Depending on your Linux version there are different commands to update the system from a repository.

What command is needed to preview whether a reboot will be required.... In other words - BEFORE an update, rather than after.

  • for SLES/OpenSUSE?
  • for Debian/Ubuntu?
  • for RHEL/CentOS/Fedora?

For Debian & Ubuntu, you could do an upgrade dry-run via apt-get dist-upgrade -s and look for a new kernel being installed. Except in very few cases, this should cover everything.

Exceptions I can think of:

  • root or other critical partitions on a third-party kernel module that gets upgraded.
  • grsec locking in the kernel, where some actions are not available until the reboot
  • thx for the answer. need to get some system(s) installed to test. – Michael Felt Mar 29 '17 at 7:03

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