1 Simple commands:

     2 

     3   $ echo foo

     4   foo

     5   $ echo 'bar\nbaz' | cat

     6   bar

     7   baz

     8 

     9 Multi-line command:

    10 

    11   $ foo() {

    12   >     echo bar

    13   > }

    14   $ foo

    15   bar

    16 

    17 Regular expressions:

    18 

    19   $ echo foobarbaz

    20   foobar.* (re)

    21   $ echo barbazquux

    22   .*quux.* (re)

    23 

    24 Literal match ending in " (re)":

    25 

    26   $ echo 'foo (re)'

    27   foo (re)

    28 

    29 Exit code:

    30 

    31   $ false

    32   [1]