Solved

simple question

Posted on 2000-04-27
1
175 Views
Last Modified: 2010-03-05
say that i want to change all pentium into pentiumpro in a file. Then i can do.

#!/usr/bin/perl

while (<>) {
   $_ =~ s/pentium/pentiumpro/g;
   print $_;
}

and run the scriot like ./script.pl oginal-txt > new.txt

But how can I do that at the comandline with perl?

I also wounder how i can replace the word in the orginal txt whitout having to redirect the output to a new file.
0
Comment
Question by:pucko
1 Comment
 
LVL 3

Accepted Solution

by:
monas earned 50 total points
ID: 2759116
perl -i -p -e 's/pentium/pentiumpro/g' file1 file2 file3 and so on

command line switches:
-i make changes "inplace" (actually creating a new file and renaming it to the old one when finished)
-e  code to run
-p run code for every line in the input AND print $_ when code is done.

Hope this helps
0

Featured Post

Are your AD admin tools letting you down?

Managing Active Directory can get complicated.  Often, the native tools for managing AD are just not up to the task.  The largest Active Directory installations in the world have relied on one tool to manage their day-to-day administration tasks: Hyena. Start your trial today.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Many time we need to work with multiple files all together. If its windows system then we can use some GUI based editor to accomplish our task. But what if you are on putty or have only CLI(Command Line Interface) as an option to  edit your files. I…
There are many situations when we need to display the data in sorted order. For example: Student details by name or by rank or by total marks etc. If you are working on data driven based projects then you will use sorting techniques very frequently.…
Explain concepts important to validation of email addresses with regular expressions. Applies to most languages/tools that uses regular expressions. Consider email address RFCs: Look at HTML5 form input element (with type=email) regex pattern: T…
With Secure Portal Encryption, the recipient is sent a link to their email address directing them to the email laundry delivery page. From there, the recipient will be required to enter a user name and password to enter the page. Once the recipient …

777 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question