Szybkie znajdowanie obecnie zainstalowanej wersji systemu oraz data instalacji

• Novell SuSE---> /etc/SuSE-release
• Red Hat--->/etc/redhat-release, /etc/redhat_version
• Fedora-->/etc/fedora-release
• Slackware--->/etc/slackware-release, /etc/slackware-version
• Old Debian--->/etc/debian_release, /etc/debian_version
• New Debian--->/etc/os-release
• Mandrake--->/etc/mandrake-release
• Yellow dog-->/etc/yellowdog-release
• Sun JDS--->/etc/sun-release
• Solaris/Sparc--->/etc/release
• Gentoo--->/etc/gentoo-release
• *buntu --->cat /etc/issue
•  *buntu (jak reszta nie wiem) --->cat /etc/*-release ---> pełne info Distro release ; Distro id distro base  itp 

Data instalacji systemu

https://www.ostechnix.com/find-exact-installation-date-time-linux-os/

oraz

ls -ld /var/log/installer