查看jdk版本号
#java -version安装JDK1.7:1.下载tag.gz文件2.复制到/usr/java目录下并解压#cp jdk-7u79-linux-x64.tar.gz /usr/java#tar -zxvf jdk-7u79-linux-x64.tar.gz3.配置全局环境变量在/etc/profile文件内追加以下内容# jdk7 settingsJAVA_HOME=/usr/java/jdk1.7.0_79JRE_HOME=$JAVA_HOME/jrePATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/binCLASSPATH=:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/libexport JAVA_HOME JRE_HOME PATH CLASSPATH然后执行 source /etc/profile 使配置生效。安装Tomcat8(下载链接:)#cd /home#mkdir -p www安装tomcat将apache-tomcat-8.0.21.tar.gz文件上传到/home/www中执行以下操作:#cd www[root@svr www]# lsapache-tomcat-8.0.21.tar.gz复制代码代码如下:[root@svr www]# tar -zxvf apache-tomcat-8.0.21.tar.gz[root@svr www]# rm -rf apache-tomcat-8.0.21.tar.gz [root@svr www]# mv apache-tomcat-8.0.21 tomcat启动Tomcat[root@svr ~]# /home/www/tomcat/bin/catalina.sh startUsing CATALINA_BASE: /home/www/tomcatUsing CATALINA_HOME: /home/www/tomcatUsing CATALINA_TMPDIR: /home/www/tomcat/tempUsing JRE_HOME: /usr/java/jdk1.7.0_79/jreUsing CLASSPATH: /home/www/tomcat/bin/bootstrap.jar:/home/www/tomcat/bin/tomcat-juli.jarTomcat started.如果出现下面错误:Neither the JAVA_HOME nor the JRE_HOME environment variable is definedAt least one of these environment variable is needed to run this program则要注意前提还要设置java路径在home/www/tomcat/bin/setclasspath.sh中添加一下内容export JAVAHOME=/usr/java/jdk1.7.0_79export JRE_HOME=/usr/java/jdk1.7.0_79/jre防火墙开放8080端口[root@svr ~]# vi /etc/sysconfig/iptables#增加以下代码-A INPUT -m state --state NEW -m tcp -p tcp --dport 8080 -j ACCEPT重启防火墙#service iptables restart检验Tomcat安装运行通过以下地址查看tomcat是否运行正常:看到tomcat系统界面,说明安装成功!停止Tomcat:[root@svr ~]# /home/www/tomcat/bin/catalina.sh stopUsing CATALINA_BASE: /home/www/tomcatUsing CATALINA_HOME: /home/www/tomcatUsing CATALINA_TMPDIR: /home/www/tomcat/tempUsing JRE_HOME: /usr/java/jdk1.7.0_79/jreUsing CLASSPATH: /home/www/tomcat/bin/bootstrap.jar:/home/www/tomcat/bin/tomcat-juli.jar查看Tomcat日志:[root@svr ~]# tail -f /home/www/tomcat/logs/catalina.out