Stop Rebooting Linux Just in Case: Practical `needrestart` After APT Upgrades

If you manage Debian or Ubuntu systems long enough, you eventually hit the same messy question after apt upgrade : "Do I actually need to reboot this machine, or do I just need to restart a few services?" A lot of admins solve that uncertainty with habit: reboot everything. It works, but it is often unnecessary, and on production boxes it can be a sloppy answer to a more precise problem. needrestart is the tool built for that gap. It checks which running processes still use old libraries after p