1) When creating a script I made a file "prog1.sh" does it matter if the end is .sh or is this what has to be done like prog.bash or prog.ksh?
Linux and UNIX don't care about the filename at all. They check the first few bytes in the file to see what it is.
Quote:
2)when using "set" command does my top line file have to
or can i leave it as
?
All the top line does is tell the OS what shell to use.
If you want to use tcsh, it should be #!/bin/tcsh
If you want to use sh, it should be #!/bin/sh
They both have 'set', actually. But they're not the same 'set'. So it depends which programming language you have been writing for!
Quote:
3) How do you assign a user variable in sh or bash?
Easy:
Note that you can't put spaces between VAR, =, and ". like you might in tcsh. It has to be VAR="... with no spaces at all except inside quotes. This is because of the way BASH lets you set variables before running a program:
which would export http_proxy only for wget. csh doesn't have that feature.
bash, ksh, and sh are all bourne shells. bash and ksh are different extensions on the basic 'sh', and should still be able to run plain 'sh' code fine. But if you use arrays for example, it won't work in a basic 'sh' shell. If it does on your system, that's often because sh is just a link to bash in some linux systems.
csh and tcsh are definitely not bourne shells at all.
Last edited by Corona688; 12-15-2011 at 03:02 PM..
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