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What is a service in Ubuntu?
service runs a System V init script or systemd unit in as predictable an environment as possible, removing most environment variables and with the current working directory set to /. The SCRIPT parameter specifies a System V init script, located in /etc/init.
What is the difference between Systemd and Systemctl?
systemd gives us the systemctl commands suite which is mostly used to enable services to start at boot time. We can also start, stop, reload, restart and check status of services with the help of systemctl .
Where is etc init?
The configuration file (. conf) of these scripts are located under /etc/init & the scripts that are used as defaults are located under /etc/default. Within /etc/init.
What’s the difference between init.d service and initctl?
E.g. In my particular instance cron runs out of initctl, and ssh runs out of service. But on Fedora, for example, both of those will be in systemctl. initctl list will show the process managed using upstart native file. service will show those using a more traditional init script. systemctl will show the one using systemd native format.
When to use systemctl or service in Ubuntu?
For portability over various versions of Ubuntu, users can reliably use the service command to start, stop, restart or examine the status of a service. For more complex tasks, however, the actual command being used, be that initctl or systemctl or the /etc/init.d script might have to be used directly.
Which is the best init script for Ubuntu?
Ubuntu is migrating from older scripts to upstart jobs and in your case, cron is managed by upstart and ssh is still a regular initscript. Upstart do provides some feature that init script don’t ( like automated restarting if the service die, on demand starting, etc ), so packagers are encouraged to migrate to upstart jobs.
What to do with Service Command in Ubuntu?
Since the service command is a fairly simple wrapper, it only supports a limited subset of actions compared to what the actual init system might provide. For portability over various versions of Ubuntu, users can reliably use the service command to start, stop, restart or examine the status of a service.