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Have you ever wondered when did you installed your operating system? Was a year ago or maybe two, three who knows right? Well, linux is a smart system and knows everything for itself! You can open the terminal, write a simple command and the answer is going to be in front of you. So lets do it open the terminal and type:

sudo dumpe2fs /dev/sda1 | grep 'Filesystem created:'
Code language: Bash (bash)

You are going to see something like:

root@ro22proxy3:~# sudo dumpe2fs /dev/sda1 | grep 'Filesystem created:' dumpe2fs 1.42.13 (17-May-2015) Filesystem created: Tue May 9 13:24:21 2017
Code language: Bash (bash)

So our operating system was installed in May 2017 and we even have the date and exact time… May 9 13:24:21.

So thats it in one single command we found the full information about are operating system installation date.

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