dopo vari tentativi ho capito che devo usare kate al posto di gedit (ho installato kubuntu)
comq dopo aver digitato sudo kate etc/resolv.conf mi dice:
X Error: BadDevice, invalid or uninitialized input device 168
Major opcode: 145
Minor opcode: 3
Resource id: 0x0
Failed to open device
X Error: BadDevice, invalid or uninitialized input device 168
Major opcode: 145
Minor opcode: 3
Resource id: 0x0
Failed to open device
Xlib: connection to ":0.0" refused by server
Xlib: No protocol specified
kdeinit: Can't connect to the X Server.
kdeinit: Might not terminate at end of session.
Xlib: connection to ":0.0" refused by server
Xlib: No protocol specified
kded: cannot connect to X server :0.0
kded: ERROR: KUniqueApplication: Registering failed!
kded: ERROR: Communication problem with kded, it probably crashed.
kdeinit: Shutting down running client.
---------------------------------
It looks like dcopserver is already running. If you are sure
that it is not already running, remove /root/.DCOPserver_yuk-desktop__0
and start dcopserver again.
---------------------------------
Xlib: connection to ":0.0" refused by server
Xlib: No protocol specified
kdeinit: Can't connect to the X Server.
kdeinit: Might not terminate at end of session.
Xlib: connection to ":0.0" refused by server
Xlib: No protocol specified
kded: cannot connect to X server :0.0
kded: ERROR: KUniqueApplication: Registering failed!
kded: ERROR: Communication problem with kded, it probably crashed.
kio (KSycoca): ERROR: No database available!
kio (KSycoca): ERROR: No database available!
kio (KSycoca): ERROR: No database available!
kio (KSycoca): ERROR: No database available!
KCrash: Application 'kate' crashing...
Warning: connect() failed: : No such file or directory
KCrash cannot reach kdeinit, launching directly.
Xlib: connection to ":0.0" refused by server
Xlib: No protocol specified
drkonqi: cannot connect to X server :0.0
yuk@yuk-desktop:~$
però è un passo avanti!!