shell全备份脚本（借鉴别人的，在其基础上修复完善了bug）

#!/bin/bash
# Shell script to backup MySql database
# Last updated: Aug - 

MyUSER="root"     # USERNAME
MyPASS="root"       # PASSWORD
MyHOST="localhost"          # Hostname

# Linux bin paths, change this if it can not be autodetected via which command
MYSQL="$(which mysql)"
MYSQLDUMP="$(which mysqldump)"
CHOWN="$(which chown)"
CHMOD="$(which chmod)"
GZIP="$(which gzip)"

# Backup Dest directory, change this if you have someother location
DEST="/backup"

# Main directory where backup will be stored
MBD="$DEST/mysql"

# Get hostname
HOST="$(hostname)"

# Get data in dd-mm-yyyy format
NOW="$(date +"%d-%m-%Y")"

# File to store current backup file
FILE=""
# Store list of databases
DBS=""

# DO NOT BACKUP these databases
IGGY="test"

[ ! -d $MBD ] && mkdir -p $MBD || :

# Only root can access it!
$CHOWN 0.0 -R $DEST
$CHMOD  $DEST

# Get all database list first
DBS="$($MYSQL -u $MyUSER -h $MyHOST -p$MyPASS -Bse 'show databases')"

for db in $DBS
do
    skipdb=-
    if [ "$IGGY" != "" ];
    then
    for i in $IGGY
    do
        [ "$db" == "$i" ] && skipdb= || :
    done
    fi

    if [ "$skipdb" == "-1" ] ; then
    FILE="$MBD/$db.$HOST.$NOW.gz"
    # do all inone job in pipe,
    # connect to mysql using mysqldump for select mysql database
    # and pipe it out to gz file in backup dir :)
        $MYSQLDUMP -u $MyUSER -h $MyHOST -p$MyPASS  --events --ignore-table=mysql.event --skip-events --default-character-set=utf8 --skip-lock-tables $db | $GZIP - > $FILE
    fi
done