[Cialug] Regular Expression for Pathnames

[Daniel A. Ramaley]

This should work for your purposes if all the data looks like the 
samples. Set the number between curly braces to whatever you need. (Note 
that your sample data didn't have any matches for just 2 slashes, but 
does for 3 slashes.)

	egrep '^(/[^/]+){3}$'

On 2014-11-24 at 10:23:07 Todd Walton wrote:
> If I have a text file full of pathnames, like:
> 
> /var/log/folder1
> /var/log/folder2
> /home/todd/mydir
> /var/log/folder1/fileh
> /var/log/folder1/foldersub/fileh
> 
> ...etc, what's the regular expression to find where a string has
> exactly two (or however many) forward slashes to the left of it?  I
> have a 360,000 line list of path names, and I'd like to find where a
> certain string falls early in the path.  I'm really only interested
> in paths where it's in the top three or four directories.
> 
> --
> Todd
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Daniel A. Ramaley  |  Network Engineer 2
Drake Technology Services (DTS) | Drake University

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