每天一个Linux指令--alias和unalias

1 alias 
2 alias l=‘ls -l‘ 
3 alias rm=‘rm -i‘  
4 ... 
5 alias vi=‘vim‘

1 alias l 
2 alias l=‘ls -l‘

1 pwd 
2 /home/wzl 
3 alias cdlog=‘cd /home/wzl/log/`date +%Y%m%d`/BUP‘ 
4 cdlog 
5 pwd 
6 /home/wzl/log/20200707/BUP

1 cd log/bap 
2 vi 20200707.log(输入11122345，保存) 
3 cd - 
4 alias logMsg=‘cd log;cd bap;vi 20200707.log‘ 
5 logMsg 
6 11122345（显示）

1 unalias logMsg 
2 logMsg 
3 -bash: logMsg: command not found

1 vi .bashrc 
2 logM=‘cd log/bap;vi 20200707.log‘ （插入 .bashrc）
3 logM 
4 -bash: logMsg: command not found 
5 source .bashrc 
6 logM 
7 11122345