Public bug reported:
Today I saw on IRC this reported:
raub@desktop:~$ sudo ifdown --force br0 && sudo brctl delbr br0
/etc/network/if-down.d/ubuntu-fan: 29: /etc/network/if-down.d/ubuntu-fan:
/usr/sbin/fanctl: not found
run-parts: /etc/network/if-down.d/ubuntu-fan exited with return code 127
bridge br0 doesn't exist; can't delete it
I checked what that could be and found an interesting case.
When ubuntu-fan is installed all is fine, we have a hook
/etc/network/if-down.d/ubuntu-fan
and a binary
/usr/sbin/fanctl
But if a user removed the package, then we get into trouble.
The hook is in /etc and therefore by default considered to be a conffile.
Therefore we only have the hook left which fails by:
/usr/sbin/fanctl: not found
** Affects: ubuntu-fan (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1742712
Title:
package removal leave scripts that fail lacking the binaries
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