After the beginners guide, the Advanced Bash Scripting Guide is a good read however be warned that some information and examples found there, such as the first couple in the /dev section, might be OS ...
$ 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 ...
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