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UNIX for Dummies Questions & Answers
Replace string and create new file multiple times
Post 302974092 by RavinderSingh13 on Wednesday 25th of May 2016 02:05:48 PM
05-25-2016
Moderator
Quote:
EGADS. This worked beautifully!
One minor question while I try to work out all the syntax: the two sets of files for comparison (what I previously referred to as 001.txt and blah1.txt) actually have the same numbering system - since there are hundreds of them - but with a different letter prefix for each set, i.e., a001..a300.txt and b001..b300.txt. I only want the numbers starting with a to increase without changing b. Where should I specify/add this prefix?
Sorry for the confusion!
---------- Post updated at 07:01 PM ---------- Previous update was at 06:47 PM ----------
Just tried it.
The search and replace bit works perfectly. It only creates a single new file though, called file02. However, it's a little strange because if I delete this file and run the script again, the replacement is called file03 (instead of file02 again). Hope that makes sense.
One minor question while I try to work out all the syntax: the two sets of files for comparison (what I previously referred to as 001.txt and blah1.txt) actually have the same numbering system - since there are hundreds of them - but with a different letter prefix for each set, i.e., a001..a300.txt and b001..b300.txt. I only want the numbers starting with a to increase without changing b. Where should I specify/add this prefix?
Sorry for the confusion!
---------- Post updated at 07:01 PM ---------- Previous update was at 06:47 PM ----------
Just tried it.
The search and replace bit works perfectly. It only creates a single new file though, called file02. However, it's a little strange because if I delete this file and run the script again, the replacement is called file03 (instead of file02 again). Hope that makes sense.That's because you haven't run it as a script and when you ran it as a command, variable named i's value will be there in memory of shell and it will take it from there. When you save this as a script and run this will not happen. As for file names I am still little confuse as you need to show like current_file_name--> new_file_name etc, I hope this helps you.
Thanks,
R. Singh
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LEARN ABOUT DEBIAN
rpl
RPL(1) BSD General Commands Manual RPL(1) NAME
rpl -- replace strings in files SYNOPSIS
rpl [-LhiwbqvsRepfdt] [-xSUFFIX] <old_string> <new_string> <target_file ...> DESCRIPTION
Basic usage is to specify two strings and one or more filenames or directories on the command line. The first string is the string to replace, and the second string is the replacement string. -h, --help A short help text. -L, --license Show the license and exit. -xSUFFIX Search only files ending with SUFFIX, e.g. ``.txt''. May be specified multiple times. -i, --ignore-case Ignore the case of old_string. -w, --whole-words Make old_string match only on word boundaries. -b, --backup Move the original files to filename~ before replacing them. -q, --quiet Quiet mode. -v, --verbose Verbose mode. -s, --dry-run Simulation mode, no files are changed. -R, --recursive Recurse into subdirectories. -e, --escape Expand escape sequences in old_string and new_string. Examples of escape sequences are ' ' (new-line), ' ' (tab), 'x42' (hexadec- imal number 42), ' 33' (octal number 033). -p, --prompt Prompt for confirmation before replacing each file. -f, --force Ignore errors when trying to restore permissions and file ownership. -d, --keep-times Keep modification times when replacing files. -t, --use-tmpdir Use a temporary directory for storing temporary files, usually the value of the environment variable TMPDIR. The default is to put temporary files in the same directory as the file being modified. -a, --all Do not ignore files and directories starting with . IMPLEMENTATION NOTES
An effort has been made to make the program behave as much as the original rpl as necessary. Where it has been possible to make improve- ments, improvements have been made. This implementation lacks many of the bugs in the original. EXAMPLES
Replace all occurences of ``F'' (on word boundaries) with ``A'' in all text files under the grades/ directory: $ rpl -Rwd -x'.txt' 'F' 'A' grades/ SEE ALSO
find(1), sed(1). HISTORY
This program was written for Debian as a free replacement for the non-free rpl program by Joe Laffey. AUTHORS
Goran Weinholt <weinholt@debian.org>. Debian July 31, 2005 Debian