echo - display a line of text.
Display text in the standard output:
echo Hello World !!!
Display the value of a variable:
echo $HOME
Display one word per line:
echo -e "Debian \nFedora \nUbuntu \nMint"
Display words with horizontal tab spaces:
echo -e "Debian \tFedora \tUbuntu \tMint"
Display words with vertical tab spaces:
echo -e "Debian \vFedora \vUbuntu \vMint"
Display text in the same line:
echo -n "Line one."
echo "Same line."
Display all the files and folders (ls alternative):
echo *
Display files by extension:
echo *.pdf
Generate a sequence of numbers:
echo {01..50}