Here's what I wrote:
#!/bin/sh
d1=`grep Dialtone dialtone | awk '{print $2, $3, $4, $5, $6, $7, $8, $9}'`
d2=`grep pstsys dialtone | awk '{print $12}'`
echo "$d1 $d2"
I expected the result to be this:
Dialtone on host 1 slot 13 port 1, pstsys05
Dialtone on host 1 slot 13 port 1,... (3 Replies)
ok. this is a bit of a difficult question but i've been trying to figure this out for quite some time but couldn't.
how do I print columns on the screen?
like take for instant. using the ls and the file command, how do i print it so i can have the filenames on the left hand side and the... (3 Replies)
I am piping an "ls -l" to awk so that all it returns is the file size, date, and file name. The problem is that some files may have spaces in the name so awk is only printing the first word in the file name. I won't know how many space-delimited words are in the filename, so what I want to do is... (2 Replies)
How can I use Perl to a take a string of 10 characters and print the last five characters of the string in columns 1-5 and the first five in columns 6-10?
Result:
0123456789
5 0
6 1
7 2
8 3
9 4 (5 Replies)
Im using awk to print columns. Basically I have a file with like 500 columns and I want to print the 200th-300th column and ignore the rest... how would I do it without putting $200, $201 .... $300
thanks (6 Replies)
Gurus,
I have one file which is having multiple columns and also this file is not always contain the exact columns; sometimes it contains 5 columns or 12 columns. Now, I need to find the difference from that particular file. Here is the sample file:
param1 | 10 | 20 | 30 |
param2 | 10 |... (6 Replies)
Hi everyone,
I have been working on a pretty laborious shellscript (with bash) the last couple weeks that parses my firewall policies (from a Juniper) for me and creates a nifty little columned output. It does so using awk on a line by line basis to pull out the appropriate pieces of each... (4 Replies)
Hi Gurus,
I want to extract certain columns from file 2 and combine with file 1.
I am using the following script to extract the columns.
$ awk 'FNR>1{print $2, $9, FILENAME}' *.lim > out1
However, this script does not print the titles of the columns 2 and 9.
Can somebody help me in... (1 Reply)
Hi,
I have a tab delimited text file with three columns:
Input:
1 25734 25737
1 32719 32724
1 59339 59342
1 59512 59513
1 621740 621745
For each row of the text file I want to print out all the values between the second and third columns, including them. The... (3 Replies)
Hi,
I need just to print the values of second and fourth column from a file
# cat dispaly
id Name Std Specialist
1 sss X mathematics
2 uyt IX geography
3 vcd X English
i tried with some NF command.. I think am wrong.. Is there anyother way to print my requirement (3 Replies)
Discussion started by: Priya Amaresh
3 Replies
LEARN ABOUT DEBIAN
shell-quote
SHELL-QUOTE(1p) User Contributed Perl Documentation SHELL-QUOTE(1p)NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$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 v5.8.4 2005-05-03 SHELL-QUOTE(1p)