Linux下手動安裝MySQL5 7

# 解壓

tar -xvf mysql-5.7.22-linux-glibc2.12-x86_64.tar.gz

mv /usr/local/mysql-5.7.22-linux-glibc2.12-x86_64 /usr/local/mysql

mkdir /usr/local/mysql/data

# mysql使用者組

groupadd mysql

# mysql使用者

useradd mysql -g mysql

chown -r mysql.mysql /usr/local/mysql

/usr/local/mysql/bin/mysql_install_db --user=mysql --basedir=/usr/local/mysql/ --datadir=/usr/local/mysql/data

如果出現以下錯誤：

2018-07-14 06:40:32 [warning] mysql_install_db is deprecated. please consider switching to mysqld --initialize

2018-07-14 06:40:32 [error]   child process: /usr/local/mysql/bin/mysqldterminated prematurely with errno= 32
2018-07-14 06:40:32 [error]   failed to execute /usr/local/mysql/bin/mysqld --bootstrap --datadir=/usr/local/mysql/data --lc-messages-dir=/usr/local/mysql/share --lc-messages=en_us --basedir=/usr/local/mysql

則使用以下命令（記得把上面命令生成的data檔案內容刪掉）：

/usr/local/mysql/bin/mysqld --user=mysql --basedir=/usr/local/mysql/ --datadir=/usr/local/mysql/data --initialize

如果出現以下錯誤：

/usr/local/mysql/bin/mysqld: error while loading shared libraries: libnuma.so.1: cannot open shared object file: no such file or directory

yum -y install numactl

完成後重複上個步驟，繼續安裝（同樣把上面data檔案內容刪掉）：

[mysqld]

datadir=/usr/local/mysql/data
basedir=/usr/local/mysql
socket=/tmp/mysql.sock
user=mysql
port=3306character-set-server=utf8
# 取消密碼驗證
skip-grant-tables
# disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0# skip-grant-tables
[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid

# 將mysql加入服務

cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysql

# 開機自啟

chkconfig mysql on

# 開啟

service mysql start

(有時候回報如下錯誤：

1.service mysql start;

報錯：mysql is neither service nor target!?

2.systemctl start mysql:

報錯：sysemctl start  mysql ： failed to star mysql.service: unit mysql.service failed to load: no such file ....)

解決方案：依次執行下面命令

systemctl unmask mysql.service

service mysql start

# 登入（由於/etc/my.cnf中設定了取消密碼驗證，所以此處密碼任意）

/usr/local/mysql/bin/mysql -u root -p

# 操作mysql資料庫

>>use mysql;

# 修改密碼

>>update user set authentication_string=password('你的密碼') where user='root';

>>flush privileges;

>>exit;

/usr/local/mysql/bin/mysql -u root -p

>>alter user 'root'@'localhost' identified by '修改後的密碼';

>>exit;

/usr/local/mysql/bin/mysql -u root -p

>>use mysql;

>>update user set host='%' where user = 'root';

>>flush privileges;

>>eixt;

如果不行，直接關掉linux的防火牆。

systemctl disable firewalld

這樣還不行的話，檢查伺服器入棧入棧規則。

ln -s /usr/local/mysql/bin/mysql /usr/bin

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