I need to look at a log file every half hour or so to make sure that some activity is going on there. I thought I would write a quick PERL script that would copy the current log file to the temp directory, compare it to the previous log file (from 30 minutes ago) and exit with an error status if... (1 Reply)
Hi!
I have a need to do this in Perl.
script.pl -config file
The script would be doing a wget/LWP on a URL which is defined in the config file.
So when I run the script it should return either one of these conditions -
1) OK with exit status 0.
Should also print "wget URL"
2)... (6 Replies)
hi guys
i have this very messy script, that looks in /var/log/messages.all for an error and reports if it finds the key works
how can i get it to look at more then one file, i.e /var/log/message.all *
so it looks in old logs as well
thanks
exit 0 if (isRenderNode(hostname));
my... (4 Replies)
Hello everyone, I need to write a shell script for a file consisting of 3 columns, first column is frequency the second one is power and the last one is number of occurence. I basically need to get the power and the frequency corresponding to the highest number of occurrence number. Below is the... (6 Replies)
Hi All,
I ahve requirement where I want to put the text file in into proper format. I am wondering how can i achieve that:-
Host/Alias Name IP Address Resolved
sinuiy01.infra.go2uti.com 10.240.8.158 N
sinuid20.devtst.go2uti.com 10.240.8.230 N
sinuid21.devtst.go2uti.com... (6 Replies)
Hi All,
I have the below text file from which I have to cut particular section starting from PTR_Security_Rpeorting.cpf to PTR_Security_Reporting_Env93_export.
Report Model............: "D:\Cognos_Publishing\tmp.a2R94KLQec"\PTR_Security_Reporting.cpf
Report Output Script....:... (4 Replies)
Hi,
I need to compare 2 text files with around 60000 rows and 1 column. I need to compare these and write the mismatch data to 3rd file.
File1 - file2 = file3
wc -l file1.txt
58112
wc -l file2.txt
55260
head -5 file1.txt
101214200123
101214700300
101250030067
101214100500... (10 Replies)
Is it possible to replace a line of text within a file while it's closed with a single command or a script? Please show me an example or point me to a webpage that shows an example. The file has this line of text:
LoginGraceTime 100
I want to replace it with the following:
... (2 Replies)
Hi,
I want to compare two columns from file1 with another two column of file2 and print matched and unmatched column like this
File1
1 rs1 abc
3 rs4 xyz
1 rs3 stu
File2
1 kkk rs1 AA 10
1 aaa rs2 DD 20
1 ccc ... (2 Replies)
Hello again,
I have put together a shell script using sed and some shell commands, and it runs pretty well when I am in terminal, but when I save it as a text file and invoke it through the terminal by typing its path, all I get are errors.
Can some one give me some hints as to what I am doing... (13 Replies)
Discussion started by: Paul Walker
13 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)