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When doing daily updates on my Linux Mint 20 system, I noticed:

Reloading systemd
Failed to reenable unit: Unit file hddtemp.service does not exist.

that program I might have used in the past, but not now:

$ apt-cache policy hddtemp 
hddtemp:
  Installed: (none)
  Candidate: 0.3-beta15-53
  Version table:
     0.3-beta15-53 500
        500 http://archive.ubuntu.com/ubuntu focal/universe amd64 Packages

I thought purging residual configuration would help, but there was none to delete (sudo apt-get purge hddtemp).

I fail to see where this unit file is placed as I don't usually work with systemd.

Vlastimil Burián
  • 28,462

1 Answers1

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The hddtemp.service unit file is auto-generated by systemd, as the hddtemp package only has a van Smoorenburg rc file. Such auto-generated unit files, and the symbolic links that enable them from multi-user.target et al., live in subdirectories of /run/systemd.

Further reading

JdeBP
  • 68,745