1. Confirm whether mysql has been installed. You can find out from the following code
[root@cdh1 zjl]# yum list installed mysql*Loaded plugins: fastestmirror, refresh-packagekit, security Loading mirror speeds from cached hostfile * base: mirrors.zju.edu.cn * extras: mirrors.aliyun.com * updates: mirrors.aliyun.com Installed Packages MySQL-python.x86_64 1.2.3-0.3.c1.1.el6 @base mysql-libs.x86_64 5.1.73-8.el6_8 @anaconda-CentOS-201703281317.x86_64/6.9
2. To uninstall the installed mysql, it is recommended to use the yum command, because the yum command can automatically delete the connection with mysql. Related dependencies; if you use the rpm command, you need to manually delete the files related to mysql, which is more troublesome
[root@cdh1 zjl]# yum remove MySQL-python.x86_64 mysql-libs.x86_64 Loaded plugins: fastestmirror, refresh-packagekit, security Setting up Remove Process Resolving Dependencies--> Running transaction check---> Package MySQL-python.x86_64 0:1.2.3-0.3.c1.1.el6 will be erased--> Processing Dependency: MySQL-python for package: cloudera-manager-agent-5.11.1-1.cm5111.p0.9.el6.x86_64---> Package mysql-libs.x86_64 0:5.1.73-8.el6_8 will be erased--> Processing Dependency: libmysqlclient.so.16()(64bit) for package: 2:postfix-2.6.6-8.el6.x86_64--> Processing Dependency: libmysqlclient.so.16(libmysqlclient_16)(64bit) for package: 2:postfix-2.6.6-8.el6.x86_64--> Processing Dependency: mysql-libs for package: 2:postfix-2.6.6-8.el6.x86_64--> Running transaction check---> Package cloudera-manager-agent.x86_64 0:5.11.1-1.cm5111.p0.9.el6 will be erased---> Package postfix.x86_64 2:2.6.6-8.el6 will be erased--> Processing Dependency: /usr/sbin/sendmail for package: redhat-lsb-core-4.0-7.el6.centos.x86_64--> Processing Dependency: /usr/sbin/sendmail for package: cronie-1.4.4-16.el6_8.2.x86_64--> Running transaction check---> Package cronie.x86_64 0:1.4.4-16.el6_8.2 will be erased--> Processing Dependency: cronie = 1.4.4-16.el6_8.2 for package: cronie-anacron-1.4.4-16.el6_8.2.x86_64---> Package redhat-lsb-core.x86_64 0:4.0-7.el6.centos will be erased--> Processing Dependency: redhat-lsb-core(x86-64) = 4.0 for package: redhat-lsb-printing-4.0-7.el6.centos.x86_64--> Processing Dependency: redhat-lsb-core(x86-64) = 4.0-7.el6.centos for package: redhat-lsb-4.0-7.el6.centos.x86_64--> Processing Dependency: redhat-lsb-core(x86-64) = 4.0 for package: redhat-lsb-graphics-4.0-7.el6.centos.x86_64--> Running transaction check---> Package cronie-anacron.x86_64 0:1.4.4-16.el6_8.2 will be erased---> Package redhat-lsb.x86_64 0:4.0-7.el6.centos will be erased--> Processing Dependency: redhat-lsb(x86-64) = 4.0-7.el6.centos for package: redhat-lsb-compat-4.0-7.el6.centos.x86_64---> Package redhat-lsb-graphics.x86_64 0:4.0-7.el6.centos will be erased---> Package redhat-lsb-printing.x86_64 0:4.0-7.el6.centos will be erased--> Running transaction check---> Package redhat-lsb-compat.x86_64 0:4.0-7.el6.centos will be erased--> Processing Dependency: /etc/cron.d for package: crontabs-1.10-33.el6.noarch--> Processing Dependency: /etc/cron.d for package: sysstat-9.0.4-33.el6.x86_64--> Restarting Dependency Resolution with new changes.