Linux Notes

*sudo su - cammand for root access, to become root user. ( Sudo -l ) Folders = directory in linux Administrator = root user Software = package File system hierarchy Forward slash ( / ) = top level root directory ( Top level root directory - It is the foundation or starting point of the entire storage structure on a device. ) /Root = home directory for root user /Home = home directory for other user /Boot = contains bootable files for linux ( POST - Power on self test ) /Etc - contains all configuration files /Usr - by default software are installed in this directory /Bin ( full form - binary) = contains commands used by all users including root user. /Sbin ( full form - System binary ) = contains commands used only by root user /Opt = optional application software package ( eg - installing chrome in linux ) /Dev = essential device files , includes terminal devices , usb or any device attached to the system ( eg - printer , pen drive ) *Linux commands and it's use cases *Cat Command - U