07-03-2012
perl script to find, write, repeat...
I am a novice writing perl scripts so I'd appreciate any help you guys can offer.
I have a list of 100 words in a file (words.txt) and I need to find them in a second file (data.txt). Whenever one of these words is found I need to write that line to a third file (out.txt) and then continue searching for more matches. I've tried using grep, and it works fine for just doing one word at a time, but it is completely unworkable once I try to do all of them. Anyway, I thought a perl script might be the way to go but I'm completely stumped as to where to start.
Thanks!
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hello friends
I have to write a script in linux to find out the website is up or down.....
Please help me in this
thank you
Jay (1 Reply)
Discussion started by: jai143
1 Replies
2. Shell Programming and Scripting
Hello friends,
I am having a awk script which does my goal , but I want to learn perl , after learning the basics in perl now I am trying to convert my nawk script to perl .
Please help me to do some task in perl that I ve already did in nawk.
Like I am facing some problem in... (10 Replies)
Discussion started by: user_prady
10 Replies
3. UNIX for Dummies Questions & Answers
Hello,
I have done some BASIC shell scripting/PERL scripting before so I am familiar with the languages. I am not really sure which one would lend itself better to the application I have to write.
I am required to scan the message logs for possible break in attempts. If I use shell scripting... (2 Replies)
Discussion started by: mojoman
2 Replies
4. Homework & Coursework Questions
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data:
I must write a shell script that calls two external Perl functions--one of which sorts the data in a file, and... (6 Replies)
Discussion started by: kowit010
6 Replies
5. Shell Programming and Scripting
can any one suggest me on how to write a update query in perl script for Oracle database and also tell me abt how we can write a code for sending mails with report as attachment to appropriate persons? (1 Reply)
Discussion started by: Ramesh V Kumar
1 Replies
6. Shell Programming and Scripting
Hi,
I have on Designdocument in that information is stored with in tabular format.I need Perlscript to read and write the datausing perl script?
Regards,
Ravi (0 Replies)
Discussion started by: toravi.pentaho
0 Replies
7. Shell Programming and Scripting
Hi,
I have on Designdocument in that information is stored with in tabular format.I need Perl/unix script to read and write the data
using perl script?
Regards,
Ravi (4 Replies)
Discussion started by: toravi.pentaho
4 Replies
8. Shell Programming and Scripting
Hi,
I need help in debug following script. can somebody help....!!!
#!/usr/bin/perl -w
use strict;
use Spreadsheet::WriteExcel;
# Create a new workbook called simple.xls and add a worksheet.
my $workbook = Spreadsheet::WriteExcel->new('simple.xls');
my $worksheet =... (1 Reply)
Discussion started by: chettyravi
1 Replies
9. Shell Programming and Scripting
Hi ,
I got the following script from internet to display queue depth using Perl Script. However, when I execute it , im getting following error. Can anyone shed light on what is going wrong?
#!/usr/bin/perl
## 07/23/01
## Depth Inquiry sample program.
## Arguments:
## Connects to... (11 Replies)
Discussion started by: srkmish
11 Replies
10. Shell Programming and Scripting
In the file below I am trying to count the given repeats of A,T,C,G in each string of letters. Each sequence is below the > and it is possible for a string of repeats to wrap from the line above. For example, in the first line the last letter is a T and the next lines has 3 more. I think the below... (10 Replies)
Discussion started by: cmccabe
10 Replies
PIDOF(8) Linux System Administrator's Manual PIDOF(8)
NAME
pidof -- find the process ID of a running program.
SYNOPSIS
pidof [-s] [-c] [-n] [-x] [-o omitpid[,omitpid..]] [-o omitpid[,omitpid..]..] program [program..]
DESCRIPTION
Pidof finds the process id's (pids) of the named programs. It prints those id's on the standard output. This program is on some systems
used in run-level change scripts, especially when the system has a System-V like rc structure. In that case these scripts are located in
/etc/rc?.d, where ? is the runlevel. If the system has a start-stop-daemon (8) program that should be used instead.
OPTIONS
-s Single shot - this instructs the program to only return one pid.
-c Only return process ids that are running with the same root directory. This option is ignored for non-root users, as they will be
unable to check the current root directory of processes they do not own.
-n Avoid stat(2) system function call on all binaries which are located on network based file systems like NFS. Instead of using this
option the the variable PIDOF_NETFS may be set and exported.
-x Scripts too - this causes the program to also return process id's of shells running the named scripts.
-o omitpid
Tells pidof to omit processes with that process id. The special pid %PPID can be used to name the parent process of the pidof pro-
gram, in other words the calling shell or shell script.
EXIT STATUS
0 At least one program was found with the requested name.
1 No program was found with the requested name.
NOTES
pidof is actually the same program as killall5; the program behaves according to the name under which it is called.
When pidof is invoked with a full pathname to the program it should find the pid of, it is reasonably safe. Otherwise it is possible that
it returns pids of running programs that happen to have the same name as the program you're after but are actually other programs. Note
that that the executable name of running processes is calculated with readlink(2), so symbolic links to executables will also match.
SEE ALSO
shutdown(8), init(8), halt(8), reboot(8), killall5(8)
AUTHOR
Miquel van Smoorenburg, miquels@cistron.nl
01 Sep 1998 PIDOF(8)