02-09-2013
Quote:
Originally Posted by
Scrutinizer
@user8: not every awk retains the fields in the END section.
You are right. I should have mentioned this.
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1. Shell Programming and Scripting
Hi,
I want to write a shell script which increments a particular column in a row from a text file and then adds another row below the current row with the incremented value .
For Eg .
if the input file has a row :
abc xyz lmn 89 lm nk o p
I would like the script to create something like... (9 Replies)
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2. Shell Programming and Scripting
Hello,
I have an input file like the following:
11_3_4
2_1_35
3_15__
_16989
Where '_' is a space. The data is in a table. Is there a way for the program to prompt the user for x1,y1 and x2,y2, where x1,y1 is the desired number (for example x=6 y=4 is a value of 4) and move to a desired spot... (2 Replies)
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3. Shell Programming and Scripting
Hi, Please read the whole thread.
I have been working on this script below. It works fine, feel free to copy and test with the INPUT File below as well.
example:
PACKET DATA PROTOCOL CONTEXT DATA
APNID PDPADD EQOSID VPAA PDPCH PDPTY PDPID
10 ... (6 Replies)
Discussion started by: panapty
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4. Shell Programming and Scripting
Hi Friends,
I have a single column data like below.
1
2
3
4
5
I need the output like below.
0
1
2
3
4
where each row (including first row) subtracting from first row and the result should print below like the way shown in output file.
Thanks
Sid (11 Replies)
Discussion started by: ks_reddy
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5. Shell Programming and Scripting
Hi all
I have file with columns
F3 pathway CPS
F2
H2
H4
H5
H6 no pathway CMP
H7
H8
H9
H10
My expected output is
F3 pathway CPS
F2 pathway CPS (10 Replies)
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6. Shell Programming and Scripting
Is it possible to remove redundant names in the 4th column?
input
cqWE 100 200 singapore;singapore
AZO 300 400 brazil;america;germany;ireland;germany
....
....
output
cqWE 100 200 singapore
AZO 300 400 brazil;america;germany;ireland (4 Replies)
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7. Shell Programming and Scripting
Hi,
I have the following file,
chr1 100 200 20
chr1 201 300 22
chr1 220 345 23
chr1 230 456 33.5
chr1 243 567 90
chr1 345 600 20
chr1 430 619 21.78
chr1 870 910 112.3
chr1 914 920 12
chr1 930 999 13
My output would be
peak1 20 22 23 33.5 90
peak2 20 21.78 112.3 12 13
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8. Shell Programming and Scripting
Dear All,
I have input :
SEG901 5173 9005 5740
SEG902 5227 5284
SEG903 5284 5346
SEG904 5346 9010
SEG905 5400 5456
SEG906 5456 5511
SEG907 5511 9011
SEG908 5572 9015
SEG909 5622 9020
SEG910 5678 5739
SEG911 5739 5796
SEG912 5796 9025 ... (3 Replies)
Discussion started by: attila
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9. Shell Programming and Scripting
I have a table with this structure:
cola colb colc
1 19 lemon
20 31 lemon
32 100 lemon
159 205 cherries
210 500 cherries
and need to parse it into this format:
cola colb colc
1 100 lemon
159 500 cherries
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10. Shell Programming and Scripting
Hi,
I have a comma separated file. I would like to print every alternate columns into a new row.
Example input file:
Name : John, Age : 30, DOB : 30-Oct-2018
Example output:
Name,Age,DOB
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Discussion started by: Lini
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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)