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compiling programs

Posted on 1998-10-24
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Last Modified: 2010-04-20
how can I compile/run script that look LIKE
echo "Blah Blah. "
mv /home/users/ciris /home/ciris
rm /home/users/ciris/file
echo "finished."
?
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Question by:ciris
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Expert Comment

by:xterm
ID: 1638352
Compile it?   You don't need to compile anything - your
script is ready to go.  Just put the line "#!/bin/sh" at
the top of a new file, enter your 4 lines below that, and
save it.

Then "chmod u+x filename" and run it with "./filename"
(or you can type "sh filename")
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by:ciris
ID: 1638353
if I name it blah, how can I get it to be executed (in that directory only) as blah, not ./blah?
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xterm earned 100 total points
ID: 1638354
Well, you could add "." to your path by doing:
export PATH=$PATH:.

.but it is recommended generally that you do not login
as root with "." in your path (although the risk of being
trojaned with that being the last item in your path is
minimal).

An example would be if a user put a file called "ls" in his
home directory that contained "rm /etc/passwd" - you get the
idea, I'm sure.
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Author Comment

by:ciris
ID: 1638355
deleting the password file would delete the passwords, right? would this work with a shadowed password?
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Expert Comment

by:xterm
ID: 1638356
No, you'd have to delete /etc/shadow too - that wasn't my
point.  My point was that horrible things can happen if an
unsuspecting admin had . in their path & they had some
malicious shell users.  
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