我有几个版本的 Ruby gem：
$ gem list rjb (1.3.4, 1.3.3, 1.1.9)
如何删除旧版本但保留最新版本？
# remove all old versions of the gem gem cleanup rjb # choose which ones you want to remove gem uninstall rjb # remove version 1.1.9 only gem uninstall rjb --version 1.1.9 # remove all versions less than 1.3.4 gem uninstall rjb --version '<1.3.4'
