1.安裝OpenJDK

這里安裝的OpenJDK，是開源版本的JDK，我們平時自己電腦上安裝的是 Sun JDK(也叫Oracle JDK），OpenJDK可以看作Sun JDK的精簡版。
如果想安裝SunJDK，請參照下方的tomcat安裝方法，步驟是一樣的，注意liunx有些自帶OpenJDK，需卸載。

注意，安裝OpenJDK簡單迅速，只需一條命令，且無需配置環(huán)境變量

①查看是否已經(jīng)安裝了JDK

java -version  rpm -qa |grep java   rpm -qa |grep jdk 

②若有如何卸載

卸載JDK相關(guān)文件輸入：

yum -y remove java-1.8.0-openjdk*

卸載tzdata-java輸入：

yum -y remove tzdata-java.noarch

③安裝

yum list java* #查看版本    yum list java-1.8* #查看1.8版本    yum install java-1.8.0-openjdk* -y # 安裝

執(zhí)行:

[root@localhost ~]# yum -y install java-1.8.0-openjdk*  Loaded plugins: fastestmirror  Setting up Install Process  Loading mirror speeds from cached hostfile  * base: repos-lax.psychz.net  * elrepo-kernel: repos.lax-noc.com  * extras: repos-lax.psychz.net  * updates: mirrors.oit.uci.edu  Resolving Dependencies  --> Running transaction check  ---> Package java-1.8.0-openjdk.i686 1:1.8.0.191.b12-0.el6_10 will be installed  ...    Complete!

④檢查安裝結(jié)果

[root@localhost ~]# java -version  openjdk version "1.8.0_191"  OpenJDK Runtime Environment (build 1.8.0_191-b12)  OpenJDK Server VM (build 25.191-b12, mixed mode)

執(zhí)行java和javac,正常,無需配置環(huán)境變量

3.安裝tomcat

①去官網(wǎng)下載安裝包

https://tomcat.apache.org/download-90.cgi  這里我下的是9.0的版本

②上傳至服務(wù)器然后解壓

這里我用的FileZilla 上傳到ftp賬戶里

[root@localhost ftpuser]# ls  222  apache-tomcat-9.0.13.tar.gz  dir1-0  dir1-1

然后復(fù)制此文件到/usr/local/tomcat/目錄下

tomcat目錄為自己創(chuàng)建，安裝對路徑并無要求

[root@localhost ftpuser]# cp apache-tomcat-9.0.13.tar.gz /usr/local/tomcat/  [root@localhost ftpuser]# cd /usr/local/tomcat  [root@localhost tomcat]# ls  apache-tomcat-9.0.13.tar.gz

進入文件所在目錄解壓即可

[root@localhost tomcat]# tar zxvf apache-tomcat-9.0.13.tar.gz

③啟動tomcat

[root@localhost tomcat]# cd apache-tomcat-9.0.13/bin  [root@localhost bin]# ./startup.sh  Using CATALINA_BASE:   /usr/local/tomcat/apache-tomcat-9.0.13  Using CATALINA_HOME:   /usr/local/tomcat/apache-tomcat-9.0.13  Using CATALINA_TMPDIR: /usr/local/tomcat/apache-tomcat-9.0.13/temp  Using JRE_HOME:        /usr  Using CLASSPATH:       /usr/local/tomcat/apache-tomcat-9.0.13/bin/bootstrap.jar:/usr/local/tomcat/apache-tomcat-9.0.13/bin/tomcat-juli.jar  Tomcat started.

關(guān)閉防火墻或者開放端口后，即可用任意一臺設(shè)備訪問tomcat

開啟端口  [root@localhost ~]# /sbin/iptables -I INPUT -p tcp –dport 8080 -j ACCEPT #開啟8080端口   [root@localhost ~]# /etc/rc.d/init.d/iptables save #保存配置   [root@localhost ~]# /etc/rc.d/init.d/iptables restart #重啟防火墻  關(guān)閉防火墻  service iptables stop #暫時關(guān)閉  chkconfig iptables off #設(shè)置成開啟不自啟

如我在自己電腦的瀏覽器輸入 服務(wù)器ip:8080

④查看tomcat版本

[root@localhost bin]# ./catalina.sh version  Using CATALINA_BASE:   /usr/local/tomcat/apache-tomcat-9.0.13  Using CATALINA_HOME:   /usr/local/tomcat/apache-tomcat-9.0.13  Using CATALINA_TMPDIR: /usr/local/tomcat/apache-tomcat-9.0.13/temp  Using JRE_HOME:        /usr  Using CLASSPATH:       /usr/local/tomcat/apache-tomcat-9.0.13/bin/bootstrap.jar:/usr/local/tomcat/apache-tomcat-9.0.13/bin/tomcat-juli.jar  Server version: Apache Tomcat/9.0.13  Server built:   Nov 2 2018 14:27:55 UTC  Server number:  9.0.13.0  OS Name:        Linux  OS Version:     4.10.4-1.el6.elrepo.i686  Architecture:   i386  JVM Version:    1.8.0_191-b12  JVM Vendor:     Oracle Corporation  [root@localhost bin]# 

⑤關(guān)閉tomcat

查看tomcat是否運行

ps -ef | grep tomcat  [root@localhost bin]# ps -ef | grep tomcat  root      6975  6663  0 11:43 pts/1    00:00:00 grep tomcat

關(guān)閉tomcat（執(zhí)行shutdown.sh腳本）

[root@localhost apache-tomcat-9.0.13]# cd bin  [root@localhost bin]# ./shutdown.sh  Using CATALINA_BASE:   /usr/local/tomcat/apache-tomcat-9.0.13  Using CATALINA_HOME:   /usr/local/tomcat/apache-tomcat-9.0.13  Using CATALINA_TMPDIR: /usr/local/tomcat/apache-tomcat-9.0.13/temp  Using JRE_HOME:        /usr  Using 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卸載tomcat

直接刪除安裝目錄

rm -rf /usr/local/tomcat/apache-tomcat-9.0.13