Linux使用别名alias将rm命令替换为mv避免误删除

Posted 2022-06-30 白-胖-子

alias别名rm

• rm杀伤力太大
• 用alias将rm替换为mv

将删除的文件移动至/tmp文件夹下以删除时间命名的文件夹中

## 设定目标文件夹为DIR=/tmp/rm`date +%F%T
## 删除前先建立文件夹 mkdir $DIR
## 执行rm命令时相当于执行了mv -t $DIR
[03:27:51 root@C8-3-55 ~]#alias rm='DIR=/tmp/rm`date +%F%T`;mkdir $DIR;mv -t $DIR'

[03:31:23 root@C8-3-55 ~]#touch a..c1..3.txt;ls *.txt
123456.txt  2.txt     a2.txt  a5.txt  b3.txt  c1.txt  c4.txt  f2.txt      passWord.txt
123.txt     奈曼.txt  a3.txt  b1.txt  b4.txt  c2.txt  c5.txt  name.txt    PWD.txt
1.txt       a1.txt    a4.txt  b2.txt  b5.txt  c3.txt  f1.txt  passwd.txt  username.txt
[03:31:34 root@C8-3-55 ~]#rm [a..c][1..5].txt
[03:32:36 root@C8-3-55 ~]#ls *.txt
123456.txt  1.txt  奈曼.txt  a3.txt  b1.txt  b3.txt  b5.txt  c3.txt  f1.txt  name.txt    passWord.txt  username.txt
123.txt     2.txt  a2.txt    a4.txt  b2.txt  b4.txt  c2.txt  c4.txt  f2.txt  passwd.txt  PWD.txt
[03:32:45 root@C8-3-55 ~]#rm a..c*.txt
[03:33:19 root@C8-3-55 ~]#ls *.txt
123456.txt  123.txt  1.txt  2.txt  奈曼.txt  f1.txt  f2.txt  name.txt  passwd.txt  passWord.txt  PWD.txt  username.txt
[03:33:31 root@C8-3-55 ~]#ls /tmp/rm2021-03-2503\\:3
rm2021-03-2503:32:36/ rm2021-03-2503:33:19/
[03:33:31 root@C8-3-55 ~]#ls /tmp/rm2021-03-2503\\:32\\:36/
a1.txt  a5.txt  c1.txt  c5.txt
[03:34:19 root@C8-3-55 ~]#ls /tmp/rm2021-03-2503\\:33\\:19/
a2.txt  a3.txt  a4.txt  b1.txt  b2.txt  b3.txt  b4.txt  b5.txt  c2.txt  c3.txt  c4.txt

• 此操作中利用了mv -t 的特性
  mv -t 可以将原文件和目标目录进行对调，从而实现将标准输入的内容可以执行

mv [选项]... -t 目录 源文件...
-t, --target-directory=DIRECTORY  move all SOURCE arguments into DIRECTORY

永久保存别名

将alias写进 .bashrc目录中

[03:59:13 root@C8-3-55 ~]#vim .bashrc
[04:00:41 root@C8-3-55 ~]#cat .bashrc
# .bashrc

# User specific aliases and functions

#alias rm='rm -i'
alias rm='DIR=/tmp/rm`date +%F%T`;mkdir $DIR;mv -t $DIR'
alias cp='cp -i'
alias mv='mv -i'
alias cip='cat /etc/sysconfig/network-scripts/ifcfg-ens33'
alias yi='yum -y install'
# Source global definitions
if [ -f /etc/bashrc ]; then
        . /etc/bashrc
fi