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Smart way to perform a similar replacement (not simple enough for diff) in multiple files?

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http://unix.stackexchange.com – I have a bunch of files (45, so too many to edit them manually without going crazy) which all require the same changes (as seen in the three diffs at the end of this question). Most tools used for search-and-replace on the commandline only support line-by-line replacements so they won't work. Is there some commandline tool available which can do the job? Basically performing a multi-line regex search&replace with backreferences without shoving the whole regex into a single line (i.e. it should be read from a file or stdin) should be enough, but maybe there's an even better solution to do (HowTos)

Danial's picture
Submitted by Danial on 09/13/2012

Stories similar to Smart way to perform a similar replacement (not simple enough for diff) in multiple files?

Hi

Input:

Code: - -- --- ---- aa-bb-cc aa--bb--cc aa---bb---cc aa----bb----cc Output:

Code: . - -. -- aa.bb.cc aa-bb-cc aa-.bb-.cc aa--bb--cc I need to replace a simple '-' with '.' but if I want to keep the '-' I will use '--'

I would a like a solution where regex is used as search criteria and the match will be replace with a value.

Hi there,

Does anyone know of an editor that can search and replace with regex?

I've tried both bluefish and geany but they can only search with a regex but not replace with a regex.

Bluefish seems to support groups, while geany does not. But can't get bluefish to work with regex in replace field.

I want to search for this:

Code: (?'prefix'[<][t][i][n][>][0-9]{6})(?'dash'[-])(?'su

Search and replace text 2 years 32 weeks ago

Hello,

I am trying to search and replace but I don't know how to do it. My simple knowlegde in search and replace using sed is not helping me at all.

File:

Code: its a cause value #22: dfg ggg Cause value #1: aasfa fasdf asfa value #22: affg gggg Basically i want to replace the colon(:) with hash (#) while retaining the rest of the words on that line.

Assume I have a big file, ~1k lines, and I need to delete the line after some pattern, lets call it: somePatern.

Conditions:

cannot be done by hand (no searching -- /somePattern, and/or manually moving down one line and deleting). preferably a single liner.

GSUB/Regex Help 39 weeks 2 days ago

I am trying to write my gsub regex to replace a bunch of special characters with spaces, so i can split it to an array and look at each word independently.

However, my regex skills are slightly lacking and I appear to be missing a quote or something here.

I am trying to replace the following characters \/;:'"`()| with a space.

Code: gsub ( "[\\'|\\"|\\:|\\;|\\`|\\(|\\

I have a strange issue with large files and bash. This is the context:

I have a large file: 75G and 400,000,000+ lines (it is a log file, my bad, I let it grow). The first 10 chars of each line is a time stamps in the format YYYY-MM-DD. I want to split that file: one file per day.

I tried with the following script that did not work.

We have already seen an official command line google product, googlecl, but this is not the only one. There have always been shell lovers who tried to bring this Web Giant on a console.

hi I am trying to use SED to replace the line matching a pattern using the command

sed 'pattern c\ new line ' <file1 >file 2

I got two questions

1. how do I insert a blank space at the beginning of new line?

2. how do I use this command to execute multiple command using the -e options (if possible)? as I want to replace multiple lines in a single file.

Thanks Robert

I would like to remove carriage returns/line feeds in a text file, but in a specific cadence: Read first line (Header Line 1), remove cr/lf at the end (replace it with a space ideally); Read the next line (Line of Text 2), leave the cr/lf intact; Read the next line, remove the cr/lf; Read the next line (Header Line 2), remove cr/lf at the end (replace it with a space); Read the next line (Line of