服務器維護CentOS 7安裝 MySQL5.7.19
2020-06-07 13:47 作者:admin
如何做好
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服務器維護信息
服務器維護小知識環境:虛擬機+
CentOS 7
服務器維護小知識1.下載二進制包,下面mysql-5.7.19-linux-glibc2.12-x86_64.tar.gz鏈接是官網
cd /usr/local/src
wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-5.7.19-linux-glibc2.12-x86_64.tar.gz
服務器維護小知識2.解壓,改名
[root@beta src]# tar zxvf mysql-5.7.19-linux-glibc2.12-x86_64.tar.gz
[root@beta src]# ls
index.html?id=471614 mysql-5.7.19-linux-glibc2.12-x86_64 mysql-5.7.19-linux-glibc2.12-x86_64.tar.gz
[root@beta src]# mv mysql-5.7.19-linux-glibc2.12-x86_64 /usr/local/mysql
服務器維護小知識3. 初始化
[root@beta mysql]# useradd -M -s /sbin/nologin mysql
[root@beta mysql]# ls
bin COPYING docs include lib man README share support-files
[root@beta mysql]# mkdir -p /usr/local/mysql/data/mysql
[root@beta mysql]# chown mysql /usr/local/mysql/data/mysql
下面這步注意最后一句:
[root@beta mysql]# ./bin/mysqld --initialize --user=mysql --datadir=/usr/local/mysql/data/mysql
2017-09-27T03:44:47.999985Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2017-09-27T03:44:49.011240Z 0 [Warning] InnoDB: New log files created, LSN=45790
2017-09-27T03:44:49.180334Z 0 [Warning] InnoDB: Creating foreign key constraint system tables.
2017-09-27T03:44:49.245777Z 0 [Warning] No existing UUID has been found, so we assume that this is the first time that this server has been started. Generating a new UUID: 3649ce8c-a336-11e7-a43f-000c292b2832.
2017-09-27T03:44:49.266053Z 0 [Warning] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened.
2017-09-27T03:44:49.268172Z 1 [Note] A temporary password is generated for root@localhost: ADB&yGx-d8ab
ADB&yGx-d8ab 是密碼
接著執行:
[root@beta mysql]# ./bin/mysql_ssl_rsa_setup --datadir=usr/local/mysql/data/mysql
Generating a 2048 bit RSA private key
......................+++
...+++
writing new private key to 'ca-key.pem'
-----
Generating a 2048 bit RSA private key
.........................+++
...............................................................................+++
writing new private key to 'server-key.pem'
-----
Generating a 2048 bit RSA private key
....................+++
.......................+++
writing new private key to 'client-key.pem'
服務器維護小知識4. 拷貝配置文件和啟動腳本
1. 先檢查是否有/etc/my.cnf,如果沒有
cp support-files/my-default.cnf /etc/my.cnf
編輯/etc/my.cnf,重點修改下面幾個,其他的盡量注釋掉:
basedir = /usr/local/mysql
datadir = //usr/local/mysql/data/mysql
socket = /tmp/mysql.sock
2.啟動腳本
cp support-files/mysql.server /etc/init.d/mysqld
編輯/etc/init.d/mysqld,只修改下面幾個:
basedir=/usr/local/mysql
datadir=/data/mysql
將/etc/init.d/mysqld加入啟動項:
[root@beta mysql]# chkconfig --add mysqld
[root@beta mysql]# chkconfig --list
注意:該輸出結果只顯示 SysV 服務,并不包含原生 systemd 服務。SysV 配置數據可能被原生 systemd 配置覆蓋。
如果您想列出 systemd 服務,請執行 'systemctl list-unit-files'。
欲查看對特定 target 啟用的服務請執行
'systemctl list-dependencies [target]'。
mysqld 0:關 1:關 2:開 3:開 4:開 5:開 6:關
netconsole 0:關 1:關 2:關 3:關 4:關 5:關 6:關
network 0:關 1:關 2:開 3:開 4:開 5:開 6:關
· 5. 啟動服務
/etc/init.d/mysqld start
· 6.設置root密碼
1. 用初始密碼登陸(見上面第3步)
/usr/local/mysql/bin/mysql -uroot -p‘初始密碼’ #-p和’’不能隔開
出現mysql>的時候,輸入set password = password('新密碼');
退出,用新密碼登陸
2. 忘記初始密碼
給/etc/my.cnf/[mysqld]下面增加一行skip-grant-tables,重啟 mysqld:/etc/init.d/mysqld restart
[mysqld]
skip-grant-tables
basedir=/usr/local/mysql
datadir=/usr/local/mysql/data/mysql
socket=/tmp/mysql.sock
[root@beta ~]# /etc/init.d/mysqld restart
Shutting down MySQL.. SUCCESS!
Starting MySQL.. SUCCESS!
重新登錄 mysql:
[root@beta ~]# /usr/local/mysql/bin/mysql -uroot
mysql>后輸入:update mysql.user set authentication_string=password('123333') where user='root';
mysql> update mysql.user set authentication_string=password('123333') where user='root';
Query OK, 1 row affected, 1 warning (0.00 sec)
Rows matched: 1 Changed: 1 Warnings: 1
退出,刪除 my.cnf 加入的skip-grant-tables,重啟mysqld
新密碼重新登錄 mysql:
[root@beta ~]# /usr/local/mysql/bin/mysql -uroot -p'123333'
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 13
Server version: 5.7.19 MySQL Community Server (GPL)
Copyright (c) 2000, 2017,
Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql>
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