Linux Directories

Linux Mnemomic: 
List of directories at the root level and a mnemonic to remember them.
bin, boot, dev, etc, home, lib, mnt, media, sbin, usr, var​

"Binny’s boot doesn’t even have leather material; might sell used version"

Let's understand each of the Linux root-level directory functions:
bin: User Binary (bin) contains common commands like cd, ls, and ps etc used by all the systems.
boot: Contains Bootloader related information
dev: Device Files contains specials files to represent the attached devices tot he system such as USB etc. Also contain the VM's

etc.: contains configuration and system scripts such as the start/stop of each program. No binaries in this directory. A couple of key files in etc is 

• passwd: This file contains information about all users accessing the machine, including their names, the path to their home directory, and all programs that start running when they log in.
• shadow: This file contains the authentication info of the user, including username and salted password
• profile:  Files and commands that start up at the login or startup and can be set at the Global Level.
• networks:  Contains the names of the network that the system is located on.
• hosts:  The file contains the machine IP address if it's connected to the network
• cron: contains cron scripts
• init.d: Malware uses it to hide and initiate execution upon the system startup

home: Contains Data files and config files of a paticular user
lib: contains software libraries and kernel modules required by /bin and /sbin
mnt:: Temporary Mounting point for the removable external and remote file system 
media: Mounted and Unmount information about each media like CD -Rom
sbin: System Administrator Binaries (sbin) contain root only binaries such is ifconfig, fdisk, \  
usr: Contains binaries that are used by a User
var: Contains Security and Application Logs. syslog, varlog, faillog, also contain /var/tmp

Note: Remember Linux Directories are case-sensitive