Centos7下yum安装jdk、mysql、iptables、nginx、redis

# jdk
yum search java | grep -i --color JDK 
yum install java-1.8.0-openjdk  java-1.8.0-openjdk-devel 
cd /usr/lib/jvm/
cd java-1.8.0-openjdk-1.8.0.161-0.b14.el7_4.x86_64/
# 配置环境变量
vim /etc/profile
# 在文件最后面添加如下三行内容（具体路径根据自己的实际情况确定）
export JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.161-0.b14.el7_4.x86_64
export CLASSPATH=.:$JAVA_HOME/jre/lib/rt.jar:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export PATH=$PATH:$JAVA_HOME/bin
# 使配置文件即时生效
source /etc/profile
# 检查jdk是否安装按成
java -version

# mysql
rpm -Uvh http://dev.mysql.com/get/mysql-community-release-el7-5.noarch.rpm
yum repolist enabled | grep "mysql.*"
yum -y install mysql-community-server# 常用操作命令
systemctl enable mysqld
systemctl start mysqld
systemctl status mysqld.service

# iptables
# 停止firewalld
systemctl stop firewalld
# 屏蔽firewalld
systemctl mask firewalld
yum install iptables-services
# 启用iptables
systemctl enable iptables
systemctl start iptables
service iptables save
# 配置iptables规则
vim /etc/sysconfig/iptables
    -A INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT
    -A INPUT -m state --state NEW -m tcp -p tcp --dport 443 -j ACCEPT
# 重启iptables
systemctl restart iptables

# nginx
rpm -ivh http://nginx.org/packages/centos/7/noarch/RPMS/nginx-release-centos-7-0.el7.ngx.noarch.rpm
yum info nginx
yum install nginx

# redis
yum install epel-release && yum install redis
cp /etc/redis.conf /etc/redis.conf.back# 配置redis密码（强烈建议）
vim  /etc/redis.conf# 在配置文件中找到requirepass，将前面的#号注释放开，后面填上自己的redis密码，保存文件，重启redis即可
requirepass password
service redis start