原始碼編譯安裝MySQL-5.6/mysql-5.6.39------踩了無數坑，重灌了十幾次伺服器才會的,不容易啊！
1.切換到src目錄
cd /usr/local/src/
2. 下載mysql免編譯二進位制包
免編譯的mysql二進位制包5.6原始碼包：
wget http://mirrors.163.com/mysql/Downloads/MySQL-5.6/mysql-5.6.39-linux-glibc2.12-x86_64.tar.gz
tar -zxvf http://mirrors.163.com/mysql/Downloads/MySQL-5.6/mysql-5.6.39-linux-glibc2.12-x86_64.tar.gz
3. 把 mysql-5.6.39-linux-glibc2.12-x86_64.tar.gz目錄下所有檔案 移到 /usr/local/mysql 位置
mv mysql-5.6.39-linux-glibc2.12-x86_64.tar.gz/* /usr/local/mysql
4.建立MySql使用者,因為啟動MySQL需要改使用者
useradd -s /sbin/nologin mysql
cd /usr/local/mysql
5.建立datadir，資料庫檔案會放到這裡面
mkdir -p /data/mysql
6. 更改許可權,不更改後續操作就會出問題
chown -R mysql:mysql /data/mysql
7. yum install libaio* -y
二進位制安裝mysql初始化出現：Installing MySQL system tables.../usr/local/mysql/bin/mysqld: error while loading shared
原因：缺少libaio庫檔案
解決方法：yum install libaio* -y
8. yum -y install numactl
bin/mysqld: error while loading shared libraries: libnuma.so.1: 安裝mysql
如果安裝mysql出現了以上的報錯資訊.這是卻少numactl這個時候如果是Centos就yum -y install numactl就可以解決這個問題了.
ubuntu的就sudo apt-get install numactl就可以解決這個問題了
9. 編譯安裝
./scripts/mysql_install_db --user=mysql --datadir=/data/mysql
如果接下來你看到兩個ok,並且會在/data/mysql目錄下生成幾個檔案和目錄,說明執行成功;或者在執行完成最後一條命令後,馬上執行echo $? 看輸出結果是否為0
10. 首先賦值配置檔案,如下所示:
cp support-files/my-default.cnf /etc/my.cnf
cp:是否覆蓋"/etc/my.cnf"? y
因為是系統預設就有/etc/my.cnf，所以會提示是否覆蓋,直接按"y"即可,
11. 修改配置檔案 ,如下所示:
vim /etc/my.cnf
---------------------------------------------------------------------------------------------------------------------------------------------
[mysqld]
# Remove leading # and set to the amount of RAM for the most important data
# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.
innodb_buffer_pool_size = 128M
# Remove leading # to turn on a very important data integrity option: logging
# changes to the binary log between backups.
log_bin = ahui
# These are commonly set, remove the # and set as required.
basedir = /usr/local/mysql
datadir = /data/mysql
port = 3306
server_id = 128
socket = /tmp/mysql.sock
# Remove leading # to set options mainly useful for reporting servers.
# The server defaults are faster for transactions and fast SELECTs.
# Adjust sizes as needed, experiment to find the optimal values.
join_buffer_size = 128M
sort_buffer_size = 2M
read_rnd_buffer_size = 2M
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
----------------------------------------------------------------------------------------------------------------------
12. 然後複製啟動指令碼檔案並修改其屬性
cp support-files/mysql.server /etc/init.d/mysqld
chmod 755 /etc/init.d/mysqld
13. 修改啟動指令碼
vim /etc/init.d/mysqld
需要修改的地方有 datadir=/data/mysql
14. 把啟動指令碼加入系統服務項,設定開機並啟動mysql
a . 把mysqld服務加入到系統服務列表中,
chkconfig --add mysqld
b .使其開機就啟動
chkconfig mysqld on
c .啟動服務
service mysqld start
看見success,說明mysql已經啟動成功了
15. 看看有沒有監聽3306埠
netstat -lnp|grep 3306
16.進入mysql
/usr/local/mysql/bin/mysql -u root
show databases;
17. Linux下修改Mysql的使用者(root)的密碼 (第一次進入需要密碼，直接mysql -uroot -p 進來該密碼)
通過登入mysql系統，
# mysql -uroot -p
Enter password: 【輸入原來的密碼】
mysql>use mysql;
mysql> update user set password=passworD("test") where user='root';
mysql> flush privileges;
mysql> exit;