Save enviroment variables

UNIX Solaris
1

I need to save my enviroment variables,specially the $PATH.When I put it on .cshrc at next reboot I lost the configuration.How can avoid this?Thanks

2

1.- Log as root
2.- Create a file called .profile in /
3.- vi .profile
PATH=$PATH:/my/path/
EXPORT $PATH
4.-Save
5.-reboot the system and its ready

3

Many thanks!