Commands to

find out what groups a person is a member of:
    $ groups username

find out the members of a group:
    $ getent group groupname

change group permissions
    $chgrp groupname filename:

change file permissions (755 works well for web dirs):
    $chmod 775 filename 


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C 
On ella /opt/sfw/bin/gcc (and g++) is version 2.95.3.  If you put 
/opt/sfw/bin at the front of your command search path when you compile, 
you will get the older versions.  Version 3.x is much more compatible 
with the actual ANSI C++ standard, but since there is a lot of code 
crafted around the non-standard quirks of the older gcc C++ 
implementation, it is more or less mandatory to keep the old compiler 
around.

Beware that C++ code compiled (read: object files) with gcc 3.x is 
incompatible with code compiled with any earlier version.  You have to 
build your entire project with either one or the other.

On iuniverse, gcc 3 is not installed and just running "gcc" or "g++" 
will get you version 2.95.3.  Code compiled on iuniverse should run on 
ella but the reverse might not be true (iuniverse is Solaris 8, ella is 
Solaris 9).


R 
(version 1.6.2) is installed on iuniverse in addition to ella.  
The version on iuniverse is built with the GNU C/fortran compiler and 
no external libraries.  The version on ella is built with Sun's 
C/fortran and linked with Sun's optimized BLAS libraries.