Purge the user cache. An apt-file update will be needed before a search can be performed on the user cache. If the user cache doesn't exist, the system-wide cache can be used for user searches.
Purge
Clear "Contents-" files from the apt-file cache directory. If you receive any errors listing or searching, it's a good idea to perform a purge and then an update.
Refer post: https://www.computerhope.com/unix/apt-file.htm & https://wiki.debian.org/apt-file
apt-file purge
Purge the user cache. An apt-file update will be needed before a search can be performed on the user cache. If the user cache doesn't exist, the system-wide cache can be used for user searches.
Clear "Contents-" files from the apt-file cache directory. If you receive any errors listing or searching, it's a good idea to perform a purge and then an update.
To delete the system wide cache use:
related directories: