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