Create a folder / file command and clear mode
mkdir + folder name
touch + file name
-fr delete files, folders rm -f forcibly remove -r is recursive
Under linux query all started threads: PS -ef | grep the Java
Hadoop under the log file logs the content, (located /opt/bigdata/hadoop-3.2.1/logs/hadoop-hadoop-namenode-node1.log),
Use More hadoop-hadoop-the NameNode-node1.log open file information. Press the space bar to turn pages.
less hadoop-hadoop-the NameNode-node1.log open file information, according to a forward and backward flip, press q to exit.
Details Note:
1) How to withdraw from the ping linux? Ctrl + Z
2) Hadoop2.x default port number: http://192.168.200.11:50070
3) Hadoop3.x default port number: http://192.168.200.11:9870
4) linux install Desktop words, how to start the desktop: startx
rwx are the value of 421 755 = r_x 777 = rwx For details, please check the official documentation.