I have the results of a grep with -n store in a shell variable
ie
VAR=`grep -n -e 'PATTERN' file`
How ever I am missing the line breaks in the variable , How do I store the resualts of grep with many lines in to a variables. I want the varable should be the sawmway as we do the grep
grep... (3 Replies)
I have a variable A
echo $A
5060
I am exporting the value X,Y,Z and it id fetching right thing and When I run
C=`${X} -l ${Y} ${Z} "trap '' INT;. ~/.profile >/dev/null 2>/dev/null; netstat -na | grep \$A`"
here it is going to same directory and also running netstat -na | grep 5060
... (4 Replies)
Hello,
I have a question regarding the awk command. Here is the line I need to grep:
1 F= -.13250138E+03 E0= -.13249556E+03 d E =-.174650E-01 mag= 35.2157
Instead of displaying the number in red I would like to store it as a variable such as X. Is there a way to do this? Thanks for any... (3 Replies)
Hi,
I have a file contains attribute value pair like..
..name=erick rollno=583.0 pass=recon..
From the above line, i need to grep for only "rollno" and store "rollno=583.0" in a variable.
Pls suggest (6 Replies)
Hi all,
I have a script in which i need to run a command like "/opt/dell/srvadmin/sbin/omreport about" and output will be something like
Version : 6.3.0
Copyright : Copyright (C) xxx Inc. 1995-2010 All rights reserved.
Company : xxx Inc.
In this i need to save the version... (13 Replies)
Hi,
I am trying to do the following thing
var='date'
$var
Above command substitutes date for and in turn runs the date command and i am getting the todays date value.
I am trying to do the same thing as following, but facing some problems,
unique_host_pro="sed -e ' /#/d'... (3 Replies)
Guys, I was wondering what command can be used to parse the "LaxOrdID" field into a separate file? These messages are in thousands and I need to perform a comparision. (6 Replies)
In a directory i have a file *output* whose contents are changing for every simulation.
zgrep "trace file is" *output* | zgrep g
o/p: trace file is Int_01.1352176388z4f56ec33.0.trace.gz
I want to extract "Int_01.1352176388z4f56ec33.0.trace.gz" from the above result into a variable.
i... (2 Replies)
!#bin/bash
clear
var= grep @gmail.com email.txt | wc -l
echo $var
echo $var
exit 0
OUTPUT:
1000
_
_
Where _ represent space (no value or nothing) (4 Replies)
Discussion started by: Muhammad Rehan
4 Replies
LEARN ABOUT CENTOS
shell-quote
SHELL-QUOTE(1) User Contributed Perl Documentation SHELL-QUOTE(1)NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$SHELL -c". This doesn't work as intended:
ssh host touch 'hi there' # fails
It creates 2 files, hi and there. Instead, do this:
cmd=`shell-quote touch 'hi there'`
ssh host "$cmd"
This gives you just 1 file, hi there.
process find output
It's not ordinarily possible to process an arbitrary list of files output by find with a shell script. Anything you put in $IFS to
split up the output could legitimately be in a file's name. Here's how you can do it using shell-quote:
eval set -- `find -type f -print0 | xargs -0 shell-quote --`
debug shell scripts
shell-quote is better than echo for debugging shell scripts.
debug() {
[ -z "$debug" ] || shell-quote "debug:" "$@"
}
With echo you can't tell the difference between "debug 'foo bar'" and "debug foo bar", but with shell-quote you can.
save a command for later
shell-quote can be used to build up a shell command to run later. Say you want the user to be able to give you switches for a command
you're going to run. If you don't want the switches to be re-evaluated by the shell (which is usually a good idea, else there are
things the user can't pass through), you can do something like this:
user_switches=
while [ $# != 0 ]
do
case x$1 in
x--pass-through)
[ $# -gt 1 ] || die "need an argument for $1"
user_switches="$user_switches "`shell-quote -- "$2"`
shift;;
# process other switches
esac
shift
done
# later
eval "shell-quote some-command $user_switches my args"
OPTIONS --debug
Turn debugging on.
--help
Show the usage message and die.
--version
Show the version number and exit.
AVAILABILITY
The code is licensed under the GNU GPL. Check http://www.argon.org/~roderick/ or CPAN for updated versions.
AUTHOR
Roderick Schertler <roderick@argon.org>
perl v5.16.3 2010-06-11 SHELL-QUOTE(1)