jdk 环境变量格式

rpm -e 强行卸载其他版本jdk

       -qa 查询

##JAVA_HOME
export JAVA_HOME=/opt/modules/jdk1.7.0_79
export PATH=$PATH:$JAVA_HOME/bin

##MAVEN_HOME
export MAVEN_HOME=/opt/modules/apache-maven-3.5.4
export PATH=$PATH:$MAVEN_HOME/bin
"/etc/profile" 85L, 1981C written
[root@192 kurds]# source /etc/profile
[root@192 kurds]# reboot

 yum install gtk2 gtk2-devel gtk2-devel-docs