -tail [-f] URI </span> |
---|
849 | |
---|
850 | </p> |
---|
851 | <p> |
---|
852 | Displays last kilobyte of the file to stdout. -f option can be used as in Unix. |
---|
853 | </p> |
---|
854 | <p>Example:</p> |
---|
855 | <ul> |
---|
856 | |
---|
857 | <li> |
---|
858 | |
---|
859 | <span class="codefrag"> hadoop fs -tail pathname </span> |
---|
860 | |
---|
861 | </li> |
---|
862 | |
---|
863 | </ul> |
---|
864 | <p>Exit Code: <br> |
---|
865 | |
---|
866 | <span class="codefrag"> Returns 0 on success and -1 on error.</span> |
---|
867 | </p> |
---|
868 | <a name="N1036F"></a><a name="test"></a> |
---|
869 | <h3 class="h4"> test </h3> |
---|
870 | <p> |
---|
871 | |
---|
872 | <span class="codefrag">Usage: hadoop fs -test -[ezd] URI</span> |
---|
873 | |
---|
874 | </p> |
---|
875 | <p> |
---|
876 | Options: <br> |
---|
877 | -e check to see if the file exists. Return 0 if true. <br> |
---|
878 | -z check to see if the file is zero length. Return 0 if true. <br> |
---|
879 | -d check to see if the path is directory. Return 0 if true. <br> |
---|
880 | </p> |
---|
881 | <p>Example:</p> |
---|
882 | <ul> |
---|
883 | |
---|
884 | <li> |
---|
885 | |
---|
886 | <span class="codefrag"> hadoop fs -test -e filename </span> |
---|
887 | |
---|
888 | </li> |
---|
889 | |
---|
890 | </ul> |
---|
891 | <a name="N10392"></a><a name="text"></a> |
---|
892 | <h3 class="h4"> text </h3> |
---|
893 | <p> |
---|
894 | |
---|
895 | <span class="codefrag">Usage: hadoop fs -text <src></span> |
---|
896 | |
---|
897 | <br> |
---|
898 | |
---|
899 | </p> |
---|
900 | <p> |
---|
901 | Takes a source file and outputs the file in text format. The allowed formats are zip and TextRecordInputStream. |
---|
902 | </p> |
---|
903 | <a name="N103A4"></a><a name="touchz"></a> |
---|
904 | <h3 class="h4"> touchz </h3> |
---|
905 | <p> |
---|
906 | |
---|
907 | <span class="codefrag">Usage: hadoop fs -touchz URI [URI …]</span> |
---|
908 | |
---|
909 | <br> |
---|
910 | |
---|
911 | </p> |
---|
912 | <p> |
---|
913 | Create a file of zero length. |
---|
914 | </p> |
---|
915 | <p>Example:</p> |
---|
916 | <ul> |
---|
917 | |
---|
918 | <li> |
---|
919 | |
---|
920 | <span class="codefrag"> hadoop -touchz pathname </span> |
---|
921 | |
---|
922 | </li> |
---|
923 | |
---|
924 | </ul> |
---|
925 | <p>Exit Code:<br> |
---|
926 | |
---|
927 | <span class="codefrag"> Returns 0 on success and -1 on error.</span> |
---|
928 | </p> |
---|
929 | </div> |
---|
930 | |
---|
931 | </div> |
---|
932 | <!--+ |
---|
933 | |end content |
---|
934 | +--> |
---|
935 | <div class="clearboth"> </div> |
---|
936 | </div> |
---|
937 | <div id="footer"> |
---|
938 | <!--+ |
---|
939 | |start bottomstrip |
---|
940 | +--> |
---|
941 | <div class="lastmodified"> |
---|
942 | <script type="text/javascript"><!-- |
---|
943 | document.write("Last Published: " + document.lastModified); |
---|
944 | // --></script> |
---|
945 | </div> |
---|
946 | <div class="copyright"> |
---|
947 | Copyright © |
---|
948 | 2008 <a href="http://www.apache.org/licenses/">The Apache Software Foundation.</a> |
---|
949 | </div> |
---|
950 | <!--+ |
---|
951 | |end bottomstrip |
---|
952 | +--> |
---|
953 | </div> |
---|
954 | </body> |
---|
955 | </html> |
---|