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Specifically, I am looking for a GUI-based crontab editor for Ubuntu 12.04 (I know, I know, but the company insists that we use a 12.04 VM for development, and if we upgrade it, our tools break).

Preferably Gnome, as I don't want to drag in too many KDE dependencies, but I don't rule it out.

Gratis, of course (which leads me to wonder if this something similar for Windows, other than this - which costs a whopping $349 !!).

Don't get wrong; a Windows app would be a nice bonus, and should interest others here, but my question is specific to Ubuntu, v12.04.

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I would take a look at Gnome Scheduler (Yes, it's Gnome and run's on Ubuntu and it's free)

GNOME GUI for configuring a users' cron (automatic jobs).

Some of its features are:

  • Templates support so that you won't have to create the same task again and again.
  • If run as root, you can edit any user's crontab and "at" tasks.
  • Human-readable strings like "Every hour" instead of "0 * * * *".
  • Advanced mode for crontab experts.
  • A calendar allows you to choose the day you want a task executed.

enter image description here

  • Not available for Ubuntu 16.04 LTS – SDsolar Aug 20 '17 at 23:57
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Edit: two hours after posting my answer, ComFreek detected it is the same product as in Tom's answer where it was named slightly different, and I didn't recognize it by the screenshot. For the additional details and screenshots, I leave my answer here nevertheless.

I don't use a GUI for Cron, but for beginners, Gnome-Schedule looks great and fitting all your requirements:

  • Preferably Gnome: Yupp, that's already in the name
  • Gratis: Yes.
  • GUI based crontab editor: Yes.
  • Ubuntu: Yes, that's what the Ubuntu Wiki (German) says :) It's in "universe".

You can find a closer description in an article on UbuntuGeek, which also includes some screenshots. Let me pick two:

Create a task (basic) Create a task (advanced)
Create a new task in Gnome Schedule (source: UbuntuGeek; click images for larger variants)

Another nice quick tutorial can be found at Dambalah, and its screenshots a.o. show how a list of existing jobs is presented:

List of scheduled jobs
List of scheduled jobs (source: Dambalah)

An article by Bart Bania shows another interesting screenshot:

new task (detailed)
New Job Details (source: Bart Bania)

Conclusion: When in need for a Cron GUI on Gnome, Gnome Schedule should fit your every needs. The menu bar shows I didn't even cover all features here (e.g. templates) – but as I covered all you've been after, that's for you to find out. Enjoy!

  • 1
    Is this the same software which Tom suggested in the other answer? Maybe that should be stated to avoid confusion or edited into one answer only. In any case, I'd keep the additional screeshots, though. – ComFreek Jul 28 '15 at 18:54
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    @ComFreek looks like you're correct: in Tom's answer the software was named slightly different (and the screenshot didn't look familiar to me) – but the link there seems to point to the same software. Sorry for that – as you suggested, I will update my answer to point that out (edit: done, with credits to you for your find). Thanks for the catch! – Izzy Jul 28 '15 at 19:08
  • Not available for Ubuntu 16.04 LTS – SDsolar Aug 20 '17 at 23:57
  • @SDsolar and vice-versa: at the time the answer was written, 15.04 / 14.04 LTS were the latest Ubuntu versions. – Izzy Aug 21 '17 at 6:08
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Gnome Scheduler can easily be installed in Linux Mint 18.3 and looks, at first sight, working very well.

Just download and manually install:

That's all!

enter image description here

  • 1
    After some time of testing, it looks working without problem at all! – SONewbiee Dec 20 '18 at 17:01

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