curl -ik "http://localhost/index.php?username=parto&password=hello!23"

username = parto
password = hello!23

curl -ik "http://localhost/index.php?username=parto&password=hellosudo apt-get update"

>!      Start a history substitution, except when followed by a blank,
          newline, = or (.
   !n     Refer to command line n.
   !-n    Refer to the current command minus n.
   !!     Refer to the previous command.  This is a synonym for `!-1'.
   !string
          Refer to the most recent command preceding the current
          position in the history list starting with string.
   !?string[?]
          Refer to the most recent command preceding the current
          position in the history list containing string.  The trailing
          ? may be omitted if string is followed immediately by a
          newline.
   ^string1^string2^
          Quick substitution.  Repeat the last command, replacing
          string1 with string2.  Equivalent to ``!!:s/string1/string2/''
          (see Modifiers below).
   !#     The entire command line typed so far.