If you have linux system with GUI, open terminal, type in sudo nautilus, type in password. A directory will pop up, then open Filesystem root.
Now we can see all the directories under root:
Directories
/bin: store basic functions/binaries such as bash, ls, cat, chmod, run in single user mode/sbin: sytstem binaries, system administrator can access, standard users have no acccess, run in single user mode/boot: contains everything the OS needs to boot/cdrom: mounting point for CD/dev: find hardware as linux treat everything as a file. Application and drivers will access./etc: where all configurations are stored (system wide configurations)/lib& /lib64: libraries application needs to function/media: it is where we can found other mounted drives e.g. disk, usb, second hard-drive/mnt: mounting things manually. Leave /media for OS to manage/opt: manually installed software from vendors are installed here, also install software we created/proc: every process will have a directory here/root: root user’s home folder/run: temp files. Stored in RAM. Everything in it is gone after system reboot or shut down./snap: snap packages are stored here/srv: service directory. Service data is here./sys: a way to interact with the kernel. Created every time system boots up/tmp: files temporary written by processes. Usually emptied by rebooting./usr: applications used by user installed here/var: variable directory. Contains information that is expected to grow in size./home: where we store personal files. Each user has a home directory.
