我在输入 mysql“root”密码时很快就遇到了以下错误：
An error occurred while setting the password for the MySQL administrative user.
This may have happened because the account already has a password, or because of a
communication problem with the MySQL server.
这是 apt-get install mysql-server 的完整输出：
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following extra packages will be installed:
libaio1 libdbd-mysql-perl libdbi-perl libmysqlclient18 libterm-readkey-perl
mysql-client-5.5 mysql-client-core-5.5 mysql-common mysql-server-5.5
mysql-server-core-5.5
Suggested packages:
libclone-perl libmldbm-perl libnet-daemon-perl libplrpc-perl
libsql-statement-perl tinyca mailx
The following NEW …