The "source" command

[The Switch Blade]

$ source $iraf/unix/hlib/irafuser.csh
bash: /iraf/iraf//unix/hlib/irafuser.csh: line 10: syntax error near unexpected token `else'
bash: /iraf/iraf//unix/hlib/irafuser.csh: line 10: `else if (-f /etc/SuSE-release) then'

what should I do instead?

[baseface]

source is for bash. you are running source on csh scripts. try "rehash" instead.

[The Switch Blade]

bash: rehash: command not found

[baseface]

dude, why are you running csh scripts from bash? it doesnt work.
you need to be using csh to run csh scripts.