12-30-2010
Not sure how easy it will be to master. I would say, the more you practice, the more you will learn. There are lots of stuff on internet. To solve complex sed problems, regular expression also should be learned well.
The Grymoire - home for UNIX wizards
Sed Tips and Tricks (link removed)
OpenGroup Sed
OpenGroup Regular Expressions
I find this website best if you really want to learn something in unix well. Just spend some time, look for different ongoing questions/discussions on topics you are interested (search old discussions and go through them), participate, follow the experts. I always find something new to learn here almost everyday.
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suppose u have a file
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output shud be like that
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LEARN ABOUT REDHAT
httppower
httppower(8) powerman httppower(8)
NAME
httppower - communicate with HTTP based power distribution units
SYNOPSIS
httppower [--url URL]
DESCRIPTION
httppower is a helper program for powerman which enables it to communicate with HTTP based power distribution units. It is run interac-
tively by the powerman daemon.
OPTIONS
-u, --url URL
Set the base URL.
INTERACTIVE COMMANDS
The following commands are accepted at the httppower> prompt:
auth user:pass
Authenticate to the base URL with specified user and password, using ``basic'' HTTP authentication which sends the user and password
over the network in plain text.
seturl URL
Set the base URL. Overrides the command line option.
get [URL-suffix]
Send an HTTP GET to the base URL with the optional URL-suffix appended.
post [URL-suffix] key=val[&key=val]...
Send an HTTP POST to the base URL with the optional URL-suffix appended, and key-value pairs as argument.
FILES
/usr/sbin/httppower
/etc/powerman/powerman.conf
ORIGIN
PowerMan was originally developed by Andrew Uselton on LLNL's Linux clusters. This software is open source and distributed under the terms
of the GNU GPL.
SEE ALSO
powerman(1), powermand(8), httppower(8), plmpower(8), vpcd(8), powerman.conf(5), powerman.dev(5), powerman-devices(7).
http://sourceforge.net/projects/powerman
powerman-2.3.5 2009-02-09 httppower(8)