Shell Common shortcut keys

I. Historical order

　　 History #查看历史命令

　　history-c #清空历史命令

　　history-w #不等退出, write the history command in the cache directly to the history command to save the file ~/.bash_history

　　vim/etc/profile #默认历史命令保存1000条, can be modified histsize save the number of bars (unlimited), the command is saved in the ~/.bash_history file

Invocation of the history command:

1. Up and DOWN ARROW calls

2.!n #执行行号为n行的命令, the command shown in history displays the respective line number

3.!his #执行最后一条以his开头的命令

Command and file completion: Tab

Two. aliases and shortcut keys

　　alias VI = "VIM" #定义别名, temporary effect

　　alias #查看所有别名

Command execution order:

First-bit execution of commands executed with absolute or relative paths

Second cis-execute alias

Third-level execution of bash internal commands

The first command found in the directory lookup order defined by the $PATH environment variable; echo $PATH; you can see the path of a series of commands, the reason why the system command does not use the path, because the environment variable is set, automatically look for.

To permanently save aliases:

The user edits the . BASHRC file in the home directory and writes alias Vi= ' Vim '.

Vim/root/.bashrc

Vim/home/.bashrc

To delete an alias:

　　Unalias VI # Unalias aliases

Bash common shortcut keys:

　　Ctrl + C Abort command

　　Ctrl + L Clear Screen

　　Ctrl + U Delete or cut the cursor before the command

Ctrl + K Delete or cut the contents after the cursor

　　Ctrl + y Paste Ctrl + U or CTRL + K cut content

CTRL + R searches through the history command, and when you press CTRL + R, the search interface appears, and the search will be searched from the history command as soon as you enter the content.

　　Ctrl + D exits the current terminal (equivalent to exit)

Shell Common shortcut keys