Now, run any one of the following commands as root user. In such cases, you can find the installation date like below. Check Filesystem Creation DateĪs stated, sometimes, you might have deleted the logs (or enabled log rotation). You still can find out the installation time of your Linux OS by verifying filesystem creation date as shown in the following section. What If the logs are deleted already? No problem. Sample output: Jul 2 10:29:10 ubuntu systemd: Starting Flush Journal to Persistent Storage. On Debian, Ubuntu and other DEB-based systems, look in the "syslog" entries to get Linux OS installation date and time $ sudo head -n1 /var/log/installer/syslog Check Syslog Entries On Debian-based systems I have 3 Arch Linux systems (One host and two vms) over the years, and I've never had to "reinstall" even once. And, I am sure I am not going to reinstall it anytime soon.
It works perfectly well without breaking anything. Sample output from my Arch Linux system: Running 'pacman -r /mnt -Sy -print-format=%s -cachedir=/mnt/var/cache/pacman/pkg -noconfirm base sudo grub wireless_tools wpa_supplicant wpa_actiond netctl dialog os-prober'Īs you see in the above, I am still using my first installation from May, 05 2016.Įven though Arch Linux is rolling release model, I have never had to reinstall Arch Linux. If you use Arch Linux and its derivatives like EndeavourOS and Manjaro Linux, you can easily find how long have you been using it without a reinstall by analyzing the pacman logs as shown below. Find exact Linux installation date and timeĪs you can see in the above outputs, the installation date and time of my Fedora Linux desktop is May 20, 2021.
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