我正在使用OS X Yosemite版本10.10.4，而且我是ruby和rails的新手。试图为我正在服用的udemy类构建一个测试应用程序，并且无法卸载ruby重新开始。
rm: /Users/thomascalhoun/.rvm/rubies/ruby-2.2.1/lib/ruby/gems/2.2.0/gems/tzinfo-1.2.2/test/zoneinfo: Permission denied
rm: /Users/thomascalhoun/.rvm/rubies/ruby-2.2.1/lib/ruby/gems/2.2.0/gems/tzinfo-1.2.2/test: Permission denied
rm: /Users/thomascalhoun/.rvm/rubies/ruby-2.2.1/lib/ruby/gems/2.2.0/gems/tzinfo-1.2.2/tzinfo.gemspec: Permission denied
rm: /Users/thomascalhoun/.rvm/rubies/ruby-2.2.1/lib/ruby/gems/2.2.0/gems/tzinfo-1.2.2: Directory not empty
rm: /Users/thomascalhoun/.rvm/rubies/ruby-2.2.1/lib/ruby/gems/2.2.0/gems: Directory not empty
rm: /Users/thomascalhoun/.rvm/rubies/ruby-2.2.1/lib/ruby/gems/2.2.0: Directory not empty
rm: /Users/thomascalhoun/.rvm/rubies/ruby-2.2.1/lib/ruby/gems: Directory not empty
rm: /Users/thomascalhoun/.rvm/rubies/ruby-2.2.1/lib/ruby: Directory not empty
rm: /Users/thomascalhoun/.rvm/rubies/ruby-2.2.1/lib: Directory not empty
rm: /Users/thomascalhoun/.rvm/rubies/ruby-2.2.1: Directory not empty
++ typeset ret=1
++ rvm_debug '__rvm_rm_rf error removing target dir '\''/Users/thomascalhoun/.rvm/rubies/ruby-2.2.1'\''.'
++ (( 0 ))
++ return 0
++ return 1