1.安装OpenJDK
这里安装的OpenJDK，是开源版本的JDK，我们平时自己电脑上安装的是 Sun JDK(也叫Oracle JDK），OpenJDK可以看作Sun JDK的精简版。 如果想安装SunJDK，请参照下方的tomcat安装方法，步骤是一样的，注意liunx有些自带OpenJDK，需卸载。
注意，安装OpenJDK简单迅速，只需一条命令，且无需配置环境变量
①查看是否已经安装了JDK
1java -version 2rpm -qa |grep java 3rpm -qa |grep jdk
②若有如何卸载
卸载JDK相关文件输入：
yum -y remove java-1.8.0-openjdk*
卸载tzdata-java输入：
yum -y remove tzdata-java.noarch
③安装
1yum list java* #查看版本 2 3yum list java-1.8* #查看1.8版本 4 5yum install java-1.8.0-openjdk* -y # 安装
执行:
1[root@localhost ~]# yum -y install java-1.8.0-openjdk* 2Loaded plugins: fastestmirror 3Setting up Install Process 4Loading mirror speeds from cached hostfile 5* base: repos-lax.psychz.net 6* elrepo-kernel: repos.lax-noc.com 7* extras: repos-lax.psychz.net 8* updates: mirrors.oit.uci.edu 9Resolving Dependencies 10--> Running transaction check 11---> Package java-1.8.0-openjdk.i686 1:1.8.0.191.b12-0.el6_10 will be installed 12... 13 14Complete!
④检查安装结果
1[root@localhost ~]# java -version 2openjdk version "1.8.0_191" 3OpenJDK Runtime Environment (build 1.8.0_191-b12) 4OpenJDK Server VM (build 25.191-b12, mixed mode)
执行java和javac,正常,无需配置环境变量
3.安装tomcat
①去官网下载安装包
1https://tomcat.apache.org/download-90.cgi 2这里我下的是9.0的版本
②上传至服务器然后解压
这里我用的FileZilla 上传到ftp账户里
1[root@localhost ftpuser]# ls 2222 apache-tomcat-9.0.13.tar.gz dir1-0 dir1-1
然后复制此文件到/usr/local/tomcat/目录下
tomcat目录为自己创建，安装对路径并无要求
1[root@localhost ftpuser]# cp apache-tomcat-9.0.13.tar.gz /usr/local/tomcat/ 2[root@localhost ftpuser]# cd /usr/local/tomcat 3[root@localhost tomcat]# ls 4apache-tomcat-9.0.13.tar.gz
进入文件所在目录解压即可
[root@localhost tomcat]# tar zxvf apache-tomcat-9.0.13.tar.gz
③启动tomcat
1[root@localhost tomcat]# cd apache-tomcat-9.0.13/bin 2[root@localhost bin]# ./startup.sh 3Using CATALINA_BASE: /usr/local/tomcat/apache-tomcat-9.0.13 4Using CATALINA_HOME: /usr/local/tomcat/apache-tomcat-9.0.13 5Using CATALINA_TMPDIR: /usr/local/tomcat/apache-tomcat-9.0.13/temp 6Using JRE_HOME: /usr 7Using CLASSPATH: /usr/local/tomcat/apache-tomcat-9.0.13/bin/bootstrap.jar:/usr/local/tomcat/apache-tomcat-9.0.13/bin/tomcat-juli.jar 8Tomcat started.
关闭防火墙或者开放端口后，即可用任意一台设备访问tomcat
1开启端口 2[root@localhost ~]# /sbin/iptables -I INPUT -p tcp –dport 8080 -j ACCEPT #开启8080端口 3[root@localhost ~]# /etc/rc.d/init.d/iptables save #保存配置 4[root@localhost ~]# /etc/rc.d/init.d/iptables restart #重启防火墙 5关闭防火墙 6service iptables stop #暂时关闭 7chkconfig iptables off #设置成开启不自启
如我在自己电脑的浏览器输入 服务器ip:8080
④查看tomcat版本
1[root@localhost bin]# ./catalina.sh version 2Using CATALINA_BASE: /usr/local/tomcat/apache-tomcat-9.0.13 3Using CATALINA_HOME: /usr/local/tomcat/apache-tomcat-9.0.13 4Using CATALINA_TMPDIR: /usr/local/tomcat/apache-tomcat-9.0.13/temp 5Using JRE_HOME: /usr 6Using CLASSPATH: /usr/local/tomcat/apache-tomcat-9.0.13/bin/bootstrap.jar:/usr/local/tomcat/apache-tomcat-9.0.13/bin/tomcat-juli.jar 7Server version: Apache Tomcat/9.0.13 8Server built: Nov 2 2018 14:27:55 UTC 9Server number: 9.0.13.0 10OS Name: Linux 11OS Version: 4.10.4-1.el6.elrepo.i686 12Architecture: i386 13JVM Version: 1.8.0_191-b12 14JVM Vendor: Oracle Corporation 15[root@localhost bin]#
⑤关闭tomcat
查看tomcat是否运行
1ps -ef | grep tomcat 2[root@localhost bin]# ps -ef | grep tomcat 3root 6975 6663 0 11:43 pts/1 00:00:00 grep tomcat
关闭tomcat（执行shutdown.sh脚本）
1[root@localhost apache-tomcat-9.0.13]# cd bin 2[root@localhost bin]# ./shutdown.sh 3Using CATALINA_BASE: /usr/local/tomcat/apache-tomcat-9.0.13 4Using CATALINA_HOME: /usr/local/tomcat/apache-tomcat-9.0.13 5Using CATALINA_TMPDIR: /usr/local/tomcat/apache-tomcat-9.0.13/temp 6Using JRE_HOME: /usr 7Using CLASSPATH: /usr/local/tomcat/apache-tomcat-9.0.13/bin/bootstrap.jar:/usr/local/tomcat/apache-tomcat-9.0.13/bin/tomcat-juli.jar
⑥卸载tomcat
直接删除安装目录
rm -rf /usr/local/tomcat/apache-tomcat-9.0.13