thanks to take all this time to help me.... this is better, after i removed the compiled version i get that : [root@compute src]# cat `which gem` | head -n 1 #!/usr/bin/ruby [root@compute src]# ls -l `which ruby` -rwxr-xr-x 1 root root 3748 jui 1 10:33 /usr/bin/ruby great ! but i when i try to run ruby that's a drama... [root@compute src]# ruby -bash: /usr/local/bin/ruby: No such file or directory My path is : /usr/lib/ccache:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin maybe another thing to do for updating the path ? -- Posted via http://www.ruby-forum.com/.