按照python3網絡爬蟲開發的書上，運行redis-dump報錯，如下：C:Userswjh>gem install redis-dumpSuccessfully installed redis-dump-0.4.0Parsing documentation for redis-dump-0.4.0Done installing documentation for redis-dump after 2 seconds1 gem installedC:Userswjh>redis-dumpERROR (Errno::ENOENT): No such file or directory - ps -o rss= -p 6128是不是要切換到安裝目錄才可以，求大神解決。。。