bash scripting

I wrote the following script to learn to read and write files. No matter how I try to start it it doesn't work.

#!/bin/bash

shopt -s -o nounset

declare LINE

exec 3< test.dat

while read LINE <&3 ; do
printf "%s\n" "$LINE"
done

exit 0

this is the error

[root@localhost scripts]# ./test.sh
: bad interpreter: No such file or directory
[root@localhost scripts]#

can someone point me in the write direction? thanks again Dave

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Hi,

I copied this into a file and it runs fine on my Debian system. I think your error message gives a hint.

: bad interpreter: No such file or directory

Usually means that the system can't find the interpreter. ie when it looks at the line:#!/bin/bash
it can't find /bin/bash.
I have seen similiar problems with perl. Someone puts #!/bin/perl
in a script. It works on one machine but if the script is moved to another machine, it bombs out because the perl interpreter is in a different place.

I assume bash is on your system. Try running
which bash
to find the path to the bash excutable. On most Linux systems it is /bin/bash but I have seen /usr/local/bin/bash and /opt/bin/bash (on a Solaris system).

Incidently, my standard way of writing scripts in vi is to type #!
Then type <ESC>
Then type : r ! which bash
This causes the path to bash appear on the line under the #! line. I then move the cursor up one line and type J to join the lines. This guarantees the correct path to the interpreter on the machine I am using. But then you may not be using vi :-)

Hope this helps.

regards,

John Kelly
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