I wrote SysUpdate because I kept forgetting which package manager a distro used when jumping between systems.
The tool detects the distro and updates all available package managers automatically (apt, dnf, pacman, zypper, etc).
It’s a simple Bash tool and should work on most distributions.
Tested on: Arch, Fedora, Ubuntu, Debian, Linux Mint, OpenSUSE Tumbleweed.
Feedback or distro edge cases are welcome.