--> Running transaction check---> Package crontabs.noarch 0:1.10-33.el6 will be erased---> Package sysstat.x86_64 0:9.0.4-33.el6 will be erased--> Finished Dependency Resolution Dependencies Resolved==================================================================== Package Arch Version Repository Size====================================================================Removing: MySQL-python x86_64 1.2.3-0.3.c1.1.el6 @base 246 k mysql-libs x86_64 5.1.73-8.el6_8 @anaconda-CentOS-201703281317.x86_64/6.9 4.0 M Removing for dependencies: cloudera-manager-agent x86_64 5.11.1-1.cm5111.p0.9.el6 @/cloudera-manager-agent-5.11.1-1.cm5111.p0.9.el6.x86_64 71 M cronie x86_64 1.4.4-16.el6_8.2 @anaconda-CentOS-201703281317.x86_64/6.9 174 k cronie-anacron x86_64 1.4.4-16.el6_8.2 @anaconda-CentOS-201703281317.x86_64/6.9 43 k crontabs noarch 1.10-33.el6 @anaconda-CentOS-201703281317.x86_64/6.9 2.4 k postfix x86_64 2:2.6.6-8.el6 @anaconda-CentOS-201703281317.x86_64/6.9 9.7 M redhat-lsb x86_64 4.0-7.el6.centos @anaconda-CentOS-201703281317.x86_64/6.9 0.0 redhat-lsb-compat x86_64 4.0-7.el6.centos @anaconda-CentOS-201703281317.x86_64/6.9 0.0 redhat-lsb-core x86_64 4.0-7.el6.centos @anaconda-CentOS-201703281317.x86_64/6.9 22 k redhat-lsb-graphics x86_64 4.0-7.el6.centos @anaconda-CentOS-201703281317.x86_64/6.9 0.0 redhat-lsb-printing x86_64 4.0-7.el6.centos @anaconda-CentOS-201703281317.x86_64/6.9 0.0 sysstat x86_64 9.0.4-33.el6 @anaconda-CentOS-201703281317.x86_64/6.9 826 k Transaction Summary====================================================================Remove 13 Package(s) Installed size: 86 M Is this ok [y/N]: y Downloading Packages: Running rpm_check_debug Running Transaction Test Transaction Test Succeeded Running Transaction Warning: RPMDB altered outside of yum. Erasing : redhat-lsb-compat-4.0-7.el6.centos.x86_64 1/13 Erasing : redhat-lsb-4.0-7.el6.centos.x86_64 2/13 Erasing : cloudera-manager-agent-5.11.1-1.cm5111.p0.9. 3/13 warning: /etc/cloudera-scm-agent/config.ini saved as /etc/cloudera-scm-agent/config.ini.rpmsave Erasing : redhat-lsb-graphics-4.0-7.el6.centos.x86_64 4/13 Erasing : redhat-lsb-printing-4.0-7.el6.centos.x86_64 5/13 Erasing : redhat-lsb-core-4.0-7.el6.centos.x86_64 6/13 /var/tmp/rpm-tmp.jLbJUk: line 1: lsb_release: command not found Erasing : MySQL-python-1.2.3-0.3.c1.1.el6.x86_64 7/13 Erasing : sysstat-9.0.4-33.el6.x86_64 8/13 Erasing : crontabs-1.10-33.el6.noarch 9/13 Erasing : cronie-anacron-1.4.4-16.el6_8.2.x86_64 10/13 Erasing : cronie-1.4.4-16.el6_8.2.x86_64 11/13 Erasing : 2:postfix-2.6.6-8.el6.x86_64 12/13 Erasing : mysql-libs-5.1.73-8.el6_8.x86_64 13/13 Verifying : redhat-lsb-printing-4.0-7.el6.centos.x86_64 1/13 Verifying : cronie-anacron-1.4.4-16.el6_8.2.x86_64 2/13 Verifying : cronie-1.4.4-16.el6_8.2.x86_64 3/13 Verifying : 2:postfix-2.6.6-8.el6.x86_64 4/13 Verifying : redhat-lsb-4.0-7.el6.centos.x86_64 5/13 Verifying : redhat-lsb-core-4.0-7.el6.centos.x86_64 6/13 Verifying : cloudera-manager-agent-5.11.1-1.cm5111.p0.9. 7/13 Verifying : crontabs-1.10-33.el6.noarch 8/13 Verifying : redhat-lsb-compat-4.0-7.el6.centos.x86_64 9/13 Verifying : MySQL-python-1.2.3-0.3.c1.1.el6.x86_64 10/13 Verifying : redhat-lsb-graphics-4.0-7.el6.centos.x86_64 11/13 Verifying : sysstat-9.0.4-33.el6.x86_64 12/13 Verifying : mysql-libs-5.1.73-8.el6_8.x86_64 13/13 Removed: MySQL-python.x86_64 0:1.2.3-0.3.c1.1.el6 mysql-libs.x86_64 0:5.1.73-8.el6_8 Dependency Removed: cloudera-manager-agent.x86_64 0:5.11.1-1.cm5111.p0.9.el6 cronie.x86_64 0:1.4.4-16.el6_8.2 cronie-anacron.x86_64 0:1.4.4-16.el6_8.2 crontabs.noarch 0:1.10-33.el6 postfix.x86_64 2:2.6.6-8.el6 redhat-lsb.x86_64 0:4.0-7.el6.centos redhat-lsb-compat.x86_64 0:4.0-7.el6.centos redhat-lsb-core.x86_64 0:4.0-7.el6.centos redhat-lsb-graphics.x86_64 0:4.0-7.el6.centos redhat-lsb-printing.x86_64 0:4.0-7.el6.centos sysstat.x86_64 0:9.0.4-33.el6 Complete!
