Hi,
I have a fixed length file where I need to verify the values of 3 different fields, where each field will have a different value.
How can I do that in a single step. (6 Replies)
Hello everyone,
I have been struggling with the following situation, I think I am doing something wrong, can anyone help?
I have 2 comma separated files, the first is a look-up table that will supply the phone number based on the customer id, the second is a file containing customers and their... (4 Replies)
Dear all,
I want to find a number in exact column but I don't know how to do it.
Here is the thing, data is shown below, and I want to find 416 in the first column and print it out, how should I deal with it? Thank you very much!
ab33 50S01S 958 279.068999 67.251013 -150.172544 67.250000... (5 Replies)
I have logs files which are generated each day depending on how many processes are running. Some days it could spin up 30 processes. Other days it could spin up 50. The log files all have the same pattern with the number being the different factor. e.g.
LOG_FILE_1.log
LOG_FILE_2.log etc etc
... (2 Replies)
Hello,
I am writing a script in awk where I need to match a whole word that is stored inside a variable.
For example:
I am working on a text that looks like this, and I want to print the second row:
sfasfsomethingsfasf
this is something I can use
this is not somethingIcanuse
... (12 Replies)
Hi,
My input files is like this
axis1 0 1 10
axis2 0 1 5
axis1 1 2 -4
axis2 2 3 -3
axis1 3 4 5
axis2 3 4 -1
axis1 4 5 -6
axis2 4 5 1
Now, these are my following tasks
1. Print a first column for every two rows that has the same value followed by a string.
2. Match on the... (3 Replies)
Hello,
in a AIX system : AIX CDRATE01 2 7 00FAB3114C00
my following commande give the result :
LISTE /tmp/RESS
****************************************************************
Liste
TYPE = XXXXXXX
EX = YYYY
VER ... (13 Replies)
I have a multicolumn text file with header in the first row like this
The headers are stored in an array called . which contains I want to search for each elements of this array from that multicolumn text file. And I am using this awk approach
for ii in ${hdr}
do
gawk -vcol="$ii" -F... (1 Reply)
Discussion started by: Atta
1 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)