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Why can't I write to a file in /tmp?

In my run method I have:
filename = ‘/root/st2-%s.out’ % timestamp
with open(filename , ‘w’) as file:

This works, however if I try to put the file in /tmp I get no output file. Anyone know why I can’t write to /tmp? Are there other rules around security, etc. that I should be aware of?


It could be related to sticky bit (if one is set) on the /tmp folder. You can refer to or

What’s causing it is systemd + privateTmp=true.
See answer in different thread Create file in action not happening with webhook

Ahhh!!! So it’s a systemd thing, not a stackstorm thing!!! Thanks!!!