装phpayadmin出错了。
phpmyadmin 404 not found
buntu
安装phpmyadmin后无法在http://ip地址/phpmyadmin下访问，
原因是ubuntu下phpmyadmin默认安装在/usr
/share/phpmyadmin,而不是/var/www下，
所以只需在终端输入
sudo ln -s /usr/share/phpmyadmin/
/var/www/
然后变成了
phpMyAdmin - Error
The json extension is missing. Please check your PHP configuration.
The fix was simple: run "sudo apt-get install php5-json".
Then I restarted apache: "sudo service apache2 restart"