Well, if by default, /tmp's permissions would allow the amanda user to recreate this missing directory when it come up missing, it wouldn't bother me. But while it seems amanda can create and maintain its own log files in /tmp/amanda, and in /tmp/amanda-dbg with subdirs there another 3 levels deep, my wrapper script, running as the user amanda, and who is a member of group disk, seems not to have perms to create this /tmp/amanda/Daily subdir when it comes up missing, so I have to su -, create it, then chown it to amanda:disk again when it comes up missing.
The parent 'amanda' and amanda-dbg directories are user only access. and I note that the /tmp/aanda tree has nothing older than the 12th of Dec in it right now. with a 30 tape, tape a day format, there should be stuff back to Nov 16th in it now.
I don't ever run any of the 'disk cleaner' utils as I have some stuff a decade+ old. Yeah, in some respects I am a packrat, but I just found some decade old code for os9/6809 that had the source for a boot from the hard drive module and made it work yesterday, unlike the commercial software I bought for that. Yup, believe it or not, I have a 'trash 80' color computer in the basement with 2 hard drives on it, running right now, logged into it with minicom. Its (the coco3) only 23 years old.
amanda is a system user here, but gets its privileges by being made a member of group disk. No shell, no password has ever been setup. Doesn't need it.
If it happens again, and I know it will, I suppose I can move that logfile to some other place that isn't subjected to a cleanup at odd intervals.