02-27-2013
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10 More Discussions You Might Find Interesting
1. UNIX Desktop Questions & Answers
ehe may i know what are the difference between Unix & Linux, and what are the advantages of having Unix as well as disadvantages of having Unix or if u dun mind i am dumb do pls tell me what are the advantages as well as the disadvantages of having linux as well. thanks (1 Reply)
Discussion started by: cybertechmkteo
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2. UNIX Desktop Questions & Answers
Anyone who have any ideas how-to make X faster.
I have a ATI Rage Mobility P/M AGP 2x card and I wanto get it fast, mostly for movie playback and so.
Is there OpenGL and GLX support?
regards
Esaia (1 Reply)
Discussion started by: Esaia
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3. Shell Programming and Scripting
VARIABLE="project"
if && ]
then
echo "VARIABLE is not empty"
fi
this is not working what is wrong in the syntax?? (2 Replies)
Discussion started by: codeman007
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4. UNIX for Dummies Questions & Answers
Hi friends,
I have a script that sets the env variable path based on different conditions.
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Only a new terminal or new shell should have the new path env variable set.
I am able to do this only as follows:
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Discussion started by: sowmya005
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5. Shell Programming and Scripting
Hi, I hope the title does not scare people to look into this thread but it describes roughly what I'm trying to do. I need a solution in PHP.
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Discussion started by: lowmaster
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6. Shell Programming and Scripting
"Both cases have to be true for the expression to evaluate "true". is that not so.
the following code does a read from a txt file, an then suppose to do the deletion ,but although the condition exists, its not performing the deletion
&&
echo "\n\t Deleting printer ${prt} !!!"
if !... (5 Replies)
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7. Shell Programming and Scripting
Hi
What is the syntax for if statement using && and || operator?
if && ] ||
here its giving me an error to this if statement
any suggestion?? (2 Replies)
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8. UNIX for Dummies Questions & Answers
Hello everyone,
on the man page of "magic(5)"
There is explanation
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9. Shell Programming and Scripting
Hi All,
Do you have any sample script,
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- only download specify filename
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... (3 Replies)
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10. UNIX and Linux Applications
Hi Team,
I am facing issue while using Xalan & Xerces for my application.
Below are my environment details i am using :-
Platform:- Oracle Linux 6.6
Compiler :- solarisstudio12.3 C++ compiler for Linux
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Discussion started by: agrachirag
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LEARN ABOUT CENTOS
shell-quote
SHELL-QUOTE(1) User Contributed Perl Documentation SHELL-QUOTE(1)
NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$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)