Question : Ruby upgrade to 1.8.6 on CentOS

I have been running Ruby on a CentOS vps for a while with no problems.  I have been running 1.8.4, which was installed using Yum.  I want to upgrade to 1.8.6, but Yum can't seem to find this version, so I compiled and installed it.  I removed the old version from Yum using "yum remove ruby".  The new version lives in /usr/local/bin/, but every time I try to access it (say I type "ruby -v"), it says "-bash: /usr/bin/ruby: no such file or directory".  /usr/local/bin is in my path, so shouldn't it be able to find it?  Any help would be appreciated.

Answer : Ruby upgrade to 1.8.6 on CentOS

That is  a problem of the first line in the ruby scripts, It will look like this:
#!/usr/bin/ruby

And ruby is not there any longer.

Solution:
1) if you have env and are sure that ruby is in your path write the line
#!/usr/bin/env ruby

2) make symbolic link from /usr/local/bin/ruby to /usr/bin/ruby
ln -s /usr/local/ruby /usr/bin/ruby

3) change the first line to
#!/usr/local/bin/ruby

Regards
Friedrich