String Replacement with Perl


Login or Register for Dates, Times and to Reply

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting String Replacement with Perl
# 1  
String Replacement with Perl

I want to replace a string within a file using perl.

We have a line that gets commented out, and I want to replace that line now matter how it was commented out.

for example, I'd want to replace

###ES=PR1A with ES=PR1A

or

##LJW(9/16/26)ES=PR1A with ES=PR1A


I tried: perl -pi -e 's/ES=PR1A\Z/ES=PR1A/' filename

but the comments are not removed.

Thank you in advance for any guidance you can give..

Linda
# 2  
I don't know perl, but could this work?
Code:
perl -pi -e 's/^#*//1' filename

# 3  
Wouldn't that remove the comments from every line?


I just want to remove comments from a line that contains a particular string
# 4  
Woops, my mistake. Try:
Code:
perl -pi -e 's/^#*ES=PR1A/ES=PR1A/1' filename

In any case, what I'm getting at is that with sed, you could do
Code:
echo "#abc
###abc
##abc" | sed 's/^#*abc/abc/1'

# 5  
AHA! worked beautifully.

Thank you so much !
Login or Register for Dates, Times and to Reply

Previous Thread | Next Thread
Thread Tools Search this Thread
Search this Thread:
Advanced Search

Test Your Knowledge in Computers #46
Difficulty: Easy
Regarding computer networking, the exact meaning of the term VPN is 'virtual protected network.'
True or False?

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Perl String Replacement Syntax Question . . .

Greetings! I've been tooling about with Perl to make a few string replacements in some files; and seem to have run into a bit of a squeeze :) Beginning with a simple text file, test.txt, we have the following content to be worked:Now, not wanting to have anyone feel left out, I decided that... (6 Replies)
Discussion started by: LinQ
6 Replies

2. Shell Programming and Scripting

String replacement

Hi, I have a text file where all records come in one line (single line file), each record starts with 'BUCH' and ends with '@&' and if data is not there we get space instead. between '@&' and next record there might be some spaces, now I want to remove those spaces between '@&' and 'BUCH'. ... (4 Replies)
Discussion started by: maks475
4 Replies

3. Shell Programming and Scripting

String replacement.

Dear Friends, I want to replace following line with given line. It should grep/search following string in a file (input.txt) M/M SRNO: 000M/6200-0362498 COSMETIC PRO MALE FEMALE Once found it should replace it to following string. T_DLHNNO: 000M/6200-0362498 ... (7 Replies)
Discussion started by: anushree.a
7 Replies

4. Shell Programming and Scripting

String replacement

Hi All, I have below file which has data in below format. #$ | AB_100 | AB_300 ()| AB_4 @*(% | AB-789 i want o/p as below format. | AB_100 | AB_300 | AB_4 | AB-789 So here there is no standard format. How we can achieve the same in unix ? Regards, (3 Replies)
Discussion started by: gander_ss
3 Replies

5. Shell Programming and Scripting

String replacement

I have one string string1=user/password:IP_ADDR:Directory I need to replace string1 value like store into string2 string2=user password:IP_ADDR:Directory i.e replace "/" character by '<space>' character But i wouldn't use any file in the meantime. Please help me......................... (6 Replies)
Discussion started by: mnmonu
6 Replies

6. Shell Programming and Scripting

String replacement

Hi I am new to shell scripting but i manage to do some simple things. I am trying to replace a string in one file. I am using sed to replace but it is not permanently writing to the file, rather it is temporary. I want to know whether is there any another method to replace a string in a file... (7 Replies)
Discussion started by: reddybs
7 Replies

7. Shell Programming and Scripting

Replacement of string

Hi I have a text file which contains the following. AAA,BBB,CCC,DDD AAA,BBB,CCC,DDD AAA,BBB,CCC,DDD How can I replace all CCC with 888, with other contents inside the file remain unchange? Please advice Desired output: AAA,BBB,888,DDD AAA,BBB,888,DDD AAA,BBB,888,DDD (1 Reply)
Discussion started by: c0384
1 Replies

8. Shell Programming and Scripting

AWK String replacement

I have an xml file with following tags <NewTag>value123</xyz> <NewTag>value321</abcd> I have to replace the values in between the tags with some value ( VAL1/VAL2) but the thing the ending tag can be any thing, for this i need a awk command currently i am using this but it... (5 Replies)
Discussion started by: subin_bala
5 Replies

9. Shell Programming and Scripting

String Replacement Script

Okay, I have a script right now that is made to search through a file and replace certain strings with a new one. The format to execute is "/subst <replacethis> <withthis> <filename>" and it only updates the file IF changes are made (in order to preserve the time it was made/last modified). I have... (6 Replies)
Discussion started by: jbud
6 Replies

10. Shell Programming and Scripting

sed problem - replacement string should be same length as matching string.

Hi guys, I hope you can help me with my problem. I have a text file that contains lines like this: 78 ANGELO -809.05 79 ANGELO2 -5,000.06 I need to find all occurences of amounts that are negative and replace them with x's 78 ANGELO xxxxxxx 79... (4 Replies)
Discussion started by: amangeles
4 Replies

Featured Tech Videos