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Hi Ive just moved over to Linux from Windows and I am trying to convert a Windows batch file to a unix shell script to run a java application, but it so long since Ive used UNIX I cant really remember how to do it.
My script contains
java -jar lib/testapp.jar
These are my failed attempts to run it, not too sure what the differences are but I think the 3rd one is the only one to actually find my shell script.
-bash: testapp.sh: command not found
[root@]# ./ testapp.sh
: bad interpreter: No such file or directory
[root@]# . testapp.sh
Unable to access jarfile lib/testapp.jar
if I just do this at the command line it works fine
You shouldn't be surprised, the end of line character (\n) under unix is the single line-feed character, and not the double carriage-return/line-feed like DOS/Windows.
Moreover, CR (\r) is a valid filename character for most unix supported file-systems, so it isn't forbidden, although not a smart idea, to have one interpreter named /bin/sh and another one named /bin/sh\r , and the #! construction should be able to distinguish between them.
About the bash question, it is probably a good idea to leave /bin/sh instead of /bin/bash, as it makes your script more portable, unless you use bash specifics unsupported on the real bourne shell.