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I have a process that fails on startup due to some permission issues. I want to check what files it tries to open on startup but with lsof I can list only opened files for a running process but what can I do when it fails to start?

8

You can start process by hand, and use strace to know what files it tried to open:

strace -f -e trace=open -o process.trace <command to start process>

Then manipulate file process.trace to determine what you want.

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