01.1-Linux-Essentials.md

Quoting and Escaping:

• Double quotes ("): Allow variable and command expansion, but prevent most word splitting and globbing. Example:

  echo "Hello $name"      # Output: Hello World
  echo "This is \$name"   # Output: This is $name

• Single quotes ('): Everything inside is taken literally. No variable, command, or escape expansion. Example:

  echo 'Hello $name'      # Output: Hello
  echo 'It\'s fine'       # Output: It\'s fine (backslash is not special inside single quotes)

• Backslash (\): Escape special characters (space, dollar, quote, etc.) to prevent their usual meaning.

  echo Hello\ World       # Output: Hello World
  echo "Hello \"World\""  # Output: Hello "World"
  echo \$HOME             # Output: $HOME