user@machine:~$ gem list
*** LOCAL GEMS ***
bigdecimal (1.2.8)
did_you_mean (1.0.0)
io-console (0.4.5)
json (1.8.3)
minitest (5.8.4)
net-telnet (0.1.1)
power_assert (0.2.7)
psych (2.0.17)
rake (10.5.0)
rdoc (4.2.1)
sass (3.4.23)
test-unit (3.1.7)
user@machine:~$ sudo gem uninstall rake
ERROR: While executing gem ... (Gem::InstallError)
rake is not installed in GEM_HOME, try:
gem uninstall -i /usr/share/rubygems-integration/all rake
user@machine:~$ sudo gem uninstall -i /usr/share/rubygems-integration/all rake
Remove executables:
rake
in addition to the gem? [Yn] Y
ERROR: While executing gem ... (Gem::FilePermissionError)
You don't have write permissions for the /usr/share/rubygems-integration/all/bin directory.
user@machine:~$ ls /usr/share/rubygems-integration/all/
specifications
user@machine:~$
我无法卸载这个 gem,也不能使用它 :( 似乎它不存在。
我的 Ruby 版本是 2.3.1.p112