Hi, there are some servers here at work which issue a Safeword challenge after I login. Can anyone tell me exactly how the challenge/response system works? In particular, how are the valid keys decided? (2 Replies)
Hi Gurus,
I am a starter in ksh scripting
I have a requirment where i need to ucertain that each line contain only 5 occurances of "," (comma) in a CSV file ; I don't want to use perl,is it possible in ksh;; Kindly help
I am going to read CSV file and ; redirect all those lines which are... (3 Replies)
I have the following text
Microsoft iSCSI Initiator version 2.0 Build 3497
Targets List:
iqn.2001-05.com.equallogic:0-8a0906-daef43402-138000002a4477ba-grsrv12-extra
iqn.2001-05.com.equallogic:0-8a0906-986f43402-520000002b447951-exchange
... (9 Replies)
Hi all,
Thanks in advanced.
This question really bothered me much. What i want is to replace any times of repeated 'TB' to 'T', below is example.
It can be fullfil by AWK and perl, but my desire is using SED to realize it.
So here means we treat TB as a whole part, which means 's/TB*/T/'... (4 Replies)
I have a web xml file that looks like this:
<allinfo>
<info>
<a>Name1<\a>
<b>address1<\b>
<c>phone1<c>
<\info>
<info>
<a>Name2<\a>
<b>address2<\b>
<c>phone2<c>
<\info>
<\allinfo>
I want to use sed to... (2 Replies)
Here's a regex substitution operation that has stumped me with sed:
How do you convert lines like this:
first.key ?{x.y.z}
second.key ?{xa.ys.zz.s}
third.key ?{xa.k}
to:
first.key ?{x_y_z}
second.key ?{xa_ys_zz_s}
third.key ?{xa_k}
So i'm basically converting all the... (11 Replies)
Default shell is /usr/bin/zsh
Script will be running #!/bin/bash
Need to pull information from database while using other scripts already made (not by me).
Ok, so i need a script pulling certain information about a customer's router interfaces.
I am using a ROUTER-DNS-NAME as variable $1
I... (3 Replies)
I have a folder with many subdirectories and i need to set the modified date to today for everything in it. Please help, thanks!
I tried something i found online, find . -print0 | xargs -r0 touch
but I got the error: xargs: illegal option -- r (5 Replies)
Ok then i Have a challenge for you :
Give me PS1 so that it always display the least 2 levels of directory
(except if i am above of course)
I want it this way :
so if i go to
/
/home/
/home/user
/home/user/whatever
/home/user/whatever1/whatever2
my PS1 should respectively... (12 Replies)
I have searched through google, and this forum to try and find the answer, but alas, nothing quite hits the whole answer.
I am trying to read the last line (or lines) of some log files. I do this often.
The files are named sequentially, using the date as part of the file name, and appending... (18 Replies)
Discussion started by: BatterBits
18 Replies
LEARN ABOUT CENTOS
shell-quote
SHELL-QUOTE(1) User Contributed Perl Documentation SHELL-QUOTE(1)NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$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)