Commands commonly used in Linux operations

I. Shortcuts commonly used in the shell

Shortcut keys in the man interface:

？ Keyword up search keyword keyword,n down search, n continue search up

/keyword down search keywords keyword,n continue search down, n search

Q Exit man page

Ii. directives

1. Shutdown restart or shutdown

Shutdown is a command to safely shut down or restart the Linux system, the system will notify all logged-in users before shutting down, the system is about to shut down, at this time all new users can not log in, and shutdown functions similar to the command and Init, Halt, Poweroff, Reboot

shutdown [Options] [ time ] [ warning message ]

Time: Specify the time when the system shuts down! The example of time is explained below. If you do not have this item, the default 1 automatically after a minute .

Time:

[Email protected] ~]# shutdown-h now

Immediately shuts down, where now is equivalent to a state of 0 time

[Email protected] ~]# shutdown-h 20:25

System in today's 20:25 session shutdown, if the command is issued at 21:25, the genius shut down the machine

[Email protected] ~]# shutdown-h +10

The system automatically shuts down after ten minutes

reboot, Shutdown: reboot, Halt, Poweroff

[[Email protected] ~]# sync; Sync Sync Reboot

[[email protected] ~]# Halt # System Stop ~ screen may keep messages that the system has stopped!

[[email protected] ~]# Poweroff # system shuts down, so no extra power is provided, the screen is blank!

warning Message:

Use with the-K parameter

2. Shutdown and restart command: Halt/poweroff/reboot

These instructions are similar to the shutdown above

A common set of shutdown, restart, and logoff commands under Linux:

3. pwd

Displays the absolute path of the current working directory

Format: pwd [options]

4. CD: Switch directory

5. Tree

Display the contents of a directory in a tree-shaped structure

6, MkDir

Create a directory,

By default, if the directory you want to create already exists, then LJ will prompt that the file exists I and will not continue to create the directory

Usage:

mkdir [OPTION] ... DIRECTORY ...

7. Touch

Create an empty file or change the timestamp property of a file

The touch command has two functions: one is to create a new empty file, and the other is to change the timestamp property of the existing file.

Knowledge Supplement:

8, LS

Display content and related property information in the directory

Commands commonly used in Linux operations