阿里云使用mysql默认端口号3306会提示高危规则
高危规则
所以需要修改一下端口号
查看端口号是否被占用
# netstat -anp | grep [端口号]
查看3306结果
主要看监控状态为LISTEN表示已经被占用，最后一列显示被服务mysqld占用
查看所有端口号占用情况
# netstat -nultp
修改mysql端口号
# vi /etc/my.cnf // 编辑文件
添加或修改为port=2222
例如
[client]
no-beep
socket =/software/mysql/mysql.sock
# pipe
# socket=0.0
port=2222 // 这里这里，看这里
[mysql]
default-character-set=utf8
[mysqld]
basedir=/software/mysql
datadir=/file/data/mysql
port=2222 // 这里这里，看这里
pid-file=/software/mysql/mysqld.pid
#skip-grant-tables
skip-name-resolve
socket = /software/mysql/mysql.sock
character-set-server=utf8
default-storage-engine=INNODB
explicit_defaults_for_timestamp = true
# Server Id.
server-id=1
max_connections=2000
query_cache_size=0
table_open_cache=2000
tmp_table_size=246M
thread_cache_size=300
#限定用于每个数据库线程的栈大小。默认设置足以满足大多数应用
thread_stack = 192k
key_buffer_size=512M
read_buffer_size=4M
read_rnd_buffer_size=32M
innodb_data_home_dir = /file/data/mysql
innodb_flush_log_at_trx_commit=0
innodb_log_buffer_size=16M
innodb_buffer_pool_size=256M
innodb_log_file_size=128M
innodb_thread_concurrency=128
innodb_autoextend_increment=1000
innodb_buffer_pool_instances=8
innodb_concurrency_tickets=5000
innodb_old_blocks_time=1000
innodb_open_files=300
innodb_stats_on_metadata=0
innodb_file_per_table=1
innodb_checksum_algorithm=0
back_log=80
flush_time=0
join_buffer_size=128M
max_allowed_packet=1024M
max_connect_errors=2000
open_files_limit=4161
query_cache_type=0
sort_buffer_size=32M
table_definition_cache=1400
binlog_row_event_max_size=8K
sync_master_info=10000
sync_relay_log=10000
sync_relay_log_info=10000
#批量插入数据缓存大小，可以有效提高插入效率，默认为8M
bulk_insert_buffer_size = 64M
interactive_timeout = 120
wait_timeout = 120
log-bin-trust-function-creators=1
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
#
# include all files from the config directory
#
!includedir /etc/my.cnf.d
然后重启mysql
# /etc/init.d/mysqld restart
参考：
1.LINUX中如何查看某个端口是否被占用
