Re: [Linuxcommand-discuss] Greetings & a Script

[William S. <wes...@co...>]

On Wednesday 28 August 2002 08:36 pm, Bruce Burhans wrote:

> > First, you could simplify it by doing the following:
> >
> > #!/bin/bash
> >
> > old=$1
> > new=$2
> >
> > for i in *$old; do
> > k=$(basename $i $old)
> > mv $i $k$new
> > done
> >
> > I haven't tested this, but it looks right ;-)
>
>         Bill.....I have bad news and good news.....
>
> The script above  puts the new extension on every file
> in the directory, regardless of its present extension...
> The  test part is needed....

Try it again Bruce.  The "for" will only select files that have the old 
extension.  Make sure you are using:

for i in *$old;

and not

for i in * $old;

If you include a space between the "*" and the "$old", it will process all 
the files.

>
> I am  a good way through your scripting tutorial,  and it
> is the best one  out of a half-dozen I have on my box..
>
> You take the time to explain what is going on, to answer
> obvious questions that pop up,  and are oriented towards
> functionality.  For example:  Not one of the other tutorials
> mentions that you  bash has a help command.....
>
> I've read the entire bash reference manual, and had no
> idea that such a thing existed.......Nor do any of them
> tell you that you put a function in your  .bashrc.....!
> (why don't you need to chmod +rx  it ? )  or enter them
> on the cli.....

You don't need to make it executable because it's not executed, it's sourced.
That is, it is read as input by another script, usually .bash_profile.

> You have the makings of a really good book there...
> (e or otherwise )

Maybe someday.  I'd be happy just to have enough time to write the next 
lesson.

-- 
|||||  William Shotts, Jr. (bshotts AT panix DOT com)
|||||  Be a Linux Commander!  Follow me to http://linuxcommand.org