linux下安装mysql详细步骤详解程序员

最近买了个阿里云服务器,搭建mysql环境。

该笔记用于系统上未装过mysql的干净系统第一次安装mysql。自己指定安装目录,指定数据文件目录。

linux系统版本: CentOS 7.3 64位

安装源文件版本:mysql-advanced-5.6.24-linux-glibc2.5-x86_64.tar.gz

mysql安装位置:/opt/mysql

数据库文件数据位置:/opt/mysql/data

 

==================================================================

卸载老的mysql

a、查看是否安装了mysql

rpm -qa|grep -i mysql

b、删除mysql

rpm -e –nodeps 包名(rpm -ev mysql-4.1.12-3.RHEL4.1)

c、删除老版本 mysql 的开发头文件

命令:
rm -fr /usr/lib/mysql
rm -fr /usr/include/mysql
注意:卸载后/var/lib/mysql 中的数据及/etc/my.cnf 不会删除,如果确定没用后就手工删除
rm -f /etc/my.cnf
rm -fr /var/lib/mysql

==================================================================

 

注:未防止混淆,这里都用绝对路径执行命令

        除了文件内容中的#,这里所有带#都是linux命令

  >mysql 是mysql的命令

 

步骤:

1、在根目录下创建文件夹/opt/mysql/和数据库数据文件 /opt/mysql/data

#mkdir /opt/mysql/

#mkdir /opt/mysql/data

 

2、上传mysql-5.7.23-linux-glibc2.12-x86_64.tar.gz文件到/opt/mysql下

 

#cd /opt/mysql

#tar -xzvf mysql-5.7.23-linux-glibc2.12-x86_64.tar.gz

 

3、更改解压缩后的文件夹名称

#mv /opt/mysql/mysql-5.7.23-linux-glibc2.12-x86_64/  /opt/mysql/mysql_install

 

4、创建mysql用户组和mysql用户

#groupadd mysql

#useradd -r -g mysql mysql

 

5、关联myql用户到mysql用户组中

#chown -R mysql:mysql  /opt/mysql/

#chown -R mysql:mysql  /opt/mysql/data

#chown -R mysql  /opt/mysql/

#chown -R mysql  /opt/mysql/data

 

6、更改mysql安装文件夹mysql/的权限

#chmod -R 755 /opt/mysql

 

7、安装libaio依赖包,由于我买的腾讯云服务器centos系统自带的有这个依赖包所以不需要安装,不过自带的依赖包会报错,后面介绍解决办法

查询是否暗转libaio依赖包

#yum search libaio

如果没安装,可以用下面命令安装

#yum install libaio

 

8、初始化mysql命令

#cd /opt/mysql/mysql_install/bin

#./mysqld –user=mysql –basedir=/opt/mysql/ –datadir=/opt/mysql/data –initialize

在执行上面命令时特别要注意一行内容   

[Note]A temporary password is generated for [email protected]: pyCK.oLu#5,f

[email protected]: 后面跟的是mysql数据库登录的临时密码,各人安装生成的临时密码不一样

如果初始化时报错如下:

error while loading shared libraries: libnuma.so.1: cannot open shared objec

是因为libnuma安装的是32位,我们这里需要64位的,执行下面语句就可以解决

#yum install numactl.x86_64

执行完后重新初始化mysql命令

 

9、启动mysql服务

# sh /opt/mysql/mysql_install/support-files/mysql.server start

上面启动mysql服务命令是会报错的,因为没有修改mysql的配置文件,报错内容大致如下:

./support-files/mysql.server: line 239: my_print_defaults: command 
not 
found
./support-files/mysql.server: line 259: cd: /usr/
local
/mysql: 
No 
such file 
or 
directory
Starting MySQL ERROR! Couldn't find MySQL server (/usr/
local
/mysql/bin/mysqld_safe)
 
 
10、修改Mysql配置文件
#vim /opt/mysql/mysql_install/support-files/mysql.server
添加以下内容

if test -z “$basedir”
then
basedir=/opt/mysql
bindir=/opt/mysql/mysql_install/bin
if test -z “$datadir”
then
datadir=/opt/mysql/data
fi
sbindir=/opt/mysql/mysql_install/bin
libexecdir=/opt/mysql/mysql_install/bin
else
bindir=”$basedir/mysql_install/bin”
if test -z “$datadir”
then
datadir=”$basedir/data”
fi
sbindir=”$basedir/sbin”
libexecdir=”$basedir/libexec”
fi

保存退出

#cp /opt/mysql/mysql_install/support-files/mysql.server  /etc/init.d/mysqld
#chmod 755 /etc/init.d/mysqld

11、修改my.cnf文件

#vi /etc/my.cnf

将下面内容复制替换当前的my.cnf文件中的内容

[client]
no-beep
socket =/opt/mysql/mysql.sock
# pipe
# socket=0.0
port=3306
[mysql]
default-character-set=utf8
[mysqld]
basedir=/opt/mysql
datadir=/opt/mysql/data
port=3306
pid-file=/opt/mysql/mysqld.pid
#skip-grant-tables
skip-name-resolve
socket = /opt/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 = /opt/mysql/data
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

保存退出

 

12、启动mysql

#/etc/init.d/mysqld start

新版本的安装包会报错,错误内容如下:

Starting MySQL.Logging to ‘/data/mysql/SZY.err’.
2018-07-02T10:09:03.779928Z mysqld_safe The file /usr/local/mysql/bin/mysqld
does not exist or is not executable. Please cd to the mysql installation
directory and restart this script from there as follows:
./bin/mysqld_safe&
See http://dev.mysql.com/doc/mysql/en/mysqld-safe.html for more information
ERROR! The server quit without updating PID file (/software/mysql/mysqld.pid).

因为新版本的mysql安全启动安装包只认/usr/local/mysql这个路径。

解决办法:

方法1、建立软连接

例 #cd /usr/local/mysql

#ln -s /sofware/mysql/bin/myslqd mysqld

 

方法2、修改mysqld_safe文件(有强迫症的同学建议这种,我用的这种)

# vim /opt/mysql/mysql_install/bin/mysqld_safe

将所有的/usr/local/mysql改为/opt/mysql

保存退出。(可以将这个文件拷出来再修改然后替换)

 

13、登录mysql

#/opt/mysql/mysql_install/bin/mysql -u root –p

 

[email protected]:后面的内容

 

15、修改mysql的登录密码

>mysql   set password=password(‘root’);

>mysql  grant all privileges on *.* to root@’%’ identified by ‘root’;

>mysql flush privileges;

 

16、完成,此时mysql的登录名root  登录密码root

原创文章,作者:Maggie-Hunter,如若转载,请注明出处:https://blog.ytso.com/6584.html

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