Can login shell for the sync/halt/shutdown user in passwd be safely changed to /sbin/nologin ?
Issue
- Can login shell for the
sync
/halt
andshutdown
user in/etc/passwd
be safely changed to/sbin/nologin
(for a stronger security posture)? - Why does a separate user
sync
exist in the/etc/passwd
file? - What is the purpose of the
sync
user in the/etc/passwd
file?
Environment
- Red Hat Enterprise Linux
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