# tar -xzvf netcat-0.7..tar.gz

[root@znode02 netcat-0.7.]# ls

ABOUT-NLS   config.guess  configure     INSTALL     Makefile.am    NEWS    TODO

aclocal.m4  config.h.in   configure.ac  install-sh  Makefile.in    po

AUTHORS     config.rpath  COPYING       lib         missing        README

ChangeLog   config.sub    doc           m4          mkinstalldirs  src

# mkdir /apps

# ./configure --prefix=/apps/nc

[root@znode02 netcat-0.7.]# ls

ABOUT-NLS     config.h       config.sub    INSTALL     Makefile.am    po

aclocal.m4    config.h.in    configure     install-sh  Makefile.in    README

AUTHORS       config.log     configure.ac  lib         missing        src

ChangeLog     config.rpath   COPYING       m4          mkinstalldirs  stamp-h1

config.guess  config.status  doc           Makefile    NEWS           TODO

]# make && make install

# tree /apps/nc

/apps/nc

├── bin

│   ├── nc -> netcat

│   └── netcat

├── info

│   ├── dir

│   └── netcat.info

├── man

│   └── man1

│       └── netcat.

└── share

    └── locale

        ├── it

        │   └── LC_MESSAGES

        │       └── netcat.mo

        └── sk

            └── LC_MESSAGES

                └── netcat.mo

 directories,  files

# cat /root/.bash_profile

# .bash_profile

# Get the aliases and functions

if [ -f ~/.bashrc ]; then

    . ~/.bashrc

fi

# User specific environment and startup programs

PATH=$PATH:$HOME/bin

NC=/apps/nc

PATH=$PATH:$NC/bin

export PATH

# source ~/.bash_profile

# nc -h

GNU netcat 0.7., a rewrite of the famous networking tool.

Basic usages:

connect to somewhere:  nc [options] hostname port [port] ...

listen for inbound:    nc -l -p port [options] [hostname] [port] ...

tunnel to somewhere:   nc -L hostname:port -p port [options]

Mandatory arguments to long options are mandatory for short options too.

Options:

  -c, --close                close connection on EOF from stdin

  -e, --exec=PROGRAM         program to exec after connect

  -g, --gateway=LIST         source-routing hop point[s], up to

  -G, --pointer=NUM          source-routing pointer: , , , ...

  -h, --help                 display this help and exit

  -i, --interval=SECS        delay interval for lines sent, ports scanned

  -l, --listen               listen mode, for inbound connects

  -L, --tunnel=ADDRESS:PORT  forward local port to remote address

  -n, --dont-resolve         numeric-only IP addresses, no DNS

  -o, --output=FILE          output hexdump traffic to FILE (implies -x)

  -p, --local-port=NUM       local port number

  -r, --randomize            randomize local and remote ports

  -s, --source=ADDRESS       local source address (ip or hostname)

  -t, --tcp                  TCP mode (default)

  -T, --telnet               answer using TELNET negotiation

  -u, --udp                  UDP mode

  -v, --verbose              verbose (use twice to be more verbose)

  -V, --version              output version information and exit

  -x, --hexdump              hexdump incoming and outgoing traffic

  -w, --wait=SECS            timeout for connects and final net reads

  -z, --zero                 zero-I/O mode (used for scanning)

Remote port number can also be specified as range.  Example: '1-1024'