Respawn MySQL on Ubuntu? Server ran out of memory, killed MySQL & Apache, MySQL didn't respawn

Credit from: http://askubuntu.com/a/451889

Create a script to check status and start if not found:

    #!/bin/bash
    if [[ ! "$(/usr/sbin/service mysql status)" =~ "start/running" ]]
    then
        /usr/sbin/service mysql start
    fi

Make sure script is executable:

    chmod +x /path/to/script

Finally create a cron to run the script:

    sudo crontab -e

And add (one of) the following lines to the crontab:

    */1 * * * * /path/to/script  ### Every Minute
    */5 * * * * /path/to/script  ### Every 5 minutes
    */10 * * * * /path/to/script ### Every 10 minutes
    */30 * * * * /path/to/script ### Every 30 minutes
    0 * * * * /path/to/script    ### Every hour

 # * * * * *  command to execute
 # │ │ │ │ │
 # │ │ │ │ │
 # │ │ │ │ └───── day of week (0 - 6) (0 to 6 are Sunday to Saturday, or use names; 7 is Sunday, the same as 0)
 # │ │ │ └────────── month (1 - 12)
 # │ │ └─────────────── day of month (1 - 31)
 # │ └──────────────────── hour (0 - 23)
 # └───────────────────────── min (0 - 59)

You can set the cron to be whatever time works for you, I just gave more example times than the original post did, in case you would like some ideas.