l i n u x - u s e r s - g r o u p - o f - d a v i s
Next Meeting:
June 2: Social gathering
Next Installfest:
Latest News:
May. 19: LUGOD special elections
Page last updated:
2010 Jun 30 15:59

The following is an archive of a post made to our 'vox-tech mailing list' by one of its subscribers.

Report this post as spam:

(Enter your email address)
Re: [vox-tech] Regular expression help
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [vox-tech] Regular expression help

Harold, that's perfect. Just what I needed!

Thanks so much,

-- Dave Spencer, PageWeavers

On Jun 30, 2010, at 3:16 PM, Harold Lee wrote:

> Take 2:
> perl -n -e 'chomp; if(/([^ ]+)$/) { print "rm -f $1\n"; }' < files-to-delete.txt
> -n will loop over the input lines like -p but it won't echo the input
> lines. Chomp will remove the newlines. Adding the "if" makes sure we
> don't print "rm -f" for empty lines or lines that don't match.
> Then you have your rm commands and you can scan them for correctness.
> Harold
> On Wed, Jun 30, 2010 at 3:13 PM, Harold Lee <harold@hotelling.net> wrote:
>> If none of the filenames contain spaces(!), you can write a regexp to
>> match the end of the line using the $ anchor, e.g.
>> perl -p -e '/([^ ]+)$/; print "rm -f $1\n";' < files-to-delete.txt
>> Harold
>> On Wed, Jun 30, 2010 at 3:01 PM, David Spencer, Internet Handyman
>> <spencer@pageweavers.com> wrote:
>>> Guys, I'm sorry about asking this on the list; but I seem to have a mental
>>> block when it comes to regular expressions. Here's what I'm trying to do:
>>> I have a lot of directories with a vast number of files, some of which I wish
>>> to delete based on the month they were created. I've built a file from some
>>> full directory listings that has all the files I wish to delete. (Just go with
>>> me on this and don't suggest alternative methods of performing the task - I'm
>>> simplfying the job so it can be explained more easily.)
>>> A snippet of the file would look like this:
>>> -rw-------  1 auser auser 3.7K Apr 12 10:11 auser/folder/new/127109228.file
>>> -rw-------  1 auser auser  16K Apr 12 12:32 auser/folder/new/127110076.file
>>> I would like to write either single-line perl command or a nano search and
>>> replace to substitute the directory info and replace it with a file delete
>>> so it would look like this:
>>> rm -f auser/folder/new/127109228.file
>>> rm -f auser/folder/new/127110076.file
>>> Then I can just execute converted directory file as a shell script and
>>> delete my files. But I'm having a brain-freeze on what a valid regex would
>>> look like to match. Help??
>>> Thanks again,
>>> -- Dave Spencer, PageWeavers
>>> _______________________________________________
>>> vox-tech mailing list
>>> vox-tech@lists.lugod.org
>>> http://lists.lugod.org/mailman/listinfo/vox-tech
> _______________________________________________
> vox-tech mailing list
> vox-tech@lists.lugod.org
> http://lists.lugod.org/mailman/listinfo/vox-tech

vox-tech mailing list

LUGOD Group on LinkedIn
Sign up for LUGOD event announcements
Your email address:
LUGOD Group on Facebook
'Like' LUGOD on Facebook:

Hosting provided by:
Sunset Systems
Sunset Systems offers preconfigured Linux systems, remote system administration and custom software development.

LUGOD: Linux Users' Group of Davis
PO Box 2082, Davis, CA 95617
Contact Us

LUGOD is a 501(c)7 non-profit organization
based in Davis, California
and serving the Sacramento area.
"Linux" is a trademark of Linus Torvalds.

Sponsored in part by:
Appahost Applications
For a significant contribution towards our projector, and a generous donation to allow us to continue meeting at the Davis Library.