Redhat Linux Command Encyclopedia

A. Start, shutdown, login, log out related commands

<login> Login

<logout> Log Out

<exit> Log Out

<shutdown> Stop System

<reboot> reboot

<poweroff> Power off

<sync> write the contents of memory to disk

<lilo> Install Lilo startup management Program

<grub> Install Lilo startup management Program

Two. Shell-related commands

<chsh> Switch Shell

<alias> set Command alias

<unalias> Cancel Command Alias

<which> Show where the command is located

<type> Query Command type

<echo> display string or variable contents

<set> set/Show Shell variables

<printenv> Display Environment variables

<export> Setting Environment variables

<env> Setting TEMP Environment variables

<unset> Releasing environment variables

<setenv> Setting Environment variables

<unsetenv> Releasing environment variables

<source> implementation of the order in the document

<man> Search Command Manual

<info> Query Hypertext Command Manual

Introduction to <whatis> Display commands

<apropos> Search Manual by keyword

Three. User Management related commands

<su> Switch to another user

<useradd> Additional users

<adduser> Additional users

<userdel> Delete Users

<usermod> Modify user Settings

<chfn> Modify user's personal information

<groupadd> Append Group

<groupdel> Delete Group

<groupmod> Modify Group settings