Current location - Quotes Website - Signature design - Sudo apt-get update error: n: It is not safe to update with this source, so it is disabled by default.
Sudo apt-get update error: n: It is not safe to update with this source, so it is disabled by default.
Replace the signature with the one that reported the error.

If it still doesn't work, it means that the signal source is not working and needs to be changed.

Modify the file/etc//etc /etc/apt/sources.list

Delete unused software sources

Jiugongge-> Open software and updates-> "other software"->; Click the unavailable software source and delete it.