安装好后无法登录，提示为mysql无法连接

pretender

军哥好！之前用过都没问题，最近新装了台机器，发现就这样了，不知道如何处理，请帮忙看下：
Jan 28 14:28:02 ip-172-32-7-50 pure-ftpd: (?@36.103.77.154) [WARNING] Authentication failed for user [ftpuser_1]
Jan 28 14:28:11 ip-172-32-7-50 pure-ftpd: (?@36.103.77.154) [WARNING] Authentication failed for user [ftpuser_1]
Jan 28 14:28:11 ip-172-32-7-50 pure-ftpd: (?@36.103.77.154) [INFO] Logout.
Jan 28 14:28:37 ip-172-32-7-50 pure-ftpd: (?@36.103.77.154) [INFO] New connection from 36.103.77.154
Jan 28 14:28:37 ip-172-32-7-50 pure-ftpd: (?@36.103.77.154) [ERROR] The SQL server seems to be down [Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)]
Jan 28 14:28:43 ip-172-32-7-50 pure-ftpd: (?@36.103.77.154) [WARNING] Authentication failed for user [ftpuser_1]
Jan 28 14:28:50 ip-172-32-7-50 pure-ftpd: (?@36.103.77.154) [WARNING] Authentication failed for user [ftpuser_1]
Jan 28 14:28:50 ip-172-32-7-50 pure-ftpd: (?@36.103.77.154) [INFO] Logout.

pretender

修改mysql链接使用127.0.0.1搞定