E: Unable to acquire the dpkg frontend lock (/var/lib/dpkg/lock-frontend), is another process using it?

ps aux | grep -i dpkg

// Kill processes which are running
sudo kill -9 <pid>

// Restart the accounts daemon
sudo systemctl restart accounts-daemon

View another examples Add Own solution

3.71

Picky1 115 points

                                    sudo kill -9 PID
sudo rm /var/lib/dpkg/lock-frontend
sudo apt update

Thank you! 7

3.71 (7 Votes)

Harish 120 points

                                    sudo lsof /var/lib/dpkg/lock
sudo lsof /var/lib/apt/lists/lock
sudo lsof /var/cache/apt/archives/lock

Thank you! 1

4 (1 Votes)

4.5

Gchiconi 100 points

                                    sudo rm /var/lib/apt/lists/lock
sudo rm /var/cache/apt/archives/lock
sudo rm /var/lib/dpkg/lock*

Thank you! 4

4.5 (4 Votes)

Mchid 90 points

                                    dkpg lock

Thank you! 18

4 (8 Votes)

4.33

Linc 80 points

                                    sudo lsof /var/lib/dpkg/lock
sudo lsof /var/lib/apt/lists/lock
sudo lsof /var/cache/apt/archives/lock

Thank you! 9

4.33 (9 Votes)

Morgan Thrapp 90 points

                                    ps aux | grep -i apt

sudo kill &lt;process_id&gt;
# Check if the process was killed by running the &lsquo;ps aux | grep -i apt&rsquo; command. If it is still running, force kill it with SIGKILL signal:

sudo kill -9 &lt;process_id&gt;
# Another, easier way would be to use the killall command. This will kill all the instances of a running program:

sudo killall apt apt-get

Thank you! 3

4 (3 Votes)

3.8

C.B 105 points

                                    sudo rm /var/lib/apt/lists/lock
sudo rm /var/cache/apt/archives/lock
sudo rm /var/lib/dpkg/lock*

Thank you! 5

3.8 (5 Votes)

3.83

David dormand 85 points

                                    dkpg lock

Thank you! 6

3.83 (6 Votes)

3.88

K1ck 95 points

                                    ps aux | grep -i apt

sudo kill &lt;process_id&gt;
# Check if the process was killed by running the &lsquo;ps aux | grep -i apt&rsquo; command. If it is still running, force kill it with SIGKILL signal:

sudo kill -9 &lt;process_id&gt;
# Another, easier way would be to use the killall command. This will kill all the instances of a running program:

sudo killall apt apt-get

Thank you! 8

3.88 (8 Votes)

Ben McGah 90 points

                                    sudo kill -9 PID
sudo rm /var/lib/dpkg/lock-frontend
sudo apt update

Thank you! 5

4 (5 Votes)

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E: Unable to acquire the dpkg frontend lock (/var/lib/dpkg/lock-frontend), is another process using it?

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