Tech Tip: TCP/IP Access Using bash
Most of us default to wget, curl, netcat and others when in need of network data from the commandline, not knowing, or perhaps forgetting, that bash often provides the support that we need using redirection from /dev/proto/host/port.
$ cat </dev/tcp/time.nist.gov/13 55103 09-09-29 17:58:55 50 0 0 0.0 UTC(NIST) *
Reads the time in Daytime Protocol (RFC-867) from the NIST Internet Time Service server (documented at tf.nist.gov/service/its.htm).
The Advanced Bash-Scripting Guide includes some more involved examples in chapter 27, covering sending a protocol request, getting web pages, and even UDP use.
Editor's Note: If this does not work for you, make sure to read the comments below, this option is not enabled on all distros (among them, some versions of Ubuntu).
- Papa's Got a Brand New NAS
- Applied Expert Systems, Inc.'s CleverView for TCP/IP on Linux
- Panther MPC, Inc.'s Panther Alpha
- Simplenote, Simply Awesome!
- The Tiny Internet Project, Part III
- GENIVI Alliance's GENIVI Vehicle Simulator
- NethServer: Linux without All That Linux Stuff
- Rogue Wave Software's TotalView for HPC and CodeDynamics
- Sometimes My Office Goes with Me
- Jetico's BestCrypt Container Encryption for Linux