Score:1

Ubuntu

See terminal text. 'Waiting for cache lock' error. How to fix? I'm on Ubuntu 21.04

Tom Childers

11/17/22, 11:37 AM

advait@advait-Bravo-15-A4DDR:~$ sudo apt install ubuntu-restricted-extras
Waiting for cache lock: Could not get lock /var/lib/dpkg/lock-frontend. It is held by process 43843 (synaptic)      
Waiting for cache lock: Could not get lock /var/lib/dpkg/lock-frontend. It is held by process 43843 (synaptic)      
Waiting for cache lock: Could not get lock /var/lib/dpkg/lock-frontend. It is held by process 43843 (synaptic)      
Waiting for cache lock: Could not get lock /var/lib/dpkg/lock-frontend. It is held by process 43843 (synaptic)      
Waiting for cache lock: Could not get lock /var/lib/dpkg/lock-frontend. It is held by process 43843 (synaptic)      
Waiting for cache lock: Could not get lock /var/lib/dpkg/lock-frontend. It is held by process 43843 (synaptic)

19996

1 + 2

package-management

cache

software-installation

Michal Przybylowicz

11/17/22, 11:41 AM

Another process `synaptic` is holding ownership of the lock file. Close the synaptic or kill it `sudo killall -9 synaptic` then re-run Your apt command. If that won't work and synaptic is already killed just remove the lock file `sudo rm /var/lib/dpkg/lock-frontend` and re-run apt.

guiverc

11/17/22, 11:42 AM

Check another workspace, or another window, you'll have started `synaptic` and caused the hold, and then forgotten about it.

Score:2

Ubuntu

vanadium

11/17/22, 12:32 PM

Close synaptic package manager, and the "sudo apt install" command will automatically continue.

You cannot have two different applications that work with the APT package management system open at the same time.

Yes, I very frequently see the same messages as you ;)

0 + 1

Tom Childers

11/18/22, 3:23 PM

This worked. I closed Synaptic and was able to complete the task.

Score:0

Ubuntu

Abdoo Bas

5/12/23, 2:24 PM

This answer on Unix & Linux SE by Stéphane Chazelas has some useful commands:

If you want to kill processes based on their name or argument list, use pkill.
pkill regexp
Will kill all processes whose name matches the regexp extended regular expression.
pkill -f regexp
Will kill all processes whose list of arguments (including the first which usually contains the command name) concatenated with spaces matches the regexp.

0 + 0

Tom Childers

5/13/23, 3:41 PM

Thanks for the suggestion but unfortunately I have no idea what "regexp" or a regular expression is. I'll have to research.

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: See terminal text. 'Waiting for cache lock' error. How to fix? I'm on Ubuntu 21.04

TH: See terminal text. 'Waiting for cache lock' error. How to fix? I'm on Ubuntu 21.04

RO: See terminal text. 'Waiting for cache lock' error. How to fix? I'm on Ubuntu 21.04

RU: See terminal text. 'Waiting for cache lock' error. How to fix? I'm on Ubuntu 21.04

VI: See terminal text. 'Waiting for cache lock' error. How to fix? I'm on Ubuntu 21.04

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