06-29-2013
The spaces are removed by the gsub just before the tolower. Then, as you say, the host= and everything before is stripped off. I'm not sure what the second sub is supposed to do as it is looking for the \) string which does not exist in the line. And, the pattern could/should be anchored at line end using the $ sign.
And yes, it will stop 20 lines after the first search pattern is found.
10 More Discussions You Might Find Interesting
1. AIX
I've just started to explore NIM and I'm looking for additional information on how to set it up and configure it. I've read through the "NIM A-Z" and have many unanswered questions.
One question is how can I have the NIM server pull a mksysb of the clients and can I schedule this to happen... (1 Reply)
Discussion started by: scottsl
1 Replies
2. What is on Your Mind?
Hi,
I am a newbie to Unix, I was introduced to UNIX 8 months back during my Training, I was attracted to Unix as they give complete freedom. I would like to ask how can a OS Admin can go into development field of Unix. Currently I am working in a MNC in Backup- Storage Admin Domain I am... (1 Reply)
Discussion started by: sufi_431
1 Replies
3. Shell Programming and Scripting
Hi guys, I'm learning the ropes of BASH and am doing a few exercises to see if its sinking in but have gotten stuck on something I KNOW is looking at me right in the face but just isn't registering.
I'm creating a script that needs to get specific strings from a line. So using the "ls -l... (9 Replies)
Discussion started by: shadow0001
9 Replies
4. Shell Programming and Scripting
i'm new to shell scripting and have a problem please help me
in the script i have a nawk block which has a variable count
nawk{
.
.
.
count=count+1
print count
}
now i want to access the value of the count variable outside the awk block,like..
s=`expr count / m`
(m is... (5 Replies)
Discussion started by: saniya
5 Replies
5. AIX
I need some guidance on the differences in observations, not sure how significantly different are they.
Also, It would be nice to hear on the values and what the obvious tuning for performance missing.
Observation 1
ending vmstat -v 3948544 memory pages
ending vmstat -v ... (1 Reply)
Discussion started by: Snipper
1 Replies
6. Shell Programming and Scripting
Hey All,
I am newbie on scripting and need some guidance from all the experts here.
I am working on one project where I will check the status/health of around ten (10) solaris 10 servers.
I have one central server from where I have already setup the passwordless SFTP and setup the cron... (1 Reply)
Discussion started by: supercops
1 Replies
7. Shell Programming and Scripting
Hi.. i am running nawk scripts on solaris system to get records of file1 not in file2 and find duplicate records in a while with the following scripts -compare
nawk 'NR==FNR{a++;next;} !a {print"line"FNR $0}' file1 file2duplicate - nawk '{a++}END{for(i in a){if(a-1)print i,a}}' file1in the middle... (12 Replies)
Discussion started by: Abhiraj Singh
12 Replies
8. AIX
Hi There,
I am new to AIX. I am eager to learn the AIX System administration or if there is any other prerequisite before this. Please can anyone help me or guide how to start with AIX, what all courses and certifications do I need to do. I have basic knowledge of UNIX.
Please guide as I am... (3 Replies)
Discussion started by: rahulat302
3 Replies
9. UNIX for Beginners Questions & Answers
Hello everyone! I am a mechanical engineering student from Brazil, and I'm trying to get into numerical simulation in fluid dynamics.
A teacher recommended OpenFoam and from what I've been reading, it seems that I need to get familiar with ''the Shell'' at first, and this is why I'm here. I... (2 Replies)
Discussion started by: Heisenflower
2 Replies
10. Shell Programming and Scripting
Not every server I use has bash so I wanted to add an option to check if bash exists. This is what I tried. This is the error message it gives "-bash: '". It works before I add the and option.
if ; then
echo hi
source ~/.bashrc;
fi (6 Replies)
Discussion started by: cokedude
6 Replies
LEARN ABOUT REDHAT
pcregrep
PCREGREP(1) General Commands Manual PCREGREP(1)
NAME
pcregrep - a grep with Perl-compatible regular expressions.
SYNOPSIS
pcregrep [-Vcfhilnrsvx] pattern [file] ...
DESCRIPTION
pcregrep searches files for character patterns, in the same way as other grep commands do, but it uses the PCRE regular expression library
to support patterns that are compatible with the regular expressions of Perl 5. See pcre(3) for a full description of syntax and semantics.
If no files are specified, pcregrep reads the standard input. By default, each line that matches the pattern is copied to the standard out-
put, and if there is more than one file, the file name is printed before each line of output. However, there are options that can change
how pcregrep behaves.
Lines are limited to BUFSIZ characters. BUFSIZ is defined in <stdio.h>. The newline character is removed from the end of each line before
it is matched against the pattern.
OPTIONS
-V Write the version number of the PCRE library being used to the standard error stream.
-c Do not print individual lines; instead just print a count of the number of lines that would otherwise have been printed. If sev-
eral files are given, a count is printed for each of them.
-ffilename
Read patterns from the file, one per line, and match all patterns against each line. There is a maximum of 100 patterns. Trailing
white space is removed, and blank lines are ignored. An empty file contains no patterns and therefore matches nothing.
-h Suppress printing of filenames when searching multiple files.
-i Ignore upper/lower case distinctions during comparisons.
-l Instead of printing lines from the files, just print the names of the files containing lines that would have been printed. Each
file name is printed once, on a separate line.
-n Precede each line by its line number in the file.
-r If any file is a directory, recursively scan the files it contains. Without -r a directory is scanned as a normal file.
-s Work silently, that is, display nothing except error messages. The exit status indicates whether any matches were found.
-v Invert the sense of the match, so that lines which do not match the pattern are now the ones that are found.
-x Force the pattern to be anchored (it must start matching at the beginning of the line) and in addition, require it to match the
entire line. This is equivalent to having ^ and $ characters at the start and end of each alternative branch in the regular
expression.
SEE ALSO
pcre(3), Perl 5 documentation
DIAGNOSTICS
Exit status is 0 if any matches were found, 1 if no matches were found, and 2 for syntax errors or inacessible files (even if matches were
found).
AUTHOR
Philip Hazel <ph10@cam.ac.uk>
Last updated: 15 August 2001
Copyright (c) 1997-2001 University of Cambridge.
PCREGREP(1)