1.安裝OpenJDK

注意，安裝OpenJDK簡單迅速，只需一條命令，且無需配置環境變數

①檢視是否已經安裝了JDK

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

②若有如何解除安裝

解除安裝JDK相關檔案輸入：

yum -y remove java-1.8.0-openjdk*

解除安裝tzdata-java輸入：

yum -y remove tzdata-java.noarch

③安裝

yum list java* #檢視版本

yum list java-1.8* #檢視1.8版本

yum install java-1.8.0-openjdk* -y # 安裝
 

執行:

[[email protected] ~]# 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檢查安裝結果

[[email protected] ~]# 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)

執行java和javac,正常,無需配置環境變數

3.安裝tomcat

①去官網下載安裝包

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

②上傳至伺服器然後解壓

這裡我用的FileZilla 上傳到ftp賬戶裡

[[email protected] ftpuser]# ls
222  apache-tomcat-9.0.13.tar.gz  dir1-0  dir1-1

然後複製此檔案到/usr/local/tomcat/目錄下

tomcat目錄為自己建立，安裝對路徑並無要求

[[email protected] ftpuser]# cp apache-tomcat-9.0.13.tar.gz /usr/local/tomcat/
[[email protected] ftpuser]# cd /usr/local/tomcat
[[email protected] tomcat]# ls
apache-tomcat-9.0.13.tar.gz

進入檔案所在目錄解壓即可

[[email protected] tomcat]# tar zxvf apache-tomcat-9.0.13.tar.gz

③啟動tomcat

[[email protected] tomcat]# cd apache-tomcat-9.0.13/bin
[[email protected] 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.

關閉防火牆或者開放埠後，即可用任意一臺裝置訪問tomcat

開啟埠
[[email protected] ~]# /sbin/iptables -I INPUT -p tcp –dport 8080 -j ACCEPT #開啟8080埠 
[[email protected] ~]# /etc/rc.d/init.d/iptables save #儲存配置 
[[email protected] ~]# /etc/rc.d/init.d/iptables restart #重啟防火牆
關閉防火牆
service iptables stop #暫時關閉
chkconfig iptables off #設定成開啟不自啟

如我在自己電腦的瀏覽器輸入 伺服器ip:8080

④檢視tomcat版本

[[email protected] 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
[[email protected] bin]# 

⑤關閉tomcat

檢視tomcat是否執行

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

關閉tomcat（執行shutdown.sh指令碼）

[[email protected] apache-tomcat-9.0.13]# cd bin
[[email protected] 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解除安裝tomcat

直接刪除安裝目錄

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