04-10-2012
Agama, can you explain the lines of code? How does it know to stop searching at bicycle? Should the bar part of your code be bicycle?
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi All,
How can i use the file for printing in awk
file1
----------
update table crn_ras_disc_dtl a set a.a5=$1,a.a1=$2,a.a2=$3,a.a3=$4,a.a4=$5;
file2
--------
10|KUMAR|23|MALE|US
20|RAJ|24|MALE|AU
Output
---------
update table crn_ras_disc_dtl a set... (12 Replies)
Discussion started by: cskumar
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2. Shell Programming and Scripting
line_no=6
echo 'Phone,' `awk 'NR==$line_no{print;exit}' <filename>`
what is the error in this..
it says..
awk: Field $() is not correct.
The input line number is 1. The file is <filename>.
The source line number is 1.
i want to print the data in the $line_no line of a certain... (2 Replies)
Discussion started by: St.Fartatric
2 Replies
3. Shell Programming and Scripting
I'm a bit stuck in getting variable from awk to shell. I tried searching but most of them showing to assign to shell variable via..
VAR=`echo $line | awk -F: '{print $1}'`
which is correct ofcourse
My problem is multiple assignments of variable like this one. The above solution will give... (10 Replies)
Discussion started by: ryandegreat25
10 Replies
4. Shell Programming and Scripting
Dear All,
we have a command output which looks like :
Total 200 queues in 30000 Kbytes
and we're going to get "200" and "30000" for further process. currently, i'm using :
numA=echo $OUTPUT | awk '{print $2}'
numB=echo $OUTPUT | awk '{print $5}'
my question is : can I use just one... (4 Replies)
Discussion started by: tiger2000
4 Replies
5. Shell Programming and Scripting
In awk script,
#!/bin/sh
awk 'BEGIN{i=0;}{i=i+5;}END{print i}' in.txt
vr=0;
vr=$i;
echo "$vr"
How can i assign that value of i in $vr(variable) of shell script? (7 Replies)
Discussion started by: cola
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6. Shell Programming and Scripting
I have 3 files and each contain m*n matrix.
m = number of rows (horizontal lines)
n = number of columns (entries in a particular line)
What I wish to find is the sum of the 2nd number in the last row.
Ex
file1.dat
2 5 8 8
4 6 7 8
3 8 3 7
file2.dat
3 4 1 4
8 4 0 3
4 7 3 7
... (3 Replies)
Discussion started by: dynamics
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7. Shell Programming and Scripting
Trying to do something like this
ls -lrt | awk '$9=="test5"'
-rw-r--r-- 1 lrmq db2iadm1 381 Sep 20 21:56 test5
But now, I need to give a variable in place of test5. For example let's define x as test5
x=test5
ls -lrt | awk '$9=="$x"'
This doesn't seem to be working. It doesn't take the... (4 Replies)
Discussion started by: blazer789
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8. Shell Programming and Scripting
I am reasonably capable with awk and its quirks, but not with shell weirdness. This has to be Bourne Shell for portability reasons. I have an awk program that is working just fine; it handles multiple input streams and produces several reports, based on the request (-v Variables). In addition... (3 Replies)
Discussion started by: DerekAsirvadem
3 Replies
9. Shell Programming and Scripting
I want to split one file input.tab into two separate ones, odd lines to input_reads1.txt, even lines to input_reads2.txt for a serial of files with similar name pattern. Also I want to "match" input/output file names to keep consistency of file name:
CSEL_02.0_input.tab
CSEL_03.4_input.tab... (2 Replies)
Discussion started by: yifangt
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10. UNIX for Beginners Questions & Answers
I have the following script, and I want to assign the output ($10 and $5) from awk to N and L:
grdinfo data.grd | awk '{print $10,$5}'| read N L
output from gridinfo data.grd is: data.grd 50 100 41 82 -2796 6944 0.016 0.016 3001 2461. where N and L is suppose to be 3001 and 100. I use... (8 Replies)
Discussion started by: geomarine
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LEARN ABOUT DEBIAN
shell-quote
SHELL-QUOTE(1p) User Contributed Perl Documentation SHELL-QUOTE(1p)
NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$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)