Could not get lock /var/lib/dpkg/lock - open (11: Resource temporarily unavailable) in ubuntu ???

Checked for "is another process using it?":
Code:

ps aux  | egrep -i 'apt|ftp|kpack|dpkg'  | less

I killed them all anyway, just to be sure:
Code:

killall -9 apt* kpackage dpkg

If you ever use synaptic (it's removed from my system), you should make that:
Code:

killall -9 apt* kpackage dpkg synaptic

Having confirmed that there were no "rogue" pkg. managers running, I checked, removed, & rechecked the lock file:
Code:

ls -l /var/lib/dpkg/lock
rm -f /var/lib/dpkg/lock
ls -l /var/lib/dpkg/lock