I don’t know when this has happened, because I have been using Ubuntu’s Unity desktop, but I have been using Fedora 18 in the past few days and GnomeShell being the default desktop, I noticed that its clock does not show seconds.
But I thought; ‘this is no big deal, I’m gonna just open up its configuration window and enable it‘ (just like how I’d do in Ubuntu). So I opened up the ‘Date & Time’ configuration window, but I could not find the option to do it.
Now having the seconds being displayed on the clock might not be a big deal for most users. But that’s the way I have been using it in the past, so I guess I’m kinda addicted to it :P.
Anyhow, luckily though, I was able to enable it using the command-line nevertheless. But that said, I still believe that it should be there in the configuration window, as an option, because most new users will not be able to figure it out by themselves.
Enabling it …
To enable showing seconds on the clock, open up your Terminal and enter the below command.
gsettings set org.gnome.desktop.interface clock-show-seconds true
As soon as you do this, you should see seconds appearing on the ‘Date & Time’ section on the upper panel.
Disabling it again …
If you want to disable it, then simply replace ‘true’ option with ‘false’, or you’re too lazy, then can just copy and paste the below command as well :D.
gsettings set org.gnome.desktop.interface clock-show-seconds false