Hi Friends,
Can any of you explain me about the below line of code?
mn_code=`env|grep "..mn"|awk -F"=" '{print $2}'`
Im not able to understand, what exactly it is doing :confused:
Any help would be useful for me.
Lokesha (4 Replies)
HI Friends,
I am trying to elliminate the " " characters from the word:
"hello" using awk. I need the output to be just = hello (without " " chars). Is there any way to do this ?
Thanks! (3 Replies)
Hi All,
I'm trying to write a ksh script to parse a file. When the "\" character is encountered, it should be removed and the next line should be concatenated with the current line. For example...
this is a test
line #1\
should be concatenated with line #2\
and line number 3
when this... (3 Replies)
Hi All,
From the title you may know that this question has been asked several times and I have done lot of Googling on this.
I have a Wikipedia dump file in XML format. All the contents are in one XML file i.e. all different topics have been put in one XML file. Now I need to separate them and... (1 Reply)
Hi,
I have line in input file as below:
3G_CENTRAL;INDONESIA_(M)_TELKOMSEL;SPECIAL_WORLD_GRP_7_FA_2_TELKOMSEL
My expected output for line in the file must be :
"1-Radon1-cMOC_deg"|"LDIndex"|"3G_CENTRAL|INDONESIA_(M)_TELKOMSEL"|LAST|"SPECIAL_WORLD_GRP_7_FA_2_TELKOMSEL"
Can someone... (7 Replies)
Hello All,
I have an Expect script that ssh's to a remote server and runs some commands before exiting.
One of the commands I run is the "hostname" Command. After I run this command I save the output
using this line in the code below...
Basically it executes the hostname command, then I... (2 Replies)
Why does this search give different result in awk
I do see a mix of this in the example around the net.
What to use and why?
data
1 = red
2 = green
3 = blue
4 = black
awk '$3 == /blue/' data
"no result"
awk '$3 == "blue"' data
3 = blue
awk '$3 ~ /blue/' data
3 = blue (9 Replies)
Hi Everybody! First post! Totally noobie.
I'm using the terminal to read a poorly formatted book.
The text file contains, in the middle of paragraphs, hyphenation to split words that are supposed to be on multiple pages. It looks ve -- ry much like this.
I was hoping to use grep -v " -- "... (5 Replies)
Hey Guys,
Earlier I asked a question under Solaris, which I got great help... thanks.
Although I got the script working for what it really needed to do, I am looking for a bit of help to change the output for nicer reading.
my script gets a list of zones under a global-zone and puts this... (4 Replies)
I am hoping to pull multiple strings from one file and use them to search within a block of text within another file.
File 1PS001,001 HLK
PS002,004 MWQ
PS004,002 RXM
PS004,006 DBX
PS004,006 SBR
PS005,007 ML
PS005,009 DBR
PS005,011 MR
PS005,012 SBR
PS006,003 RXM
PS006,003 >SJ
PS006,010... (11 Replies)
Discussion started by: jvoot
11 Replies
LEARN ABOUT CENTOS
shell-quote
SHELL-QUOTE(1) User Contributed Perl Documentation SHELL-QUOTE(1)NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$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)