[PLUG] bash 101 slides updated again, & info on why the #!/bin/bash -

[JP Vossen <jp@jpsdomain.org>]

At dinner after last night's PLUG W meeting, Eric pointed out that I 
forgot to mention that you need to add eXecute perms to a shell script 
before it will run or you'll get a permission denied error.  Duh... 
Thanks Eric.

I also talked about the 'checkbashisms' script but can never remember 
the name of the package.  It's "devscripts" in the Debian/Ubuntu repos.  So:

1) aptitude install devscripts
2) "checkbashisms: check whether a /bin/sh script contains any common 
bash-specific constructs"


Updated slides at:
	http://www.jpsdomain.org/public/2011_bash_101.odp
	http://www.jpsdomain.org/public/2011_bash_101.pdf


I didn't add this to the slides, but the explanation for adding the '-' 
to the shebang line is at:
	http://www.faqs.org/faqs/unix-faq/faq/part4/section-7.html

And as I re-read that, I think it's probably moot on Linux, since Linux 
doesn't allow setuid shell scripts [1], but it's still a good habit just 
in case.  And I guess it would apply to other interpreters, like Perl, 
since 'perl -d' is arguably interactive Perl...


Thanks,
JP

[1] http://www.linuxjournal.com/article/7727?page=0,1
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