PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND
 4141 barracu+  20   0 2181152 929960 108276 R  39.9 22.8 178:21.88 firefox
 4042 barracu+  30  10  177924  92712  64880 R  24.3  2.3 128:47.32 update-man+
 2537 root      20   0  209320  41412  32108 S  15.6  1.0  73:33.24 Xorg
 3559 barracu+  20   0  331040 139892  53812 R   8.0  3.4  58:00.18 compiz
 3546 barracu+  20   0   74392  24636  20872 S   0.7  0.6   2:42.58 bamfdaemon
   22 root      39  19       0      0      0 S   0.3  0.0   0:17.18 khugepaged
14232 root      20   0       0      0      0 S   0.3  0.0   0:01.47 kworker/0:2
14779 barracu+  20   0    8408   3608   3048 R   0.3  0.1   0:00.13 top
    1 root      20   0   24204   5284   3832 S   0.0  0.1   0:09.39 systemd
    2 root      20   0       0      0      0 S   0.0  0.0   0:00.01 kthreadd
    3 root      20   0       0      0      0 S   0.0  0.0   0:00.26 ksoftirqd/0
    5 root       0 -20       0      0      0 S   0.0  0.0   0:00.00 kworker/0:+
    7 root      20   0       0      0      0 S   0.0  0.0   0:11.48 rcu_sched
    8 root      20   0       0      0      0 S   0.0  0.0   0:00.00 rcu_bh
    9 root      rt   0       0      0      0 S   0.0  0.0   0:00.04 migration/0
   10 root      rt   0       0      0      0 S   0.0  0.0   0:00.17 watchdog/0
   11 root      rt   0       0      0      0 S   0.0  0.0   0:00.17 watchdog/1
barracuda@barracuda-Lenovo-G550:~$ sudo apt update
E: Could not get lock /var/lib/apt/lists/lock - open (11: Resource temporarily unavailable)
E: Unable to lock directory /var/lib/apt/lists/
E: Could not get lock /var/lib/dpkg/lock - open (11: Resource temporarily unavailable)
E: Unable to lock the administration directory (/var/lib/dpkg/), is another process using it?
barracuda@barracuda-Lenovo-G550:~$