3. Use the whereis command to find the files related to mysql, because step 2 Use yum to uninstall, so mysql is cleaned very clean; if you use rpm, it will be very troublesome. There are many files that need to be cleared manually
[root@cdh1 zjl]# whereis mysql mysql:
4. Check the mysql installation package in the system
[root@cdh1 zjl]# yum list mysql*Loaded plugins: fastestmirror, refresh-packagekit, security Loading mirror speeds from cached hostfile * base: mirrors.zju.edu.cn * extras: mirrors.aliyun.com * updates: mirrors.aliyun.com Available Packages MySQL-python.x86_64 1.2.3-0.3.c1.1.el6 base mysql.x86_64 5.1.73-8.el6_8 base mysql-bench.x86_64 5.1.73-8.el6_8 base mysql-connector-java.noarch 1:5.1.17-6.el6 base mysql-connector-odbc.x86_64 5.1.5r1144-7.el6 base mysql-devel.i686 5.1.73-8.el6_8 base mysql-devel.x86_64 5.1.73-8.el6_8 base mysql-embedded.i686 5.1.73-8.el6_8 base mysql-embedded.x86_64 5.1.73-8.el6_8 base mysql-embedded-devel.i686 5.1.73-8.el6_8 base mysql-embedded-devel.x86_64 5.1.73-8.el6_8 base mysql-libs.i686 5.1.73-8.el6_8 base mysql-libs.x86_64 5.1.73-8.el6_8 base mysql-server.x86_64 5.1.73-8.el6_8 base mysql-test.x86_64 5.1.73-8.el6_8 base
5. Select mysql-server to install
[root@cdh1 zjl]# mysql--***-->---> Package mysql-server.x86_64 :.---> Processing Dependency: mysql = .-.el6_8 package: mysql-server-.---> Processing Dependency: -DBI package: mysql-server-.---> Processing Dependency: -DBD-MySQL package: mysql-server-.---> Processing Dependency: (DBI) package: mysql-server-.---> Processing Dependency: libmysqlclient_r.so.(libmysqlclient_16)(64bit) package: mysql-server-.---> Processing Dependency: libmysqlclient.so.(libmysqlclient_16)(64bit) package: mysql-server-.---> Processing Dependency: libmysqlclient_r.so.()(64bit) package: mysql-server-.---> Processing Dependency: libmysqlclient.so.()(64bit) package: mysql-server-.--->---> Package mysql.x86_64 :.----> Package mysql-libs.x86_64 :.----> Package -DBD-MySQL.x86_64 :----> Package -DBI.x86_64 :--->==================================================================================================================================================================================================================================================================================================================================================================================================================================-server x86_64 .-.el6_8 base .-.el6_8 base -libs x86_64 .-.el6_8 base -DBD-MySQL x86_64 -.el6 base -DBI x86_64 -.el6 base =================================================================================================================================================================================================================/
6. Select y to continue the installation
