After installing and configuring ppadial/automysqlbackup the following results occur in Ubuntu 16.04:

    run-parts: failed to exec /etc/cron.daily/runmysqlbackup: Exec format error
    run-parts: /etc/cron.daily/runmysqlbackup exited with return code 1

    /etc/cron.daily/runmysqlbackup: 1: /etc/cron.daily/runmysqlbackup: !/bin/sh: not  found
    Parsed config file "/etc/automysqlbackup/automysqlbackup.conf"

    # Checking for permissions to write to folders:
    base folder /var/backup ... exists ... ok.
    backup folder /var/backup/db ... exists ... writable? yes. Proceeding.
    chown: invalid option -- 't'
    Try 'chown --help' for more information



/usr/local/bin/automysqlbackup /etc/automysqlbackup/myserver.conf

chown root.root /var/backup/db* -R find /var/backup/db* -type f -exec chmod 400 {} \; find /var/backup/db* -type d -exec chmod 700 {} \;

Ideally, neither of these messages would occur! How to get there from here?

1 Answer 1


Your interpreter is unknown so it does not no how to execute, as indicated by the error

!/bin/sh: not found

Putting a hash at the start of the first line should address your issue.

What you probably want is

chown root.root /var/backup/db* -R
find /var/backup/db* -type f -exec chmod 400 {} \; 
find /var/backup/db* -type d -exec chmod 700 {} \;

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