ln -sf /mysql/data/3306/my.cnf /etc/my.cnf

这是一个 Linux 命令，它的作用是创建一个软链接，将 /mysql/data/3306/my.cnf 这个文件链接到 /etc/my.cnf 这个位置。这样，在访问 /etc/my.cnf 文件时实际上是访问了 /mysql/data/3306/my.cnf 文件。这个命令通常用于将某个配置文件链接到一个固定的位置，方便程序或系统的访问。

相关问题

-e /etc/my.cnf

根据提供的引用内容，可以看出在安装MySQL的Docker容器时，使用了"-e /etc/my.cnf"这个选项。然而，根据引用\[1\]和引用\[2\]中的命令，没有看到使用"-e /etc/my.cnf"这个选项。而引用\[3\]中提到，文件"/etc/my.cnf"在安装Percona-Server-shared-56-5.6.48-rel88.0.1.el7.x86_64时与文件"mysql-community-server-5.7.30-1.el7.x86_64"发生了冲突。因此，根据提供的信息，无法确定"-e /etc/my.cnf"选项的具体含义和作用。
#### 引用[.reference_title]
- *1* *2* [docker 安装mysql mysqld: Can‘t read dir of ‘/etc/my.cnf.d‘ (OS errno 2 - No such file or ...](https://blog.csdn.net/weixin_40841731/article/details/122111820)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^control_2,239^v3^insert_chatgpt"}} ] [.reference_item]
- *3* [[Zabbix5.0]Transaction check error: file /etc/my.cnf from install of Percona-Server-shared-56-5.6.48...](https://blog.csdn.net/weixin_28952093/article/details/113599447)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^control_2,239^v3^insert_chatgpt"}} ] [.reference_item]
[ .reference_list ]

ubuntu mysql8.0.32 /etc/mysql/my.cnf 文件内容

以下是在Ubuntu系统上安装MySQL 8.0.32后的默认 /etc/mysql/my.cnf 文件内容：

# 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

[mysqld]
#
# * Basic Settings
#
user                           = mysql
pid-file                       = /var/run/mysqld/mysqld.pid
socket                         = /var/run/mysqld/mysqld.sock
basedir                        = /usr
datadir                        = /var/lib/mysql
tmpdir                         = /tmp
lc-messages-dir                = /usr/share/mysql
#skip-external-locking
skip-name-resolve
skip-host-cache
skip-ssl
sql-mode                       = ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION
log-error                      = /var/log/mysql/error.log

# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0

# Recommended in standard MySQL setup
# sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES

#
# * Character sets
#
# MySQL/MariaDB default is Latin1, but in Ubuntu UTF-8 is default
#
character-set-server  = utf8mb4
collation-server      = utf8mb4_general_ci

#
# * 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 you can use for example the GUI tool "tinyca".
#
# ssl-ca=/etc/mysql/cacert.pem
# ssl-cert=/etc/mysql/server-cert.pem
# ssl-key=/etc/mysql/server-key.pem

[mysql]
#
# * Basic Settings
#
socket                         = /var/run/mysqld/mysqld.sock
prompt                         = \u@\h [\d]>\_

[mysqldump]
#
# * Basic Settings
#
socket                         = /var/run/mysqld/mysqld.sock
quick
quote-names
max_allowed_packet             = 16M

[isamchk]
key_buffer                     = 16M

#
# * IMPORTANT: Additional settings that can override those from this file!
#   The files must end with '.cnf', otherwise they'll be ignored.
#
!includedir /etc/mysql/conf.d/

注意，这只是默认的配置文件，实际上你可以根据需要进行修改。