Linux上使用rm很危险，刚刚不小心删除了一个还有用的文件。因此我们可以把rm指令替换为mv，执行后把要删除的文件保留到一个目录下，定期清理就好了。
把下面的代码粘贴到你的.bashrc或。zshrc下。注意root下的也要粘贴。
# for rm {{
# mkdir ~/.delete, when rm somethings ,mv them to here
if [ ! -d $HOME/.delete ]
then
mkdir $HOME/.delete
fi
unDoRm() {
mv -i $HOME/.delete/$@ ./
}
toBackup()
{
for thing in $@
do
echo $thing | grep '^-' > /dev/null
if [ ! $? = 0 ]
then
mv $thing $HOME/.delete
echo mv $thing to ~/.delete, you can backup them
fi
done
}
cleanDelete()
{
echo 'clear backup files?[y/N]'
read confirm
[ $confirm = 'y' ] || [ $confirm = 'Y' ] && /usr/bin/rm -rf $HOME/.delete/*
}
# rm somethings
alias rm=toBackup
# see what in~/.delete now
alias lsdel='ls $HOME/.delete'
# undo
alias unrm=unDoRm
# clean ~/.delete
alias cleandel=cleanDelete
# }}