Mac上安装Mysql配置文件的添加及修改配置文件

大家好，又见面了，我是你们的朋友全栈君。

安装

Mysql默认安装在/usr/local目录下，这个目录可以通过command+shift+G进入：

进入后选择mysql安装文件夹。

配置文件

Mac上Mysql默认没有配置文件，需要自己添加，可以support-file 文件目录下的my-default.cnf复制一份到桌面上，可以把文件中的内容全部替换为一下内容

# Example MySQL config file for small systems. 
# 
# This is for a system with little memory (<= 64M) where MySQL is only used 
# from time to time and it's important that the mysqld daemon 
# doesn't use much resources. 
# 
# MySQL programs look for option files in a set of 
# locations which depend on the deployment platform. 
# You can copy this option file to one of those 
# locations. For information about these locations, see: 
# http://dev.mysql.com/doc/mysql/en/option-files.html 
# 
# In this file, you can use all long options that a program supports. 
# If you want to know which options a program supports, run the program 
# with the "--help" option. 

# The following options will be passed to all MySQL clients 
[client]  
default-character-set=utf8  
#password = your_password 
port        = 3306 
socket      = /tmp/mysql.sock  

# Here follows entries for some specific programs 

# The MySQL server 
[mysqld]  
default-storage-engine=INNODB  
character-set-server=utf8  
collation-server=utf8_general_ci  
port        = 3306 
socket      = /tmp/mysql.sock  
skip-external-locking  
key_buffer_size = 16K  
max_allowed_packet = 1M  
table_open_cache = 4 
sort_buffer_size = 64K  
read_buffer_size = 256K  
read_rnd_buffer_size = 256K  
net_buffer_length = 2K  
thread_stack = 128K  

# Don't listen on a TCP/IP port at all. This can be a security enhancement, 
# if all processes that need to connect to mysqld run on the same host. 
# All interaction with mysqld must be made via Unix sockets or named pipes. 
# Note that using this option without enabling named pipes on Windows 
# (using the "enable-named-pipe" option) will render mysqld useless! 
# 
#skip-networking 
server-id   = 1 

# Uncomment the following if you want to log updates 
#log-bin=mysql-bin 

# binary logging format - mixed recommended 
#binlog_format=mixed 

# Causes updates to non-transactional engines using statement format to be 
# written directly to binary log. Before using this option make sure that 
# there are no dependencies between transactional and non-transactional 
# tables such as in the statement INSERT INTO t_myisam SELECT * FROM 
# t_innodb; otherwise, slaves may diverge from the master. 
#binlog_direct_non_transactional_updates=TRUE 

# Uncomment the following if you are using InnoDB tables 
#innodb_data_home_dir = /usr/local/mysql/data 
#innodb_data_file_path = ibdata1:10M:autoextend 
#innodb_log_group_home_dir = /usr/local/mysql/data 
# You can set .._buffer_pool_size up to 50 - 80 % 
# of RAM but beware of setting memory usage too high 
#innodb_buffer_pool_size = 16M 
#innodb_additional_mem_pool_size = 2M 
# Set .._log_file_size to 25 % of buffer pool size 
#innodb_log_file_size = 5M 
#innodb_log_buffer_size = 8M 
#innodb_flush_log_at_trx_commit = 1 
#innodb_lock_wait_timeout = 50 

[mysqldump]  
quick  
max_allowed_packet = 16M  

[mysql]  
no-auto-rehash  
# Remove the next comment character if you are not familiar with SQL 
#safe-updates 

[myisamchk]  
key_buffer_size = 8M  
sort_buffer_size = 8M  

[mysqlhotcopy]  
interactive-timeout 

来源：https://www.tuicool.com/articles/QBFZV3R
然后保存，将文件名my-default.cnf 改为my.cnf,然后将其放到etc目录下，关于如何进入etc目录，和前面的方法一样：

注意，这个etc目录不是在Mysql安装目录下的，所以在安装目录下找不到！然后重启Mysql即可。

后续配置文件的修改

如果以后还要修改配置文件中的内容怎么办？也是找到etc目录下的my.cnf文件，如果直接打开编辑，会发现没有修改权限。当然，有一种方法是和前面一样，把文件复制到桌面上，修改里面的内容，然后重新替换掉原来etc目录下的文件，还有一种解决方法：通过控制台用vim打开该文件,在控制台输入如下指令：

cd /private/etc
sudo vim my.cnf

然后输入开机密码，即可打开my.cnf :

打开后按下键盘I，最下方会出现INSERT 单词，进入编辑模式，代表现在可以修改该文件，只需要修改你想修改的配置即可，注意要在英文输入的状态下按键盘I，修改完成后按下esc,退出编辑模式。然后按下shift+Q,输入wq 保存并退出：

常用指令：

:wq   保存后退出vim
:wq!  强制储存后退出
:w    保存但不退出
:w!   若文件属性为只读时，强制写入该档案
:q    退出vi
:q!   若曾修改过档案，又不想储存，使用 ! 为强制离开不储存档案。