Debian Programming :: Using Perl To Replace Filename Strings In A Directory
Jun 12, 2013
I have a directory of orchestral music .ogg files from a family member. Each track is from a different artist and the CDDB entry adds a ":" character after the artist name in the track title.
I would like to parse file names in any given directory and search for the string Code: Select all: and replace it with Code: Select all_ According to this post on stackoverflow, I can use Perl to accomplish this task. I've tried Code: Select allperl -i.bak -pe 's/:/_/' but since I am still learning Perl I'm probably commiting a PEBKAC error.
How would I go about solving this issue with regular expressions using Perl?
I am trying to replace a section of a file between the first instances of the strings {}, with the contents of another file. Example of the format of the file I'm trying to modify
Something very handy to do in a Linux shell, is manipulating files and strings - essentially parsing data. Write a utility which will scan in a text file and search and replace strings. We also want to keep track of how many strings we've replaced.
I know that my command would look like this: <utility name> <filename> <stringToSearchFor> <stringToReplaceWith> Code: #!/bin/bash
it's been a while since I logged on here! I've been trying my hand at a little perl and have hit a brick wall.I'm using the Imagemagick module to manipulate some images. I can get the following to work without issue:
I wanted to find and replace a string from a perl file. I have written a script in bash which runs the following command.
perl -pi -e "s/$findstring/$replacestring/" testfile where as $findstring = print F_WC_TMP"$line "; and $replaceString = $line = join ' ', split ' ', $line; print F_WC_TMP"$line ";
But when I am running the above command, i think it is replacing the $findstring with the above mentioned string and hence it contains a $line, it is looking for the variable $line and not finding the exact string. I am confused about how to search for a string that contains $ in it and replace it with another $string.
I use udhcp with some of my minimal installs. I've messed around with the code a bit when it wasn't working correctly - a few years ago. I will find time - I hope soonish - to figure out how to do a few other things with it.
For now though, I'm using this string to grab my ip after startup
I realize I could substitute ifup -a but I'm more interested in figuring out how to make ifup wait for the ip to become available if it is not available yet.
Never mind that one, just typing out the question answered it for me, when I find it in the scripting man ' ; : " & =
Or if there are any other suggestions for better construction of the string.
At the moment I have a flat file which is being used by a few people. I want a script to remotely change the file, so I can start logging who is doing what.At this point here is one requirement I am trying to develop. We have text blocks who pretty much look like.I hope this is somewhat clear. I try to find $param for the right $workflow and change that. Can you help me to find $$var3 and change that?
I have script that I'm working on that updates a username in all the files that are called blah.inc for my framework. since i host a bunch of these web apps i need to do it to all of them. so I need to figure out how to update these files automagically with out me watching it to call vim every time. heres what I have so far
Code:
This finds the files but now i need to figure out how to do s/bob/fred/g on those files.
I am trying to write a Perl script that can open a file, find text that appears between two identifying strings (for now, "start" and "end"), then modify that text by enclosing it between "term_" and "_term" . Since the identified strings vary, the replacement string becomes "term_$1_term". From looking at other threads in this forum I've been able to get as far as spitting out the modified terms using the following code:
open FILE, "start2.txt" || die ("Could not open file <br> $!"); $text = <FILE>; while ($text=~ s/start (.*?) end//) {
[code]....
The problem is how to get "term_$1_term" into the file in the same while loop, which I'm guessing would be some of variant of "$text=~ s/$1/$term/;" (which doesn't work as it stands).
How can we convert a dynamic library (filename.so) to a static library (filename.a) using gnu gcc . Can we get a static library form a dynamic library . I saw a few post in which the conversion form a static library to a dynamic library is mentioned but, unfortunately, not the other way.
I'm writing a perl script to remove a test database and part of that is of course getting rid of all files. So I wrote this to do the job:
Code:
This always results in an "Could not open /u00/app/oracle/product/10.2.0/rdbms/dbs for reading: No such file or directory" (that directory is the one ending with the $spfile_dir variable) message, although that directory exists and the executing user has writing rights on it.
The same behaviour if I create the directory array like this:
Code:
The problem does not occur when one of the directories is the only element in the array though. Of course I could copy and paste that part of the script for the second directory, but I don't like that workaround.
I have one perl sctipt which generate cfg file with ^M in all the EOL. I need to remove the ^M from the cfg file. How can i remove that from the perl script itself. I have tried the following unix command in perl script,
I want to know the Perl command to replace a string by pointing the line number. I know how to replace a string without pointing a line number but I am in need to replace only the two matching string in a file
on creating a new perl script which replace IP address from the text file. eg. If in a file, we found any word like 11.222.333.44 then it has to be replaced to XX.XXX.333.44
I have downloaded torrent from some chinese tracker. It has ???? and some other symbol charaters in directory name. How to delete that file and directory?
I have a directory that has a large number of files, around 1.5 million at this point. If I go to the directory and type in "ls filename" for a filename that I know exists, ls just hangs. I have let it run for over 20 minutes and it never does anything. Up until yesterday the directory was working fine through samba serving up files, but now it doesn't return anything. How to proceed from here?
I want to search and replace strings in a file with strings in other files/i need to do it with big strings(string1 is big) and i want to use a txt file for this.But this code not working :
Is there any way to use sed to replace certain text in a file with the persons username automatically? Right now i'm using Code: Select allsed -i.bak s/STRING_TO_REPLACE/STRING_TO_REPLACE_IT/g file.foo
I would like it to automatically inject the persons usrname in the replacement string. Is this possible? I've been looking on line at various sed tutorials and I cant quite find what i'm looking for. I also didn't really see anything in the forums search function.Essentially i'm trying to take this file URL...Android.rules and replace all instances of username with the persons actual username automatically.
I have a very large directory with probably millions of small files in it. It's taking forever to run ls on the directory.
Is there an easy script that I can run to split the directory into smaller ones, based on the prefixes of the filenames. My goal is to wind up with something similar to what the Debian archives' pool directory looks like.
I am having a lot of problems trying to change one string by another using sed: the sentence is like this:
sed -i 's/KERNEL=="tty[A-Z]*", NAME="%k", GROUP="uucp", MODE="0660"/KERNEL=="tty[A-Z]*", NAME="%k", GROUP="uucp", MODE="0666"/g' 50-udev.rules it is just to fing the line with: KERNEL=="tty[A-Z]*", NAME="%k", GROUP="uucp", MODE="0660"
I wrote this small program that will truncate a string that's entered in by the user.An example of its usage:if the user enters in a string say "abcdefghijklmnopqrstuvwxyz" the program will only take the first 9 characters and truncate the rest so that the user can be prompted for a second string and not be worried about remaining characters left in the stream.Now this program works O.K. but I would like to find something in C that has this functionality build into it...Does anyone know of any function that will accomplish this.
Not using filename encryption when you create a new encrypted folder is easy, but how to disable it in the home encryption that is automatically set up by the Karmic installation CD?
I have a PHP script written that is checking a string to see if it contains a link in it (i.e. a URL). I have the following if statement, that uses 3 possible regular expressions to determine if there is a link or not.
Code: // check if we found a link // links are denoted by strings that: // - contain http:// // - contain www.*.*
[Code]....
I'm not convinced yet that writing a shell script to do this is the best course of action. If someone is capable of doing this with a Perl or a Python script that's fine too. If you want to make it super high performance and write it in assembly
