Knowledge Base

Unable to update system packages on Plesk server: The repository ‘http://dl.google.com/linux/mod-pagespeed/deb/dists/stable/Release.gpg’ is not signed

Symptoms

Tools & Settings > Updates and Upgrades > Update Components hangs with the following error:

The apg-get failed with the following message:
Reading package lists...
Building dependency tree...
Reading state information...
The command apt update fails with the error:

# apt update
..........
Reading package lists... Done
E: The repository 'http://dl.google.com/linux/mod-pagespeed/deb stable Release' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.

Cause

Bug EXTPLESK-3809 in Google PageSpeed Insights extension: PageSpeed module for Apache is incorrectly signed on the side of the repository maintainer

Resolution

Until the fix is released use the following workaround:

Connect to the server via SSH
Find the repository configuration file, e.g.:

# grep -ir pagespeed /etc/apt*
/etc/apt/sources.list.d/mod-pagespeed.list:deb http://dl.google.com/linux/mod-pagespeed/deb/ stable main
Remove the repository configuration file found during the previous step:

# mv /etc/apt/sources.list.d/mod-pagespeed.list ~/
Update APT indexes:

# apt update