#!/bin/bash #Function:Automatically backup a given list of directories  #or files, and can retain the N day backup files. #Can be back to the directory specified by the remote host, # but the need for free password login to the remote host #This script contains two files:Executable file "backup.sh" and # backup project file "bakfile.lst" ,two files must be in the same directory #Author:JianJie #Date:2016/8/26 #Usage: sh backup.sh & #Version:v2 ############################################################### LOG_FILE=/backup/local/log/`date +"%Y-%m"`.log #Log file LOG_DIR=/backup/local/log DATE_FORMAT=`date +"%Y-%m-%d"`                      BAK_FILE_LST=bakfile.lst       #Need to backup the file or directory to this file BAK_DIR=/backup/local          #Backup directory KEEP_DAYS=5                    #File retention days REMOTE_HOST=""                #Split between multiple hosts with ':' REMOTE_DIR=/backup/$HOSTNAME  #Remote host backup directory CURRENT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"  #The directory where the current script is running FORMAT="tar.gz"  #The compression format can be:tar.xz,tar.gz,tar.bz2 ############################################################### if [ "$REMOTE_HOST" != "" ];then   #Determine whether there is a backup directory on the remote host   ssh -t -q -n "$REMOTE_HOST" "[ ! -d "$REMOTE_DIR" ] && mkdir -p "$REMOTE_DIR"" fi #Determine whether log directory and log file exists if [ ! -d $LOG_DIR ];then   mkdir -p $LOG_DIR   touch $LOG_FILE else   if [ ! -e $LOG_FILE ];then   touch $LOG_FILE   fi fi #LogStart echo "Backup start at $(date +"%Y-%m-%d %H:%M:%S")" >> $LOG_FILE echo "--------------------------------------------------------" >> $LOG_FILE echo " " >> $LOG_FILE #Determine whether the file list 'bakfile.lst' exists if [ ! -e $CURRENT_DIR/$BAK_FILE_LST ];then   echo "Error:Important file [$CURRENT_DIR/$BAK_FILE_LST] has been lost,now creating..." >> $LOG_FILE   touch $CURRENT_DIR/$BAK_FILE_LST   echo "The file [$CURRENT_DIR/$BAK_FILE_LST] has been created,but you still need to write data in it!" >> $LOG_FILE   echo " " >> $LOG_FILE   echo "--------------------------------------------------------" >> $LOG_FILE   echo "Backup end at $(date +"%Y-%m-%d %H:%M:%S")" >> $LOG_FILE   echo " " >> $LOG_FILE   exit 3 fi for BACK_FILE in $(cat $CURRENT_DIR/$BAK_FILE_LST)   do       BASE_NAME=`echo "$BACK_FILE" | xargs basename`     OLD_FILE=$BAK_DIR/$BASE_NAME.$(date --date="$KEEP_DAYS days ago" +"%Y-%m-%d").$FORMAT     if [ -e "$BACK_FILE" ];then       cd $(dirname $BACK_FILE)  #If a backup file already exists, it will no longer be backed up       if [ -f $BAK_DIR/$BASE_NAME.$DATE_FORMAT.$FORMAT ];then         echo "Backup file [$BAK_DIR/$BASE_NAME.$DATE_FORMAT.$FORMAT] already exists!" >> $LOG_FILE       else         cp -RHpf $BASE_NAME $BAK_DIR         cd  $BAK_DIR         case $FORMAT in         tar.xz)           tar -cpJf $BASE_NAME.$DATE_FORMAT.$FORMAT $BASE_NAME ;;         tar.gz)           tar -cpzf $BASE_NAME.$DATE_FORMAT.$FORMAT $BASE_NAME ;;         tar.bz2)           tar -cpjf $BASE_NAME.$DATE_FORMAT.$FORMAT $BASE_NAME ;;         *)           echo "Compress FORMAT error,default compression FORMAT:tar.gz" >> $LOG_FILE           tar -cpzf $BASE_NAME.$DATE_FORMAT.tar.gz $BASE_NAME ;;         esac       #Backup files back to the remote host via scp         if [ "$REMOTE_HOST" != "" ];then           for host in $(echo "$REMOTE_HOST" | sed 's/:/ /g')             do               scp -o ConnectTimeout=10 $BASE_NAME.$DATE_FORMAT.$FORMAT $host:$REMOTE_DIR >>$LOG_FILE 2>/dev/null && \               echo "Successful backup [$BACK_FILE] to the remote host:[$host:$REMOTE_DIR]" >>$LOG_FILE || \               echo "Backup [$BACK_FILE] to the remote host:[$host:$REMOTE_DIR] failed,please check it" >>$LOG_FILE             done         fi         #Backup complete, delete the copy of the source file         rm -rf $BASE_NAME         echo "Backup [$BACK_FILE] done into [$BAK_DIR] successfuly!" >> $LOG_FILE        #Existing N days old file, delete it         if [ -f $OLD_FILE ];then           rm -rf $OLD_FILE           echo "[$OLD_FILE],delete old file successfuly!" >> $LOG_FILE         fi       fi     else       echo "Wrong directory or file:[$BACK_FILE],please check it" >>$LOG_FILE     fi   done echo " " >> $LOG_FILE echo "--------------------------------------------------------" >> $LOG_FILE echo "Backup end at $(date +"%Y-%m-%d %H:%M:%S")" >> $LOG_FILE #LogEnd echo " " >> $LOG_FILE exit 0