jdk1.8的安装

1.创建目录

cd /

mkdir java

cd java

2.创建java文件目录并通过wget下载jdk1.8

cd java

wget https://download.oracle.com/otn/java/jdk/8u261-b12/a4634525489241b9a9e1aa73d9e118e6/jdk-8u261-linux-i586.tar.gz?AuthParam=1603001583_056f20811c3fae62808599238a1cfde7

3.解压jdk并删除解压包

tar -zxvf jdk-8u261-linux-i586.tar.gz\?AuthParam\=1603001583_056f20811c3fae62808599238a1cfde7

rm -rf jdk-8u261-linux-i586.tar.gz\?AuthParam\=1603001583_056f20811c3fae62808599238a1cfde7 

ls

4.配置jdk环境变量

export JAVA_HOME=/java/jdk1.8.0_261

export CLASSPATH=.:$JAVA_HOME/jre/lib/rt.jar:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar

export PATH=$JAVA_HOME/bin:$PATH

ctrl+c  :wq

cd /

source /etc/profile

java -version

5.如果出现错误

jdk1.8 解压安装后出现错误：-bash: /usr/local/jdk1.8/jdk1.8.0_181/bin/java: /lib/ld-linux.so.2: bad ELF interpreter: No such file or directory

yum install glibc.i686

6.设置永久环境变量

vi ~/.zshrc

export JAVA_HOME=/java/jdk1.8.0_261

export CLASSPATH=.:$JAVA_HOME/jre/lib/rt.jar:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar

export PATH=$JAVA_HOME/bin:$PATH

ctrl+c  :wq

source ~/.zshrc

java -version