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Full Discussion: Help needed - UNIX command
Homework and Emergencies Homework & Coursework Questions Help needed - UNIX command Post 303034357 by edujs7 on Tuesday 23rd of April 2019 09:45:24 PM
Old 04-23-2019
Help needed - UNIX command
The 'env' command prints out all of the environment variables and their values.
Come up with a command that prints a list of environment variables whose names
end with either 'NAME', 'DIR' or 'PATH'.

What I've tried.
Code:
$ env | grep '[NAME, DIR, PATH]'

Although it highlights the part of the variables it does not list them as it should. It actually prints the whole lines including the variables. Not sure what I'm missing.

University Of Technology Sydney, Unix Systems Programming
 

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LEARN ABOUT CENTOS

tcp-env

tcp-env(1)                                                    General Commands Manual                                                   tcp-env(1)

NAME

       tcp-env - set up TCP-related environment variables

SYNOPSIS

       tcp-env [ -rR ] [ -ttimeout ] program [ arg ...  ]

DESCRIPTION

       The  input  for  tcp-env  must be a TCP connection.  tcp-env finds out information about that connection, puts the information into several
       environment variables as described in tcp-environ(5), and runs program with the given arguments.

       Usually tcp-env is run from inetd.  It might instead be run from another server that already sets up the right  environment  variables;  if
       PROTO  is  set  to  TCP  when  tcp-env  is invoked, tcp-env assumes that all the other variables are set up properly, and it does not check
       whether the input is a TCP connection.

OPTIONS

       -r     (Default.)  Attempt to obtain TCPREMOTEINFO from the remote host.

       -R     Do not attempt to obtain TCPREMOTEINFO from the remote host.

       -ttimeout
              Give up on the TCPREMOTEINFO connection attempt after timeout seconds.  Default: 30.

SEE ALSO

       tcp-environ(5), inetd(8)

                                                                                                                                        tcp-env(1)
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