JDK

Install tomcat

Load the OpenJDK and related java files that come with the system

② type in the command window:

Rpm-qa | grep java

The following can be deleted

Java-1.7.0-openjdk-1.7.0.111-2.6.7.8.el7.x86_64

Java-1.8.0-openjdk-1.8.0.102-4.b14.el7.x86_64

Java-1.8.0-openjdk-headless-1.8.0.102-4.b14.el7.x86_64

Java-1.7.0-openjdk-headless-1.7.0.111-2.6.7.8.el7.x86_64

Noarch files do not need to be deleted

Python-javapackages-3.4.1-11.el7.noarch

Tzdata-java-2016g-2.el7.noarch

Javapackages-tools-3.4.1-11.el7.noarch

③ type in the command window:

Rpm-e-- nodeps java-1.7.0-openjdk-1.7.0.111-2.6.7.8.el7.x86_64

However, there will be errors, because under the normal user sxd, you do not have permission to manipulate these files.

Resolve:

In the command window, type:

Su root

Download good jdk under widonws system

Wget http://download.oracle.com/otn-pub/java/jdk/8u171-b11-demos/512cd62ec5174c3487ac17c61aaa89e8/jdk-8u171-linux-x64-demos.tar.gz

Install the file transfer command rz

Yum install lrzsz-y

Extract the file

Tar-zxf jdk-8u171-linux-x64-demos.tar.gz

Rename the file and move to / usr/local/

Mv jdk1.8.0_171 jdk

Mv jdk / usr/local/

Configure java environment variables

Vim / etc/profile

Add the following code

The location where JAVA_HOME=/usr/local/jdk stores the jdk

Location where export JRE_HOME=/usr/local/jdk/jre jre is stored

Export CLASSPATH=$JAVA_HOME/lib:$JRE_HOME/lib:$CLASSPATH

Export PATH=$JAVA_HOME/bin:$JRE_HOME/bin:$PATH

Start downloading tomcat

Wget http://mirrors.shu.edu.cn/apache/tomcat/tomcat-8/v8.5.32/bin/apache-tomcat-8.5.32.tar.gz

Extract the file

Tar-xf apache-tomcat-8.5.32.tar.gz

Rename the extracted file and move the file to / usr/local

Mv apache-tomcat-8.5.32 tomcat8

Mv mv tomcat8 / usr/local/

Startup file

/ usr/local/tomcat8/bin

. / startup.sh start

. / shutdown.sh off

Cat

Log file view

/ usr/local/tomcat8/logs

Cat calina.out log file