I'm using Gnome 3 / Gnome-shell, and Ubuntu 13.10.
I'd like to display the timestamp (as in, the number of seconds since 1970/01/01 00:00 UTC) next to the clock in the top bar. I figured out I just needed to change the time format and add a %s.
Then I searched where I could change the time format and found dconf keys com.canonical.indicator.datetime.time-format
and ....custom-time-format
. I set the second one to "custom" (using dconf-editor) and the first one to %l:%M %p - %s
but nothing changed. Actually, nothing in the whole dconf directory changed a single thing on the clock as I fiddled. (nor did logging off and on again)
I thought that it may come for gnome-tweak-tool overriding the settings, but I don't know how to make it use the standard parameters. When I change clock settings in gnome-tweak-tool, they're immediately used.
I've tried everything I could find on google... I'm even wondering if it would not be simpler to create my own locale, but I'm not even sure it will do the trick, as I don't know what gnome-tweak-tool (or some other software I'm not even aware) does to the clock...
Thank you