linux 防误删机制脚本

1.1 背景介绍

linux系统下，经常有运维或者开发误删除，所以写了个脚本，防止误删除操作
简单思路就是创建个隐藏文件夹，用mv脚本替换rm命令

2.1 脚本详情

  cat <<'EOF_INSTALL' > /usr/bin/rm_safely.sh #!/bin/bash # Created: Zhaoping.lu, 2021.12  # Purpose:  # A replacement for rm command. Will move the target files into ~/.trash/trash_<time_flag> instead rm.  # And the trash folders elder than specified days will be pruged.  # Changes # V1, 20211222, Created.  KEEP_DAYS=7    #文件保留天数 TRASH_BASE_DIR=$HOME/.trash  function usage() { cat <<EOF2022 Usage: rm FILE... Move files into $TRASH_BASE_DIR instead of deleting them.  EOF2022 exit 0 } [[ -z $@ || $@ == -h || $@ == --help ]] && usage  CURR_TRASH_DIR=$TRASH_BASE_DIR/trash_$(date +%Y%m%d_%H%M%S.%N) mkdir -p $CURR_TRASH_DIR [[ $? -ne 0 ]] && Failed to create trash folder:$CURR_TRASH_DIR. Check disk free space. Quit. && exit 1  MV=/usr/bin/mv RM=/usr/bin/rm  # process input arguments, skip command options TARGETS= for FNAME in $@; do 	if [[ ! $FNAME =~ ^- ]]; then 		TARGETS=$TARGETS $FNAME 	fi done  $MV $TARGETS $CURR_TRASH_DIR  # clean trash files older than specified days function delete_elder_than_days() { DAYS=$1 TM_FLAG=$(date +%Y%m%d_%H%M%S.%N -d $DAYS days ago)  find $TRASH_BASE_DIR -mindepth 1 -maxdepth 1 -name trash_* | awk -v rm_cmd=$RM -v trash_base_dir=$TRASH_BASE_DIR -v tm_flag=$TM_FLAG '{if ($0 < trash_base_dir/trash_tm_flag && $0 ~ /trash_/) {system(rm_cmd -rf \$0\);} }' }   delete_elder_than_days $KEEP_DAYS  EOF_INSTALL  chown root:root /usr/bin/rm_safely.sh chmod 755 /usr/bin/rm_safely.sh echo alias rm='/usr/bin/rm_safely.sh' >> /etc/bashrc echo <Done>

3.1 脚本部署

脚本特点：

将“rm”设置为rm-safely.sh的别名
执行rm时，实际上是将文件移动到了$HOME/.trash目录下，同时自动清理超期文件
不具备restore命令，需要恢复文件时，直接到$HOME/.trash下找回文件即可

#创建文件/usr/bin/rm_safely.sh  chown root:root /usr/bin/rm_safely.sh chmod 755 /usr/bin/rm_safely.sh  #仅对bash有效。使用其它shell时，则需要在相应的profile里添加此别名 echo alias rm='/usr/bin/rm_safely.sh' >> /etc/bashrc