linux防止误删操作，起别名
编辑进入.bashrc，将底下代码块粘贴到.bashrc下，wq!, source ,此时测试下命令，分为trash=rm ,cleartrash=rm -rf 还行
trash命令执行后可以在home 目录下找到.trash文件夹，进入.trash目录就会找到刚才所删掉的文件。其实该代码块就是定义了rm相当于mv 的操作，从而起到误删除的作用。
###redefinition rm command###
TRASH_DIR="/home/.trash"
if [ ! -x $TRASH_DIR ];then
mkdir -p $TRASH_DIR
fi
alias rm=trash
alias rl='ls $TRASH_DIR'
alias unrm=restorefile
alias restore=restorefile
#restore file
restorefile()
{
mv -i /home/.trash/[email protected] ./
}
#delete file
trash()
{
mv [email protected] $TRASH_DIR/
}
#delete trash
cleartrash()
{
#read -p "Do you really want to delete it?[y/n]" confirm
#[ $confirm == 'y' ] || [ $confirm == 'Y' ] && /bin/rm -rf $TRASH_DIR/*
/bin/rm -rf $TRASH_DIR/*
}