Linux file system is inherited from UNIX. Knowing there directories can help you find files when you need them. I also not remember all but it is to know some of it.
|/||The root directory|
|/boot||Boot loader files, Linux kernel|
|/etc||System configuration files|
|/home||User home directories|
|/lib||Shared libraries. kernel modules|
|/lost+found||Recovered files (if found after a file system check)|
|/media||Mount point for removable media, such as DVDs and floppy disks|
|/mnt||Usual mount point for local, remote file systems, file systems that are additional to the standard, such as a DVD-ROM or another HDD|
|/opt||Add-on software packages|
|/proc||Kernel information, process control|
|/root||Super user (root) home|
|/sbin||System commands (mostly root only)|
|/sys||Real-time information on devices used by the kernel|
|/usr||Software not essential for system operation, such as application|
|/var||Variables files relating to services that run on the system, but whose contents are expected to change regularly during normal operation|
To read the ma page for the Linux file system hierarchy. Use below command.
- man hier
This returns a detailed listing, with a description of each part.
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