系統環境

[root@tomcat1 /]# cat /etc/redhat-release
Red Hat Enterprise Linux Server release 7.6 (Maipo)

tomcat版本：

查詢命令

[root@tomcat1 /]# /usr/local/tomcat/bin/catalina.sh version
Using CATALINA_BASE:   /usr/local/tomcat
Using CATALINA_HOME:   /usr/local/tomcat
Using CATALINA_TMPDIR: /usr/local/tomcat/temp
Using JRE_HOME:        
 
/usr
Using CLASSPATH:       /usr/local/tomcat/bin/bootstrap.jar:/usr/local/tomcat/bin/tomcat-juli.jar
Using CATALINA_OPTS:
Server version: Apache Tomcat/8.5.61
Server built:   Dec 3 2020 14:03:28 UTC
Server number:  8.5.61.0
OS Name:        Linux
OS Version:     3.10.0-957.el7.x86_64
Architecture:   amd64
JVM Version:    
 
1.8.0_181-b13
JVM Vendor:     Oracle Corporation

或者

[root@tomcat1 /]# /usr/local/tomcat/bin/version.sh

java版本：

[root@tomcat1 /]# java -version
openjdk version "1.8.0_181"
OpenJDK Runtime Environment (build 1.8.0_181-b13)
OpenJDK 64-Bit Server VM (build 25.181-b13, mixed mode)

java安裝路徑檢視：

[root@tomcat1 /]# java -verbose
。
。
。
See http:
 
//www.oracle.com/technetwork/java/javase/documentation/index.html for more details.
[Loaded java.lang.Shutdown from /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.181-7.b13.el7.x86_64/jre/lib/rt.jar]
[Loaded java.lang.Shutdown$Lock from /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.181-7.b13.el7.x86_64/jre/lib/rt.jar]

本次採用預設安裝，不自定義安裝路徑，不自定義java版本的路徑，java環境採用yum安裝

tomcat需要執行在java環境

java有兩種 jre 和 jdk

jre(a Java Standard Edition RuntimeEnvironment)

jdk(a full Java Development Kit)

根據官方需求文件說明，tomcat 8.5 至少需要jre 7 的版本

部署步驟

準備java環境，此處選擇jdk，功能較jre更為強大

yum -y install java-1.8.0-openjdk*

https://tomcat.apache.org/