What is the output of the following Linux shell (bash) commands?x=1 { x=2; } (x=3) echo $x

x=1
{ x=2; }
(x=3)
echo $x

Explanation

Commands inside braces { } run in the current shell, so x becomes 2, whereas commands inside parentheses ( ) run in a subshell and its changes to variables are lost when it ends, so echo prints 2.