我的家庭网络上的Linux（Ubuntu 16.04）计算机上运行了mysql服务器，我正在尝试从同一网络上的Windows 10计算机连接到它。它不起作用。我可以从windows机器成功ping linux机器，但是当我尝试从Windows机器telnet到端口3306时，它无法打开连接。我在Windows机器上禁用了防火墙，结果相同。
这让我相信问题出在Linux机器上。但是ufw没有启用，并且/etc/mysql/my.cnf中没有绑定到localhost（事实上除了两个包含语句之外没有任何内容）。有人建议如何排除故障吗？
编辑：
lsof命令产生：
steve@steve-MS-7253:~$ lsof -nP -i :3306
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
mysql-wor 28172 steve 22u IPv4 254049 0t0 TCP 127.0.0.1:56712->127.0.0.1:3306 (ESTABLISHED)
mysql-wor 28172 steve 23u IPv4 253520 0t0 TCP 127.0.0.1:56710->127.0.0.1:3306 (ESTABLISHED)
/etc/mysql/my.cnf包含
!includedir /etc/mysql/conf.d/
!includedir /etc/mysql/mysql.conf.d/
/etc/mysql/conf.d/mysql.cnf仅包含[mysql]
/etc/mysql/mysql.conf.d/mysqld.cnf包含
#
# The MySQL database server configuration file.
#
# You can copy this to one of:
# - "/etc/mysql/my.cnf" to set global options,
# - "~/.my.cnf" to set user-specific options.
#
# One can use all long options that the program supports.
# Run program with --help to get a list of available options and with
# --print-defaults to see which it would actually understand and use.
#
# For explanations see
# http://dev.mysql.com/doc/mysql/en/server-system-variables.html
# This will be passed to all mysql clients
# It has been reported that passwords should be enclosed with ticks/quotes
# escpecially if they contain "#" chars...
# Remember to edit /etc/mysql/debian.cnf when changing the socket location.
# Here is entries for some specific programs
# The following values assume you have at least 32M ram
[mysqld_safe]
socket = /var/run/mysqld/mysqld.sock
nice = 0
[mysqld]
#
# * Basic Settings
#
user = mysql
pid-file = /var/run/mysqld/mysqld.pid
socket = /var/run/mysqld/mysqld.sock
port = 3306
basedir = /usr
datadir = /var/lib/mysql
tmpdir = /tmp
lc-messages-dir = /usr/share/mysql
skip-external-locking
#
# Instead of skip-networking the default is now to listen only on
# localhost which is more compatible and is not less secure.
bind-address = 127.0.0.1
#
# * Fine Tuning
#
key_buffer_size = 16M
max_allowed_packet = 16M
thread_stack = 192K
thread_cache_size = 8
# This replaces the startup script and checks MyISAM tables if needed
# the first time they are touched
myisam-recover-options = BACKUP
#max_connections = 100
#table_cache = 64
#thread_concurrency = 10
#
# * Query Cache Configuration
#
query_cache_limit = 1M
query_cache_size = 16M
#
# * Logging and Replication
#
# Both location gets rotated by the cronjob.
# Be aware that this log type is a performance killer.
# As of 5.1 you can enable the log at runtime!
#general_log_file = /var/log/mysql/mysql.log
#general_log = 1
#
# Error log - should be very few entries.
#
log_error = /var/log/mysql/error.log
#
# Here you can see queries with especially long duration
#log_slow_queries = /var/log/mysql/mysql-slow.log
#long_query_time = 2
#log-queries-not-using-indexes
#
# The following can be used as easy to replay backup logs or for replication.
# note: if you are setting up a replication slave, see README.Debian about
# other settings you may need to change.
#server-id = 1
#log_bin = /var/log/mysql/mysql-bin.log
expire_logs_days = 10
max_binlog_size = 100M
#binlog_do_db = include_database_name
#binlog_ignore_db = include_database_name
#
# * InnoDB
#
# InnoDB is enabled by default with a 10MB datafile in /var/lib/mysql/.
# Read the manual for more InnoDB related options. There are many!
#
# * Security Features
#
# Read the manual, too, if you want chroot!
# chroot = /var/lib/mysql/
#
# For generating SSL certificates I recommend the OpenSSL GUI "tinyca".
#
# ssl-ca=/etc/mysql/cacert.pem
# ssl-cert=/etc/mysql/server-cert.pem
# ssl-key=/etc/mysql/server-key.pem
答案 0 :(得分：1)
使用lsof命令确认MySQL正在侦听所需的地址和端口。一个快速命令是：
# lsof -nP -i :3306
您应该看到类似于：
的行mysqld 3225 mysql 11u IPv4 20260 0t0 TCP *:3306 (LISTEN)
上面输出中的'*：3306'表示MySQL绑定到端口3306上的所有接口。
获取MySQL进程的PID后的替代方法是：
# lsof -nP -p 3225 | grep LISTEN
mysqld 3225 mysql 11u IPv4 20260 0t0 TCP *:3306 (LISTEN)
包含/etc/mysql/my.cnf文件的内容以及所包含目录中的任何配置文件（使用用户名/密码进行模糊处理）都会有所帮助。