When i am trying to
$uncompress tress.dmp.Z
I am getting tress.dmp.Z permission denied.
What action i have to perform to unzip or uncompress
It has rw-r--r-- permissions
When i am trying to change the permissions chmod 744 it says.
chmod: Warning: can't change tress.dmp.Z
Just... (1 Reply)
hi,
how can i saerch for foll pattern
the line contains many entries:
xxx xxxx ddd ffff gggg 30%
rr eeee eeee rrrr rrrr 100%
rr eeee eeee rrrr rrrr 43%
how can i display lines having size greater than 40%?what pattern shud i use in grep?
thanks!
regards
vivek.s (1 Reply)
There is problem in my system whenever i run a command lsattr -El mem0 it shows 3gb memory and when i run lscfg -vp | grep Size it shows 8 modules of 512 mb. it means it shows 4 gb how is it possible. (1 Reply)
Hi all
I am getting the following error when i execute my cronjob :
stty: : No such device or address
stty: : No such device or address
What could be the problem.
Thanks
Rahul (3 Replies)
Hi all,
i want mount directory with permission
#NFS Server = FreeBSD
/etc/export =
/data -alldirs -network 192.168.0.0 -mask 255.255.255.0
#NFS Client = Ubuntu
192.168.0.8:/data /dir nfs intr
but i m unable to create folder in /dir
whts the wrong?
Please... (4 Replies)
my sample is
01012007
01022007
02022007
01032007
20022007
02032007
01092007
05022007
30022007
which is date in ddmmccyy format
i try to sort
like this
sort -n +0.2 -0.5 +0.0 -0.3 file
but the results are not correct
pls help...... (3 Replies)
# mount /dev/dsk/c1d1s1 /mnt
mount: /dev/dsk/c1d1s1 is not this fstype
I tried to mount the above raw patition and it gave an error. but can someone help (3 Replies)
Hi,
I have downloaded as86-0.16.17.tar file. When I umcompressed it I found it consisting of C source and header files. How can i create an executable for compiling assembly programs. Kindly help me with this. I am working on windows XP professional and system is HP DX 2700.
Zulfi. (0 Replies)
hi could some body help me?
im making a program that writes in a file.txt
how can i compare my "char x" to another char?
#include<iostream>
#include<fstream>
#include<string.h>
using namespace std;
int main()
{
char x;
char y;
cout << "enter title" << endl; (0 Replies)
Discussion started by: rave03
0 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)