Goal: for each hostname (mars, phobos, and deimos grab the value of state = in a variable so I work on it further.
I figured I'll need to use sed to find the target host name, then substitute the "linefeed and what I am assuming is a tab state =" to null and grab the state (in this case "free") into a variable. What I don't know how to do is: see the output of the command showing all non-printable characters so I can setup a grep or sed line. How is this accomplished in bash?
I am relatively new to *nix and have set up a small home network with a red hat server, what i would like to do is write a small script to check to see if a computer is connected by using the ip address of the computer. can get the ping to return but cant get the echo line working. the output i... (3 Replies)
Hi all,
I am a newbie to unix programming using C..
So i would like to have a few simple C programs to start off with..
I wanted programs on learning ,
abort,kill and raise,alarm and pause,I would also like to know how to use the vfork() in a prg
It would be really great if i can have... (1 Reply)
As per another thread - https://www.unix.com/shell-programming-scripting/81027-how-can-i-parse-xml-file-2.html
I am using the following to extract the Subaccid and RecAccTotal from the xm file below
awk -v v=SubaccId -F'' '$2==v{s=$3;getline;a+=$3}END {for (i in a)print v,i,a}' file
Can... (6 Replies)
I have access to a large unix parallel computing cluster. To submit jobs I simply run a script called "submit" followed by options relevant to that particular job. Very simple and easy, "submit" can be run from any directory.
I am trying to make a batch file that automatically runs "submit"... (5 Replies)
Hi guys ,
This is the first time i m running java application inside linux.
i have installed jdk-6u20-linux-i586-rpm.bin jre-6u20-linux-i586-rpm.bin in my linux machine.
and set JAVA_HOME and JRE_HOME variables respectively.
# echo $JAVA_HOME
/usr/java/jdk1.6.0_20/
# echo $JRE_HOME... (6 Replies)
i need one help, below is one more xml file with diff pattern i tried it but dint get it , iam sure its a peice of cake for you guys.
<xn:MeContext id="LSVLKY001">
<xn:ManagedElement id="1">
<un:RncFunction id="1">
<un:UtranCell... (2 Replies)
Good Day All,
I need your urgent support to get the following script (bash), (it should be as simple as possible please) :
The script will check the .csv file( attached example)
The script will generated 3 files from the initial one.
The script must check one field “NEType”, and then ... (2 Replies)
if ]; then
echo "successssssssssssssssssss"
$filename = "<font color='red'>$i</font>"
else
echo "failureeeeeeeeeeeeeeeeeeeee"
$filename = "$i"
fi;
I'm just trying to see is this - read a file name and highlight... (2 Replies)
but I'm stumped...please help
I have a file like this.......
1000 1 34
1000 10 34
1000 11 35
1000 20 35
1000 21 36
1000 30 36
2000 1 34
2000 10 34
which I would like printed out as 40 lines
1000 1 34
1000 2 34
1000 3 34
1000 4 ... (2 Replies)
Discussion started by: garethsays
2 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)