- opt – OPTional software and packages
- bin – Essential command binaries are stored here
- sbin – Essential system binaries
- etc – Contains configuration files
- home – Any users home directories
- lib – contains common libraries
- mnt – Temporary file system file pendrives and cd drives comes under this directory
- proc – Contains virtual file system and stores kernal info
- tmp – temporary files are stored in this directory and files in this dir get deleted after restart
- usr – Contains user program and user data
- var – (variable)files and folders where system writes during and operation example system logs
Linux Essentails
- If $ symbol comes up after login in your terminal this means you have logged in as a user
- If # symbols comes up after login in you terminal means you have logged in as root user
- su (super user)command, it is used to login to an user account, if user name is not mentioned then su command will enter into root user.
su tyson - whoami – print which user you have logged in as in linux
- passwd – is the command to change the password of login
- id – unique id of the user is printer, for root it is zero
- which python
- whereis python
Bashrc and BashProfile Specific Change
- All the terminal specific changes(change color or change PS1) that you want to do can be done in ~/.bashrc file, below code add username@[directory_name] to your terminal
PS1="\u@[\W] $";
export PS1;