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本文為大家分享了centOS下安裝mysql5.7詳細步驟，供大家參考，具體內容如下
第一步：
第一句檢測系統是否自帶安裝mysql，若有執行第二句刪除系統自帶的mysql及其依賴。
yum list installed | grep mysql yum -y remove mysql-libs.x86_64
第二步：
給CentOS添加rpm源，并且選擇較新的源，下面代碼逐句執行
wget dev.mysql.com/get/mysql-community-release-el6-5.noarch.rpm yum localinstall mysql-community-release-el6-5.noarch.rpm yum repolist all | grep mysql yum-config-manager --disable mysql55-community yum-config-manager --disable mysql56-community yum-config-manager --enable mysql57-community-dmr yum repolist enabled | grep mysql
第三步：
安裝mysql 服務器
yum install mysql-community-server
第四步：
service mysqld start
第五步：
查看mysql是否自啟動,并且設置開啟自啟動
chkconfig --list | grep mysqld chkconfig mysqld on
第六步：
這一步很重要！！！
不知道從mysql哪個版本開始，mysql的root默認密碼就不為空了，在安裝的過程中默認密碼保存在安裝日志中了。我們要通過安裝日志找到默認密碼，用默認密碼登陸mysql成功后會強行讓你修改密碼，修改的密碼還要夠復雜(復合mysql默認的密碼策略)才能修改成功，一般帶大小寫字母特殊字符和數字超過8個字符就可以。
首先找到安裝日志
find / -name mysqld.log
然后發現該日志文件路徑在 /var/log/mysqld.log。然后用下面命令打開，按‘i'鍵上翻
vim /var/log/mysqld.log
上圖紅色地方就是root密碼所在地
第七步：
mysql安全設置
mysql_secure_installation
輸入上面命令進行下面步驟
SERVERS IN PRODUCTION USE! PLEASE READ EACH STEP CAREFULLY! In order to log into MySQL to secure it, we'll need the current password for the root user. If you've just installed MySQL, and you haven't set the root password yet, the password will be blank, so you should just press enter here. Enter current password for root (enter for none):<–初次運行，輸入剛剛找到的初始密碼，會強制你先修改密碼才能進行下去 OK, successfully used password, moving on… Setting the root password ensures that nobody can log into the MySQL root user without the proper authorisation. Set root password? [Y/n] <– 是否設置root用戶密碼，輸入y并回車或直接回車 New password: <– 設置root用戶的密碼 Re-enter new password: <– 再輸入一次你設置的密碼 Password updated successfully! Reloading privilege tables.. … Success! By default, a MySQL installation has an anonymous user, allowing anyone to log into MySQL without having to have a user account created for them. This is intended only for testing, and to make the installation go a bit smoother. You should remove them before moving into a production environment. Remove anonymous users? [Y/n] <– 是否刪除匿名用戶,生產環境建議刪除，所以直接回車 … Success! Normally, root should only be allowed to connect from 'localhost'. This ensures that someone cannot guess at the root password from the network. Disallow root login remotely? [Y/n] <–是否禁止root遠程登錄,根據自己的需求選擇Y/n并回車,建議禁止 … Success! By default, MySQL comes with a database named 'test' that anyone can access. This is also intended only for testing, and should be removed before moving into a production environment. Remove test database and access to it? [Y/n] <– 是否刪除test數據庫,直接回車 - Dropping test database… … Success! - Removing privileges on test database… … Success! Reloading the privilege tables will ensure that all changes made so far will take effect immediately. Reload privilege tables now? [Y/n] <– 是否重新加載權限表，直接回車 … Success! Cleaning up… All done! If you've completed all of the above steps, your MySQL installation should now be secure. Thanks for using MySQL! [root@server1 ~]#
第八步：
可選步驟，原來Linux下的MySQL默認是區分表名大小寫的，通過如下設置，可以讓MySQL不區分表名大小寫：
1、用root登錄，修改 /etc/my.cnf；
2、在[mysqld]節點下，加入一行： lower_case_table_names=1
3、重啟MySQL即可； service mysqld restart
以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持億速云。
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