I've done a stupid mistake on Terminal preferences and now when i open it, it closes.
I managed to add a log-in set up when i access Terminal so it will ask me for sudo password. But i accidentally added a null "%00" character on the log-in command, and now every time i open the Terminal, it closes instantly.
I uninstalled gnome-terminal, and removed all possible temporary files, deleted ~/.gconf/gnome-terminal - and deleted all "gnome-terminal" existing files and folders. Then i reinstalled "gnome-terminal" via UXTerm, but still when i open it, it closes due to that log-in command i added. Now i don't know what to do to fix this problem. Can someone help me, please?