> specify a comma-separated list of archives to be unarchived on the compute machines The general command line syntax is: command [genericOptions] [commandOptions] (三)常用命令操作 (0)启动 Hadoop 集群(方便后续的测试) 代码语言:
The general command line syntax is bin/hadoop command [genericOptions] [commandOptions] 1、文件准备 在服务器本地创建 data.txt 文件用于测试,文件的内容如下所示: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 hello hadoop 2、-appendToFile 将服务器本地的文件追加到HDFS指定的文件中,如果多次运行...
cluster -libjars <jar1,...> specify a comma-separated list of jar files to be included in the classpath -archives <archive1,...> specify a comma-separated list of archives to be unarchived on the compute machines The general command line syntax is: command [genericOptions] [commandOptions...
The general command line syntax is bin/hadoop command [genericOptions] [commandOptions] [hadoop@acadgild ~]$ AI代码助手复制代码
[root@h133 ~]# hadoop fs -cp /user/yuanyong/test/new.file /user [root@h133 ~]# hadoop fs -cat /user/new.file this is append info. 1. 2. 3. 12、-mv:从hdfs的一个路径移动到hdfs的另一个路径,和-cp使用方式一致。 我们不难发现,很多命令都是基于linux命令上的在封装,甚至功能一模一样,...
The general command line syntax is: command [genericOptions] [commandOptions] -ls : 查看指定路径信息 查看hdfs目录下的内容。 [root@bigdata01 ~]# hdfs dfs -ls /Found 4 items -rw-r--r-- 1 root supergroup 150569 2021-03-27 14:49 /LICENSE.txt ...
The general command line syntax is: command [genericOptions] [commandOptions] 查看我们的HDFS目录信息-ls,发现失败,启动我们的hadoop集群 [shaozhiqi@hadoop102 hadoop-3.1.2]$ hadoop fs -lsls: Call From hadoop102/192.168.1.102to hadoop102:9000failed on connection exception: java.net.ConnectException: ...
@Testpublic void testCopyToLocalFile() throws IOException,InterruptedException,URISyntaxException{// 1 获取文件系统Configuration configuration = new Configuration();FileSystem fs = FileSystem.get(new URI("hdfs://bigdata:9000"), configuration, "atguigu");// 2 执行下载操作// boolean delSrc 指是否将...
The general command line syntax is bin/hadoop command [genericOptions] [commandOptions] 4.获取完全命令信息 Usage: hadoop fs [generic options] [-appendToFile <localsrc> ... <dst>] [-cat [-ignoreCrc] <src> ...] [-checksum <src> ...] [-chgrp [-R] GROUP PATH...] [-chmod [-R...
The general command line syntax is bin/hadoop command [genericOptions] [commandOptions] [yinzhengjie@s101 ~]$ 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. ...