environment-variables.md

environment-variables.md

Environment Variables - Affect process behavior in Linux.

• Common Environment Variables:

  • $HOME : User's home directory.
  • $PATH : Directories to search for executable files.
  • $USER : Current logged-in user.
  • $SHELL : Default shell for the user.
  • $EDITOR : Default text editor.

• Setting Environment Variables:

  export VAR=value  # set 'VAR' to 'value'

• Displaying Environment Variables:

  echo $PATH  # display PATH variable

• Using Variables:

  export GREETING="Hello"
  echo $GREETING  # outputs: Hello