Unable to lock the administration directory /var/log/dpkg/,is another process using it,solved

sudo lsof /var/lib/dpkg/lock

Find the process PID which is using the lock

kill -9 (PID that you found using lsof)





source:http://askubuntu.com/questions/15433/unable-to-lock-the-administration-directory-var-lib-dpkg-is-another-process