Friends,
I have a data with 3 columns:
30 41 1
39 19 4
14 25 3
....
....
.....
I want to retrieve any data in the first column that is greater 15. What is the best way to do this?
Thanks! (2 Replies)
Hi All,
I am having trouble through, I am reading the input from tab delimited file containing several records,
e.g.
line1 field1 field2 field3 so on..
line2 field1 field2 field3 so on..
..
..
on the basis of certain fields for each record in input file, I have to retrieve... (1 Reply)
Hi
I'm using and Oracle 10g Database.
I want to write a script to retrieve data from the database and store it toa file.
I'm using simple sql statements such as
Select * from celltable
I don't know how to specify the database name etc.
I have this but it doesn't work
... (1 Reply)
Hello everyone,
I am writing a script to process data from the ATP world tour.
I have a file which contains:
t=540 y=2011 r=1 p=N409
t=540 y=2011 r=2 p=N409
t=540 y=2011 r=3 p=N409
t=540 y=2011 r=4 p=N409
t=520 y=2011 r=1 p=N409
t=520 y=2011 r=2 p=N409
t=520 y=2011 r=3 p=N409
The... (4 Replies)
Hello,
I had Gentoo installed on a Microsoft Windows Hyper-V virtual machine. The system shutdown properly but the RAID array on the drive it was on failed. We had a backup that was poorly configured and as such we didn't back up all of the data we needed.
Therefore, after getting the RAID... (0 Replies)
Dear Friends,
I have a file in which lists State and Phone numbers. Does anybody have a solution in which to take the data from col3 and place it on col2?
AK 2988421640 9077467107
AK 2998266711 2069239034
AK 2983804242 2069239034
AK 2960407849
AK ... (3 Replies)
I have input file like
AAA
AAA
CCC
CCC
CCC
EEE
EEE
EEE
EEE
FFF
FFF
GGG
GGG
i was trying to retrieve data between two strings using sed.
sed -n /CCC/,/FFF/p input_file
Am getting output like
CCC
CCC
CCC (22 Replies)
Hello,
I have some tab delimited data and I need to move the last col. I could hard code it,
awk '{ print $1,$NF,$2,$3,$4,etc }' infile > outfile
but it would be nice to know the syntax to print a range cols.
I know in cut you can do,
cut -f 1,4-8,11-
to print fields 1,... (8 Replies)
Hi,
Please help with this.
I have several excel files (with and .xlsx format) with 10-15 columns each.
They all have the same type of data but the columns are not ordered in the same way.
Here is a 3 column example. What I want to do add the alphabet
from column 2 to column 3, provided... (9 Replies)
Hello experts :cool:,
I am new to programming and will need your help.. I have 2 very large files with the following format:
FILE1:
>MLP1019 PL4
>MLP7456 PL3
>MLP9268 PL9
>MLP6245 PL1
FILE2:
>MLP1019
STNAPLQTSNTWVSYQPSMMMSLQ
>MLP7456
PPYWYWNSAVMIFYVQPLSLLAVLLA
>MLP9268... (2 Replies)
Discussion started by: narachaid
2 Replies
LEARN ABOUT CENTOS
shell-quote
SHELL-QUOTE(1) User Contributed Perl Documentation SHELL-QUOTE(1)NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$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)