命令别名设置

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nianxiongdi123@ubuntu:~$ alias cls='clear' 设置别名
nianxiongdi123@ubuntu:~$ cls

nianxiongdi123@ubuntu:~$ alias dir='ls -l'
nianxiongdi123@ubuntu:~$ dir
total 56
drwxr-xr-x 3 nianxiongdi123 nianxiongdi123 4096 Mar 8 21:29 Desktop
drwxr-xr-x 2 nianxiongdi123 nianxiongdi123 4096 Mar 6 22:54 Documents
drwxr-xr-x 2 nianxiongdi123 nianxiongdi123 4096 Mar 7 23:23 Downloads
drwxrwxr-x 4 nianxiongdi123 nianxiongdi123 4096 Mar 7 23:32 eclipse-workspace
-rw-r--r-- 1 nianxiongdi123 nianxiongdi123 8980 Mar 6 21:23 examples.desktop
drwxr-xr-x 8 nianxiongdi123 nianxiongdi123 4096 Dec 19 16:24 jdk1.8.0_161
drwxr-xr-x 2 nianxiongdi123 nianxiongdi123 4096 Mar 6 22:54 Music
drwxr-xr-x 2 nianxiongdi123 nianxiongdi123 4096 Mar 6 22:54 Pictures
drwxr-xr-x 2 nianxiongdi123 nianxiongdi123 4096 Mar 6 22:54 Public
drwxr-xr-x 2 nianxiongdi123 nianxiongdi123 4096 Mar 6 22:54 Templates
drwxr-xr-x 2 nianxiongdi123 nianxiongdi123 4096 Mar 6 22:54 Videos
drwxrwxr-x 6 nianxiongdi123 nianxiongdi123 4096 Mar 8 00:18 work
nianxiongdi123@ubuntu:~$ aliaf lm='ls -l | more'
aliaf: command not found
nianxiongdi123@ubuntu:~$ alias lm='ls -l | more'
nianxiongdi123@ubuntu:~$ lm
total 56
drwxr-xr-x 3 nianxiongdi123 nianxiongdi123 4096 Mar 8 21:29 Desktop
drwxr-xr-x 2 nianxiongdi123 nianxiongdi123 4096 Mar 6 22:54 Documents
drwxr-xr-x 2 nianxiongdi123 nianxiongdi123 4096 Mar 7 23:23 Downloads
drwxrwxr-x 4 nianxiongdi123 nianxiongdi123 4096 Mar 7 23:32 eclipse-workspace
-rw-r--r-- 1 nianxiongdi123 nianxiongdi123 8980 Mar 6 21:23 examples.desktop
drwxr-xr-x 8 nianxiongdi123 nianxiongdi123 4096 Dec 19 16:24 jdk1.8.0_161
drwxr-xr-x 2 nianxiongdi123 nianxiongdi123 4096 Mar 6 22:54 Music
drwxr-xr-x 2 nianxiongdi123 nianxiongdi123 4096 Mar 6 22:54 Pictures
drwxr-xr-x 2 nianxiongdi123 nianxiongdi123 4096 Mar 6 22:54 Public
drwxr-xr-x 2 nianxiongdi123 nianxiongdi123 4096 Mar 6 22:54 Templates
drwxr-xr-x 2 nianxiongdi123 nianxiongdi123 4096 Mar 6 22:54 Videos
drwxrwxr-x 6 nianxiongdi123 nianxiongdi123 4096 Mar 8 00:18 work
nianxiongdi123@ubuntu:~$ unalias lm 取消别名
nianxiongdi123@ubuntu:~$ lm
lm: command not found