ncat - network aware cat
SYNOPSIS
ncat -V | -h
ncat [ -c | -n | -v | -o stream | -b size ]... stream...
DESCRIPTION
ncat concatenates data streams similar to cat(1) except
the streams can be files or TCP connections. If no streams
are given on the command line ncat will default to reading
from standard input and writing to standard output.
There are several different forms for specifying a stream:
filename or filename:
Any filename containing a colon needs to be escaped
by adding a colon on the end, otherwise it will be
interpreted as a tcp stream. A special filename "-"
can be used to specify standard input or output.
host:port
Connect to host/port. This will fail if the remote
side is not ready for the connection.
:port Wait for a connection on port. This can block
indefinitely. If port is 0 (or omitted) ncat will
bind to a free port and display the port used on
standard error.
OPTIONS
-o, --output
Output to stream instead of standard output.
-b, --block-size
Use a different block size for reading and writing. The
default is 512 bytes. size can be given a suffix to
denote a multiplier: b for 512 , k for 1024, m for 1024k.
-v, --verbose
Show data transfer statistics.
-n, --no-delay
Disable buffering and merging small tcp packets. This can
reduce latency in some situations.
-c, --cork
Prevent TCP from sending partial packets across the net-
work until the connections is closed. This breaks compati-
bility with cat by not passing data on immediately, but it
may improve performance depending on your requirements.
Linux 2.2+ is required to use this option.
-V, --version
Display version and exit.
-h, --help
Display usage information and exit.
EXIT STATUS
0 Success
1 One or more errors occured reading data and ncat
continued onto the next stream.
255 A fatal error occured writing data.
BUGS
Some rarely used options found in cat(1) are missing from
ncat. These options can be recreated easily by using
another filter such as perl(1), awk(1), sed(1), or tr(1).
AUTHOR
Mark Pulford <mark-at-kyne-dot-com-dot-au>
SEE ALSO
cat(1), nc(1).
https://kyne.au/~mark/software/ncat.php
Man(1) output converted with man2html
