1. Shell Programming and Scripting

Hello, from the gnu sed manual, I should be able to do this: `\(REGEXP\)' Groups the inner REGEXP as a whole, this is used to: * Apply postfix operators, like `\(abcd\)*': this will search for zero or more whole sequences of `abcd', while `abcd*' ... (3 Replies)

2. Shell Programming and Scripting

Hi, all: I have a question about "cleaning up" a huge file with regular expression(s) and sed: The init file goes like this: block1,blah-blah-blah-blah,numseries1,numseries2,numseries3,numseries4 block2,blah-blah-blah-blah-blah,numseries,numseries2,numseries3,numseries4 ...... (3 Replies)

3. Shell Programming and Scripting

Hi there, I need to test that a variable ($VAR) matches a regex mask in BASH. I have the exact thing working in perl (below), but could somebody advise me how i would do the same in BASH ? do i need to use something like egrep ? #!/bin/perl -w my $VAR = "some value"; if ( $VAR =~... (4 Replies)

4. UNIX for Advanced & Expert Users

Hi, Putting across a few awk expressions. Apart from the last, all of them are working. echo a/b/c | awk -F'/b/c$' '{print $1}' a echo a/b/c++ | awk -F'/b/c++' '{print $1}' a echo a/b/c++ | awk -F'/b/c++$' '{print $1}' a/b/c++ Request thoughts on why putting a '$' post double ++... (12 Replies)

5. Shell Programming and Scripting

Hi, I'm trying to validate if a string matches a regular expression, but it is not working. Am I missing something? Do I need to scape any of the characters? if echo 'en-GB' | egrep '({1,8})(-{1,8})*' >/dev/null; then echo Valid value fi Thanks in advance (6 Replies)

6. Shell Programming and Scripting

Can you explain what this line of script is doing. What I have understood is : -- variable C is the name of a software which is either not installed, so it must be installed or allready installed and then should be update if newer version found -- branch B="$B $C" is to install the software --... (4 Replies)

7. UNIX for Dummies Questions & Answers

I have a number of files that I pass through awk/gsub. I believe to have found a working regex and on 'test bed' sites it matches, however within gsub it does not. Examples: Initial data: /Volumes/Daniel/Public/Drop Box/_Hellsing_Ultimate_OVA_-_10_.mkv gsub & regex: gsub("\]+\]","" ... (4 Replies)

8. Shell Programming and Scripting

Using BASH: $ if -- ::00" ]]; then echo "true"; else echo "false"; fi false Mike (5 Replies)

9. Shell Programming and Scripting

I am using a regex to exactly match a string abcdef as ^abcdef$. But it does'nt seem to work :( (11 Replies)

10. Shell Programming and Scripting

Hello to all, The Regex below is supposed to match all strings except RR45. I've tested in regex101.com and it works, butwhen I try to use it with the perl command below I get the error shown. Regex=(?<=^|RR45)(?!RR45).+?(?=RR45|$) How to fix this? I'm using Cygwin. $ echo... (9 Replies)