Linux shell script for database backup

Question

I tried many scripts for database backup but I couldn\'t make it. I want to backup my database every hour.
I added files to \"/etc/cron.hourly/\" folder, changed its chm

Answer 1

Now, copy the following content in a script file (like: /backup/mysql-backup.sh) and save on your Linux system.

    #!/bin/bash

    export PATH=/bin:/usr/bin:/usr/local/bin
    TODAY=`date +"%d%b%Y"`

    DB_BACKUP_PATH='/backup/dbbackup'
    MYSQL_HOST='localhost'
    MYSQL_PORT='3306'
    MYSQL_USER='root'
    MYSQL_PASSWORD='mysecret'
    DATABASE_NAME='mydb'
    BACKUP_RETAIN_DAYS=30   

    mkdir -p ${DB_BACKUP_PATH}/${TODAY}
    echo "Backup started for database - ${DATABASE_NAME}"

    mysqldump -h ${MYSQL_HOST} \
   -P ${MYSQL_PORT} \
   -u ${MYSQL_USER} \
   -p${MYSQL_PASSWORD} \
   ${DATABASE_NAME} | gzip > ${DB_BACKUP_PATH}/${TODAY}/${DATABASE_NAME}-${TODAY}.sql.gz

if [ $? -eq 0 ]; then
  echo "Database backup successfully completed"
else
  echo "Error found during backup"
  exit 1
fi


##### Remove backups older than {BACKUP_RETAIN_DAYS} days  #####

DBDELDATE=`date +"%d%b%Y" --date="${BACKUP_RETAIN_DAYS} days ago"`

if [ ! -z ${DB_BACKUP_PATH} ]; then
      cd ${DB_BACKUP_PATH}
      if [ ! -z ${DBDELDATE} ] && [ -d ${DBDELDATE} ]; then
            rm -rf ${DBDELDATE}
      fi
fi

After creating or downloading script make sure to set execute permission to run properly.

$ chmod +x /backup/mysql-backup.sh

Edit crontab on your system with crontab -e command. Add following settings to enable backup at 3 in the morning.

0 3 * * * root /backup/mysql-backup.sh