sudo mysqld_multi report
Reporting MySQL servers
MySQL server from group: mysqld1 is not running
MySQL server from group: mysqld2 is not running
MySQL server from group: mysqld2 is not running

[client]
port        = 3306
socket      = /var/lib/mysql/mysql.sock

[mysqld_safe]
socket      = /var/lib/mysql/mysql.sock
nice        = 0

[mysqld]
user        = mysql
pid-file    = /var/run/mysqld/mysqld.pid
socket      = /var/lib/mysql/mysql.sock
port        = 3306
basedir     = /usr
datadir     = /var/lib/mysql
tmpdir      = /tmp
lc-messages-dir = /usr/share/mysql
skip-external-locking
key_buffer      = 16M
max_allowed_packet  = 16M
thread_stack        = 192K
thread_cache_size       = 8
myisam-recover         = BACKUP
query_cache_limit   = 1M
query_cache_size        = 16M
log_error = /var/log/mysql/error.log

[mysqld_multi]
mysqld = /usr/bin/mysqld_safe
mysqladmin = /usr/bin/mysqladmin
user = root
password =

[mysqld1]
server-id           = 3
socket              = /var/run/mysqld/mysqld_1.sock
port                = 3307
pid-file            = /var/run/mysqld/mysqld_1.pid
datadir             = /var/lib/mysql_1
user                = mysql
log_bin             = /var/log/mysql_1/mysql-bin.log
expire_logs_days    = 10
max_binlog_size     = 100M
binlog_do_db        = db1

[mysqld2]
server-id           = 4
socket              = /var/run/mysqld/mysqld_2.sock
port                = 3308
pid-file            = /var/run/mysqld/mysqld_2.pid
datadir             = /var/lib/mysql_2
user                = mysql
log_bin             = /var/log/mysql_2/mysql-bin.log
expire_logs_days    = 10
max_binlog_size     = 100M
binlog_do_db        = db3
binlog_do_db        = db4

[mysqldump]
quick
quote-names
max_allowed_packet  = 1600M

[mysql]
#no-auto-rehash # faster start of mysql but no tab completition

[isamchk]
key_buffer      = 16M

!includedir /etc/mysql/conf.d/