WIP

NAME:
    tcp – list open TCP connections.

SYNOPSIS:
    tcp [ opts... ]

OPTIONS:
    -h, --help                  print usage information.
    -v, --version               print version number.
    -a, --all                   same as -f, -s, -e.
    -e, --est                   include `established` connections in the output.
    -f, --ftp                   include `ftp` connections in the output.
    -s, --ssh                   include `ssh` connections in the output.
    -n, --num                   show network numbers instead of host names.
    -p, --pretty                pretty print output.

EXAMPLES:
    TODO