我最近在 localhost 上安装了apache2，phpmyadmin每次尝试连接时localhost/phpmyadmin都会提示“输入您的用户名/密码”。我输入 root 作为用户名，然后输入我自己的密码。当我这样做时，我会进入一个页面，上面写着：
Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator at webmaster@localhost to inform them of the time this error occurred, and the actions you performed just before this error.
More information about this error may be available in the server error log.
Apache/2.4.7 (Ubuntu) Server at localhost Port 80
这是我的 apache2 错误日志：
[Sun Nov 02 20:54:42.675681 2014] [authn_file:error] [pid 10548] (2)No such file or directory: [client 127.0.0.1:33730] AH01620: Could not open password file: /etc/apache2/.phpmyadmin.htpasswd
[Sun Nov 02 20:58:16.862329 2014] [mpm_prefork:notice] [pid 10542] AH00169: caught SIGTERM, shutting down
[Sun Nov 02 20:58:17.952658 2014] [mpm_prefork:notice] [pid 10889] AH00163: Apache/2.4.7 (Ubuntu) PHP/5.5.9-1ubuntu4.5 configured -- resuming normal operations
[Sun Nov 02 20:58:17.952714 2014] [core:notice] [pid 10889] AH00094: Command line: '/usr/sbin/apache2'
[Sun Nov 02 20:58:22.247743 2014] [authn_file:error] [pid 10893] (2)No such file or directory: [client 127.0.0.1:33761] AH01620: Could not open password file: /etc/apache2/phpmyadmin.htpasswd
[Sun Nov 02 20:58:23.369528 2014] [authn_file:error] [pid 10894] (2)No such file or directory: [client 127.0.0.1:33762] AH01620: Could not open password file: /etc/apache2/phpmyadmin.htpasswd
[Sun Nov 02 20:58:23.791622 2014] [authn_file:error] [pid 10895] (2)No such file or directory: [client 127.0.0.1:33763] AH01620: Could not open password file: /etc/apache2/phpmyadmin.htpasswd
[Sun Nov 02 21:01:53.884507 2014] [authn_file:error] [pid 10893] (2)No such file or directory: [client 127.0.0.1:33951] AH01620: Could not open password file: /etc/apache2/phpmyadmin.htpasswd`
知道如何修复此问题吗？我确实尝试在 askubuntu 上搜索答案，并尝试了几种方法，但似乎都不起作用。