Ruby Installation Information

RbConfig module

The RbConfig module reveals a lot of information about the ruby installation. Try these commands:

$ ruby -e 'pp RbConfig::CONFIG'
$ ruby -e "puts RbConfig::CONFIG['archdir']"
$ ls "$(ruby -e "puts RbConfig::CONFIG['archdir']")"

$ ruby -e "puts RbConfig::CONFIG['bindir']"
$ ls "$(ruby -e "puts RbConfig::CONFIG['bindir']")"

Sample from my system with ruby 4 on Arch Linux on 2026:

References

https://docs.ruby-lang.org/en/master/RbConfig.html