Edited by com_bvv at 2016-3-12 00:23

sudo gedit /etc/apt/sources.list
edit as in the screenshot next: sudo apt-get update && sudo apt-get dist-upgrade -y
Good Luck!

Muchas Gracias

com_bvv ,
Please, put all the codes in the text.

Еxcuse me. Good luck

Edited by savanweylyn at 2016-3-14 19:54

If i were you, i would not recommend others to use sudo with a windowed application like gedit. Instead of sudo gedit i'd recommend using sudo nano/vim (or whatever you have) or gksu gedit, because sudo gedit can really mess up your system and for exmple could cause a login loop (and that's never a good thing).

Ok I have edited the sources.list but it hasn't made any difference, I can't install any software and the updates don't work at all. When I try to do the update via terminal, all I get is:

: Could not get lock /var/lib/apt/lists/lock - open (11: Resource temporarily unavailable)
E: Unable to lock directory /var/lib/apt/lists/

Reboot your system. It seems like something runs as root and prevents you from updating the system. Check Control center > System Information > Updates. If the round rotates, it means the system itself tries to update packages list(s). It will stop after some time, but if you reboot, it will stop and allow you to use sudo apt-get update. A log out > log in  won't be enough.

Ok this seems to be working. After I have done the update will I then be able to update the system normally from the control centre?

I had the same problem, and I guessed that "lock" file is something created if you started upgrading but then aborted, so I deleted that file and then everything works perfectly. But I am no experts, so if you are gonna try, make a backup first.

Edited by claireura at 2016-3-16 10:40

I just updated myself to March 10th using the japanese repo. South Africa's SAIX seems to have a repo from 4 days ago, but I get a timeout there.

About the lock- I do the same. Works everytime!
UPDATE: I can update to march 13 via SAIX thru terminal.