2/16 パーミッション : (rdbg) p a.mode # command => 16877 (rdbg) p a.mode.to_s(8) # command => "40755" (rdbg) puts "0%o" % a.mode # ruby 040755 nil (rdbg) puts a.mode.to_s(8) # ruby 40755 nil (rdbg) printf "0%o\n" , a.mode # ruby 040755 nil…