mysqldump doesn't work in crontab

Question

I\'m trying to add a cronjob in the crontab (ubuntu server) that backups the mysql db.

Executing the script in the terminal as root works well, but inserted in the c

Answer 1

Local Host mysql Backup: 0 1 * * * /usr/local/mysql/bin/mysqldump -uroot -ppassword --opt database > /path/to/directory/filename.sql

(There is no space between the -p and password or -u and username - replace root with a correct database username.)

It works for me. no space between the -p and password or -u and username

Answer 2

Ok, I had a similar problem and was able to get it fixed.

In your case you could insert that mysqldump command to a script then source the profile of the user who is executing the mysqldump command for eg:

. /home/bla/.bash_profile

then use the absolute path of the mysqldump command

/usr/local/mysql/bin/mysqldump -u root -pHERE THERE IS MY PASSWORD --all-databases | gzip > /var/db_backups/database_`date +%d%m%y`.sql.gz

Answer 3

Alternatively you can create a custom command mycommand. To which you can add more options. You must give execute permissions.

It is preferable to have a folder where they store all your backups, in this case using a writable folder "backup" which first create in "your home" for example.

My command in "usr/local/bin/mycommand":

#!/bin/bash
MY_USER="your_user"
MY_PASSWORD="your_pass"
MY_HOME="your_home"
case $1 in 
"backupall")
    cd $MY_HOME/backup
    mysqldump --opt --password=$MY_PASSWORD --user=$MY_USER  --all-databases > bckp_all_$(date +%d%m%y).sql
    tar -zcvf bckp_all_$(date +%d%m%y).tgz bckp_all_$(date +%d%m%y).sql
    rm bckp_all_$(date +%d%m%y).sql;;
*)  echo "Others";;
esac

Cron: Runs the 1st day of each month.

0 0 1 * * /usr/local/bin/mycommand backupall

I hope it helps somewhat.