The `GUARD_ARCHIVE_ROOT` variables points to a [guardian code archive](guardian-code-archives).
Some notes:
* The `IFO` and `SITE` variables should be set as expected.
* The `GUARD_CHANFILE` variable points to the location where the guardian channel list ini file will be written, used by the CDS DAQ. *This file location must be writable by the guardctrl user.* (For the LIGO case above we touch the file and make it writable by the `controls` group, which the `guardian` user is a member of).
* The `GUARD_ARCHIVE_ROOT` variable points to a [guardian code archive](guardian-code-archives).