Is this ok [y/N]: y Downloading Packages: (1/5): mysql-5.1.73-8.el6_8.x86_64.rpm | 895 kB 00:00 (2/5): mysql-libs-5.1.73-8.el6_8.x86_64.rpm | 1.2 MB 00:00 (3/5): mysql-server-5.1.73-8.el6_8.x86_64.rpm | 8.6 MB 00:02 (4/5): perl-DBD-MySQL-4.013-3.el6.x86_64.rpm | 134 kB 00:00 (5/5): perl-DBI-1.609-4.el6.x86_64.rpm | 705 kB 00:00 -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Total 2.2 MB/s | 12 MB 00:05 Running rpm_check_debug Running Transaction Test Transaction Test Succeeded Running Transaction Installing : mysql-libs-5.1.73-8.el6_8.x86_64 1/5 Installing : perl-DBI-1.609-4.el6.x86_64 2/5 Installing : perl-DBD-MySQL-4.013-3.el6.x86_64 3/5 Installing : mysql-5.1.73-8.el6_8.x86_64 4/5 Installing : mysql-server-5.1.73-8.el6_8.x86_64 5/5 Verifying : perl-DBD-MySQL-4.013-3.el6.x86_64 1/5 Verifying : mysql-libs-5.1.73-8.el6_8.x86_64 2/5 Verifying : mysql-server-5.1.73-8.el6_8.x86_64 3/5 Verifying : mysql-5.1.73-8.el6_8.x86_64 4/5 Verifying : perl-DBI-1.609-4.el6.x86_64 5/5 Installed: mysql-server.x86_64 0:5.1.73-8.el6_8 Dependency Installed: mysql.x86_64 0:5.1.73-8.el6_8 mysql-libs.x86_64 0:5.1.73-8.el6_8 perl-DBD-MySQL.x86_64 0:4.013-3.el6 perl-DBI.x86_64 0:1.609-4.el6 Complete!
7. Start the mysql service
[root@cdh1 zjl]# service mysqld start Initializing MySQL database: Installing MySQL system tables... OK Filling help tables... OK To start mysqld at boot time you have to copy support-files/mysql.server to the right place for your system PLEASE REMEMBER TO SET A PASSWORD FOR THE MySQL root USER !To do so, start the server, then issue the following commands:/usr/bin/mysqladmin -u root password 'new-password'/usr/bin/mysqladmin -u root -h cdh1.zjl.com password 'new-password'Alternatively you can run:/usr/bin/mysql_secure_installationwhich will also give you the option of removing the test databases and anonymous user created by default. This is strongly recommended for production servers. See the manual for more instructions. You can start the MySQL daemon with: cd /usr ; /usr/bin/mysqld_safe &You can test the MySQL daemon with mysql-test-run.pl cd /usr/mysql-test ; perl mysql-test-run.pl Please report any problems with the /usr/bin/mysqlbug script! [ OK ] Starting mysqld: [ OK ]
8. Try connecting to mysql directly and then\q close the connection
[root@cdh1 zjl]# mysql Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 2Server version: 5.1.73 Source distribution Copyright (c) 2000, 2013, 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> \q Bye
9. Set up mysql to start up
[root@cdh1 zjl]# chkconfig mysqld on
10. Open port 3306 and save
[root@cdh1 zjl]# /sbin/iptables -I INPUT -p tcp --dport 3306 -j ACCEPT [root@cdh1 zjl]# /etc/rc.d/init.d/iptables save
11. Connect to mysql and set the password
[root@cdh1 zjl]# mysql
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 3Server version: 5.1.73 Source distribution
Copyright (c) 2000, 2013, 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> use mysql;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
mysql> update user set password=password('123') where user='root';
Query OK, 3 rows affected (0.02 sec)
Rows matched: 3 Changed: 3 Warnings: 0mysql> flush privileges;
Query OK, 0 rows affected (0.02 sec)
mysql> \q
Bye12. Restart the mysql service
[root@cdh1 zjl]# service mysqld restart Stopping mysqld: [ OK ] Starting mysqld: [ OK ]
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