当我安装 APC 时：
pecl install apc
我收到此错误：
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
apache2-prefork-dev : Depends: apache2.2-common (= 2.2.22-1ubuntu1.4) but it …当我执行：
ssh root@myVPS
我收到下一个警告：
Warning: the RSA host key for 'myVPS' differs from the key for the IP address 'xxx.xx.xxx.xx'
Offending key for IP in /home/manolo/.ssh/known_hosts:1
Matching host key in /home/manolo/.ssh/known_hosts:2
Are you sure you want to continue connecting (yes/no)?
如果我输入“是”，我工作正常，但我不知道为什么会抛出这个警告。关于为什么抛出它以及如何避免它的任何建议？
我有一个不受密码保护的ssh 密钥，我用它来连接服务器。现在我想向密钥添加一个密码，所以我已经完成了：
ssh-keygen -p
并添加了一个新的密码：
Enter file in which the key is (/home/user/.ssh/id_rsa):
Enter old passphrase:
Key has comment '/home/user/.ssh/id_rsa'
Enter new passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved with the new passphrase.
然后，我尝试再次连接到服务器：
ssh user@server.com -v
但我仍然在未输入密码的情况下登录：
debug1：可以继续的身份验证：publickey
debug1：下一个身份验证方法：publickey
debug1：提供RSA公钥：/home/user/.ssh/id_rsa
debug1：服务器接受密钥：pkalg ssh-rsa blen 279
debug1：身份验证成功（公钥）。
已通过 server.com ([xxx.xx.xxx.xx]:22) 验证。
为什么我没有被要求输入密码？
编辑：
Seahorse为我存储了密钥，所以这就是问题所在。