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TIMER SERVICE
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Convert TIMER to SERVICE

Verified by Adam B.· reviewed by FE Editorial ·updated Aug 29, 2026
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Is it possible to convert TIMER to SERVICE?
Yes - TIMER converts to SERVICE.

You don't turn a .timer into a .service; instead you create (or edit) the companion .service file that the timer activates. A .timer only stores the schedule, while the paired .service with the same base name holds the command to run.

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Tested on macOS, Windows & Linux
Last verified Sep 2026

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Why convert TIMER to SERVICE?

In systemd these are two halves of one job: the .timer says when, and the .SERVICE says what. So the realistic task is not conversion but writing the matching service unit that the timer triggers, either by default name match or via the Unit= directive.

How to convert TIMER to SERVICE

Any text editor FREE

Create a file with the same base name, e.g. backup.service next to backup.timer, adding a [Service] section with ExecStart= set to your command; the timer triggers it automatically by name.

systemctl edit FREE

Run systemctl edit --full --force backup.service to open a new unit in the correct directory, define ExecStart=, then systemctl daemon-reload and enable the timer.

About these formats

.TIMER Systemd Timer Unit File

A .timer file is a systemd unit that schedules when another unit (usually a matching .service file) runs on Linux, working as a modern replacement for cron. It is a small plain-text file in…

Open .TIMER details →
.SERVICE Mac OS X Service Application

A .SERVICE file is associated with Mac OS X Service Application, a system file.

Open .SERVICE details →

Quality & what to watch

  • By default a backup.timer activates backup.service; use Unit= in the timer's [Timer] section only if the service name differs.
  • The service should typically be Type=oneshot for scheduled tasks so systemd treats each run as a discrete job.
  • After creating or changing the unit, run systemctl daemon-reload or the timer won't pick up the new service.

Frequently asked questions

Can a timer run without a service?
No; the timer only schedules, so it must activate a corresponding .service unit that defines the command.
How does the timer know which service to run?
By matching base name (foo.timer runs foo.service), unless you override it with Unit= in the timer file.
Do I enable the timer or the service?
Enable and start the .timer; systemd starts the service on schedule for you.
Where do these unit files live?
In /etc/systemd/system/ for system-wide units, and run systemctl daemon-reload after editing.