小编Syd*_*mir的帖子

我在windows 8.1 pro中安装ruby

ruby 2.1.3p242 (2014-09-19 revision 47630) [x64-mingw32]

和宝石版

2.2.2

在执行gem安装时抛出此错误:

ERROR:  Loading command: install (ArgumentError)
        unknown encoding name - CP720
ERROR:  While executing gem ... (NoMethodError)
    undefined method `invoke_with_build_args' for nil:NilClass

我在Ubuntu 15.04中安装了几次Mongodb,但它安装不正确并且mongo shell有错误:

 ?  mongo
MongoDB shell version: 3.0.1
connecting to: test
2015-04-07T18:46:14.958+0430 W NETWORK  Failed to connect to 127.0.0.1:27017, reason: errno:111 Connection refused
2015-04-07T18:46:14.959+0430 E QUERY    Error: couldn't connect to server 127.0.0.1:27017 (127.0.0.1), connection attempt failed
    at connect (src/mongo/shell/mongo.js:179:14)
    at (connect):1:6 at src/mongo/shell/mongo.js:179
exception: connect failed

我正在安装2.6.4并更新到3.0.1但错误无法解决.我在stackoverflow中找到了这个答案并搜索在ubuntu中找到mongod.lock并将其删除然后流程这一步:

Step 2: Repair mongodb. 
sudo mongod --repair 

Step 3: start mongodb.
sudo start mongodb 
or
sudo service mongodb start

Step 4: Check status of mongodb.
sudo status mongodb …