Shell Learning Overview and examples

Shell

1) is a scripting language used on the Linux operating system, providing interfaces for user interaction with the system, similar to the command prompt in Windows, but more powerful;

2) can be executed by the command line, or it can be edited as a script file;

3) mainly for automation simple system or software operation task;

4) Easy to configure, maintain and transplant, do not fancy execution efficiency;

5) The generic Shell is a bash (GNU Bourne-again Shell) in the GNU Toolset, which is installed by default in/bin/bash and can be used to view the bash version number:/bin/bash--version

Examples:

Open the terminal (shortcut key: ctrl+alt+t) under the Linux system and enter this command (list shorthand) to view the files in the current directory:

Ls-al

Where LS is the command,-al is the parameter;

If you only enter LS, you can only get all the folder information in the current directory;

Plus the-al parameter, you get all the folder and file information.

Shell Learning Overview and examples