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needrestart:tldr:7ca54
The "needrestart -b" command is used to check if any running processes on a Linux system require a restart due to the upgrade or update of some critical system libraries.
By running this command, the "needrestart" tool scans the system for processes that may still be using old versions of libraries that have been replaced or updated during system upgrades. It then provides a list of those processes and recommends whether or not a system restart is necessary to ensure the proper functioning of the updated libraries.
The "-b" option in the command stands for "recommended reboot". It instructs the "needrestart" tool to only output the list of processes that it strongly recommends restarting. If a process is not listed, it is considered safe and does not require a restart.
By using "needrestart -b", system administrators can easily identify which processes need to be restarted after system upgrades to avoid potential conflicts or instability caused by outdated library versions.