Re: [Help-bash] how to bulk rename files

[lxnf98mm]

On Wed, 11 Apr 2012, Greg Wooledge wrote:

> On Wed, Apr 11, 2012 at 02:51:04PM -0600, Eric Blake wrote:
> > On 04/11/2012 02:44 PM, address@hidden wrote:
> > > I have many files, 2.5 million, that I have to make available to Windows
> > > folks
> > > They demand that the files have a extension added
> > > Is there an efficient method of bulk renaming files
> >
> > If you're wanting to use just bash features:
> >
> > for f in $(generate your list of files); do
> >   mv "$f" "$f.ext"
> > done
> >
> > If you want efficient, there's several purpose-built tools for this job,
> > but it is no longer a question for the bash list.  My favorite:
> >
> > man mmv
>
> for f in $(thing that generates filesnames) is a very bad idea.  You'll
> get hit by word splitting or globbing of filenames that have spaces or
> glob characters in their names.
>
> Is it safe to assume that these files exist in some sort of multi-level
> hierarchy, rather than a single directory?  If so, you want to use find.
>
> find . -type f ! -name '*.*' \
>  -exec sh -c 'for f; do mv "$f" "$f.txt"; done' _ {} +
>
> (assuming you wanted to add .txt)

they are in a single directory
and why not find . -type f ! -name '*.*' -exec mv '{}' '{}'.txt \;

--
"the 10 most dangerous words in the English language are, 'Hi, I'm from
the Government, and I'm here to help.'"

Ronald Reagan - July 28, 1988