Record the installation of JDK8 on Linux
1: cd /usr/local
mkdir java
2: cd java
wget https://download.oracle.com/otn/java/jdk/8u281-b09/89d678f2be164786b292527658ca1605/jdk-8u281-linux-x64.tar.gz?AuthParam= 1616666103_3d8263b5aa63cf3ed8720f0da2943b8e
(This path requires you to register your own Oracle account, you can get it)
3: tar -zxvf just downloaded file
4: vim etc/profile
export JAVA_HOME=/usr/local/java/jdk1.8.0_281
export JRE_HOME= J A V A H O M E / j r e e x p o r t C L A S S P A T H = . : JAVA_HOME/jre export CLASSPATH=.: JAVAHOME/jreexportCLASSPATH=.:JAVA_HOME/rt.jar: J A V A H O M E / t o o l s . j a r : JAVA_HOME/tools.jar: JAVAHOME/tools.jar:JAVA_HOME/dt.jar
export PATH= P A T H : PATH: PATH:JAVA_HOME/bin:$JRE_HOME/bin
5：source /etc/profile