Ubuntu 12.04 64bit /sbin/insserv: No such file or directory

You may receive the following error while changing start up options using chkconfig on Linux server:

# chkconfig -s apache2 on
/sbin/insserv: No such file or directory

This can be fixed by creating the following symbolic link:

# ln -s /usr/lib/insserv/insserv /sbin/insserv