After updating to the latest Jenkins version the service refuses to start:
Nov 24 10:38:13 ubu-build sudo: pam_unix(sudo:auth): Couldn't open /etc/securetty: No such file or directory
maybe relates to https://askubuntu.com/a/1239584?
Need more information though, did you just upgrade to 20.04? has it worked previously?
cc Mark Waite
It did work previously.
In the meantime I found out that the actual issue seemed to be the Java version on the machine. After a downgrade to JRE 8 the service started just fine.
A downgrade to JRE 8 fixed the issue