Unix PATH Override Commands

Question

Say my PATH="/usr/bin ... /root/.rbenv/shims"

I have an executable file (ruby) in /usr/bin and /root/.rbenv/shims . How can I call ruby ​​in /root/.rbenv/shims ?

Answer 1

Put /root/.rbenv/shims first in PATH :

 export PATH=/root/.rbenv/SHIMS:$PATH 

(Before you run this command, you must be sure that PATH already exists - if it is not, it adds the current working directory to your PATH , which is almost always an error.)

Answer 2

Use the absolute path:

 $ /root/.rbenv/shims/ruby ... 

If you do this from a shell script, use

 #!/root/.rbenc/shims/ruby 

like shebang