Linux OS Update & Reboot Check Commands

Operating System Update Commands Check for Reboot Required
Ubuntu sudo apt update && sudo apt upgrade [ -f /var/run/reboot-required ] && echo "Reboot required"
Debian sudo apt update && sudo apt upgrade [ -f /var/run/reboot-required ] && echo "Reboot required"
Rocky Linux sudo dnf update needs-restarting -r
(from dnf-utils)
AlmaLinux sudo dnf update needs-restarting -r
(from dnf-utils)
Raspbian sudo apt update && sudo apt upgrade [ -f /var/run/reboot-required ] && echo "Reboot required"
CentOS sudo yum update (CentOS 7)
sudo dnf update (CentOS 8)
needs-restarting -r
(from yum-utils or dnf-utils)