The Linux Filesystem

/sbin has your system's essential elements.
/bin has other elements that need to be there though they may not be used.
/usr has most of the applications that you use.
/opt has some self-installed add-on applications.
/etc is where all system configuration files live.
/lib is where all libraries required by your system or applications live.
/media is where the contents of your various attached external media (USB, CD, etc.) appear when connected.
/home
- This subfolder has all the user accounts for your system.
- When you first login you're in your user account's home folder.
- If you enter the pwd command (print working directory), you'll see /home/username

The purpose of the other root folders are less straightforward and shouldn't be tampered with directly.

Source

Written on October 4, 2019