linux中的回收站机制，防止rm -rf 事件

下文中的配置文件：config.txt
mkdir -p ~/.trash
alias rm=del
del()
{
mv $@ ~/.trash/
if [ $? -ne 0 ];then
echo -e "33[31mPlease refer to the error:33[0m mv is rm alias. Please use command:33[31m rm filename 33[0m or 33[31m rm dirname 33[0m. The deleted item will be moved to33[31m ~/.trash33[0m To delete directly, Please use command:33[31m/bin/rm -rf filename 33[0m or 33[31m /bin/rm -rf dirname 33[0m"
fi
}
cleardel()
{
read -p"clear sure? [Input 'y' or 'Y' to confirm. Input 'n' to cancel]" confirm
[ $confirm == 'y' ] || [ $confirm == 'Y' ] && /bin/rm -rf ~/.trash/*
}

########################################################################################
原理：就是将rm 别名到了mv中，只要是rm 删除的都移动到宿主目录中的统一目录下。
#############这个文件是脚本文件，基本上不用修改，除非你的用户家目录没有设置在/home/目录中。
#!/bin/bash
# User:四道风
# Email:1092335851@qq.com
# Date: 201907
echo -e "33[31m请根据提示来设置是否需要将用户配置回收站33[0m"
echo -e "33[31m请按提示输入，请勿输入其他字符，否则脚本将自动退出33[0m"
echo -e "33[31m配置完成后，如使回收站生效，请断开当前连接,重新连接（重新加载环境变量）33[0m"
#列出系统可登陆用户
users=`grep /bin/bash /etc/passwd | awk -F ":" '{print $1}' > ./user.txt`
for U in `cat ./user.txt`
do
read -p "user is $U ,please input yes/YES or no/NO : " input
if [[ $input == 'yes' || $input == 'YES' ]];then
if [[ $U == 'root' ]];then
grep "^del()" /root/.bashrc > /dev/null 2>&1
if [ $? -eq 0 ];then
echo -e "33[31m/root/.bashrc33[0m .The del function already exists.Trach already exists.Automatic jump out"
continue
fi
if [ $? -eq 0 ];then
sed -i "s/alias rm='rm -i'/#alias rm='rm -i'/" /root/.bashrc > /dev/null 2>&1 && cat ./config.txt >> /root/.bashrc && echo "A recycle bin has been set up,The relogin will take effect! ! ! " && source /root/.bashrc
else
echo "/root/.bashrc is not:(alisa rm='rm -i')"
egrep -v '^$|^#' /root/.bashrc > /root/.bashrc > /dev/null 2>&1
cat ./config.txt >> /root/.bashrc && echo "A recycle bin has been set up,The relogin will take effect! ! ! " && source /root/.bashrc
fi
else
grep "^del()" /home/$U/.bashrc > /dev/null 2>&1
if [ $? -eq 0 ];then
echo -e "33[31m/home/$U/.bashrc33[0m .The del function already existsi.Trach already exists .Automatic jump out"
continue
fi
#mkdir -p /home/$U/.trash
if [ $? -eq 0 ];then
sed -i "s/alias rm='rm -i'/#alias rm='rm -i'/" /home/$U/.bashrc > /dev/null 2>&1 && cat ./config.txt >> /home/$U/.bashrc && echo "A recycle bin has been set up,The relogin will take effect! ! ! " && source /home/$U/.bashrc
else
echo "$U is not (alias rm='rm -i')"
egrep -v '^$|^#' /home/$U/.bashrc > /home/$U/.bashrc > /dev/null 2>&1
cat ./config.txt >> /home/$U/.bashrc && echo "A recycle bin has been set up,The relogin will take effect ! ! ! " && source /home/$U/.bashrc
fi
fi
elif
[[ $input == 'no' || $input == 'NO' ]];then
continue
else
echo -e "Please enter 33[31m[ no | NO | yes | YES ]33[0m please do not enter other, otherwise it will exit the script directly."
break
fi

done