Basic Commands

The grep command is useful for locating a specified string in a file. For example, if you want to find every place in the Sneakers.txt file that mentions "coffee," You can type: grep coffee sneakers.txt You will see each row with "coffee" in the file.

You can use the Head command to see the beginning of a file. This command is: Head <filehttp://www.aliyun.com/zixun/aggregation/11696.html ' >name> Head is a useful command, but since it is limited to the first few lines of the file, You can't see how long the file actually is. By default, you can only read the first 10 lines of the file. You can change the number of rows to display by specifying a number option ...

The clear command clears the terminal window. Cat is a shorthand for concatenate (chain), meaning merging files. This command can display the contents of a file (often used with more), or combine multiple files into one file.

cd command to change the working directory. For example: the command function CD ~ will send you back to your login directory CD/Take you to the root directory of the entire system cd/root take you to the root user's home directory; You must be a root user to access the directory Cd/home take you to the home directory where the user's login directory is usually stored on CD. Move up one level directory Cd/dir1/subdirfoo no matter which directory you are in, this absolute path will take you directly to Subdirfo ...