linux - Check if service exists in bash (CentOS and Ubuntu) -

linux - Check if service exists in bash (CentOS and Ubuntu) -

what best way in bash check if service installed? should work across both reddish hat (centos) , ubuntu?

thinking:

service="mysqld" if [ -f "/etc/init.d/$service" ]; # mysqld service exists fi

could utilize service command , check homecoming code.

service mysqld status if [ $? = 0 ]; # mysqld service exists fi

what best solution?

rustam mamat gets credit this:

if list services, can grep results see what's in there. e.g.:

# restart apache2 service, if exists. if service --status-all | grep -fq 'apache2'; sudo service apache2 restart fi

linux bash ubuntu service centos