rversionbuilt-in

How to tell which version of R I'm running when two versions are installed

There are two R directories on my computer:
one is /home/R-2.15.2,the other is /home/R-2.15.1,
when I input R , I can start R, now I want to know which R is running: 2.15.1 or 2.15.2?

Solution

  • Run R --version there's info about version on the first line.

    Edit: If you ask this question then I bet that R is not running from any of these directories. Check $PATH env variable to get information where binaries are looked for and in which order.

    Edit 2: Use type shell command to find where binary for given command is stored, -a for all paths, -f for the hashed one (basically: most recently used).