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This paper gives an example of how to install jdk1.8.0_151 and mysql5.6.38 in centos7.2.1511. Share with you for your reference, the details are as follows:

One: environment

Second: download the rpm package of jdk locally and upload it to the server (because I just started to use wget to download directly to the server, and the installation keeps reporting errors, so I decided to use this stupid method)

Download address: http://download.oracle.com/otn-pub/java/jdk/8u151-b12/e758a0de34e24606bca991d704f6dcbf/jdk-8u151-linux-x64.rpm

JDK is installed in / usr/java by default

Three: configure environment variables

My machine can perform java-version operations normally without configuring environment variables after installing jdk-8u151-linux-x64.rpm, so I did not configure JDK environment variables. However, for future discomfort, here is a record of how to configure it, as follows:

Modify the system environment variable file

Vi / etc/profile

Append the following to the file:

JAVA_HOME=/usr/java/jdk1.8.0_151

JRE_HOME=/usr/java/jdk1.8.0_151/jre

PATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/bin

CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/libexport JAVA_HOME JRE_HOME PATH CLASSPATH

Make the changes effective

[root@localhost ~] # source / etc/profile / / make the modification take effect immediately [root@localhost ~] # echo $PATH / / View path value

View the status of the system environment

[root@localhost ~] # echo $PATH/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin:/usr/java/jdk1.8.0_25/bin:/usr/java/jdk1.8.0_25/jre/bin

4: install mysql (download and install mysql-server on the official website)

# wget http://dev.mysql.com/get/mysql-community-release-el7-5.noarch.rpm# rpm-ivh mysql-community-release-el7-5.noarch.rpm# yum install mysql-community-server

Restart the mysql service after successful installation.

# service mysqld restart

The initial installation of the mysql,root account does not have a password.

Set password

Mysql > set password for 'root'@'localhost' = password (' password'); Query OK, 0 rows affected (0.00 sec) mysql >

Five: configure mysql

1. Coding

The mysql configuration file is / etc/my.cnf

Finally, add the coding configuration.

[mysql] default-character-set = utf8

The character encoding here must be the same as in / usr/share/mysql/charsets/Index.xml.

2. Remote connection settings

Assign all permissions on all tables in all databases to root users at all IP addresses.

Mysql > grant all privileges on *. * to root@'%'identified by 'password'

If it is a new user instead of root, create a new user first

Mysql > create user 'username'@'%' identified by' password'

At this point, you can connect remotely.

I hope what is described in this article will be helpful to the maintenance of CentOS server.

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