hello,

i'm testing now a redhat server ...

how i know:

1. perl version
2. MySQL version
3. PHP version
4. C++

please help urgently ...

On the command line, it's normally just a -v after the executable of the program, so:

perl -v
mysql -v
g++ -v (not sure about this one, I assume you mean the C++ compiler version? Try gcc -v as well, for C)
php -v (guessing)

thank you very very much .. and how i know if zend optmizer is installed

To check the MySQL version information, it is mysql -V (with capital V, -v is verbose)