まずはソース p Dir.pwd p File.expand_path(__FILE__) cuDir = File.expand_path(__FILE__).sub(/[^\/]+$/,'') p cuDir Dir::chdir(cuDir) p Dir.pwd /home/kasei-san/workで実行すると… %ruby /home/kasei-san/rabo/test/test.rb "/home/kasei-san/work" "…