1. Download jdk from the official website
The following is the jdk download address, just click it
Just download the jdk you need, it is recommended to download jdk8
2. Transfer jdk to linux server
2.1 First create a folder in linux and enter
mkdir /opt
cd /opt
2.2 Use xftp to upload jdk to linux
2.3 Decompress jdk
tar -zxvf your jdk name
3. Configure environment variables
vi /etc/profile
After inputting and pressing Enter, add the following information at the end of the file:
Note: JAVA_HOME=/usr/local/jdk/jdk1.8.0_181 in the first line is the actual decompression directory of your own jdk on the right side of the equal sign. If it is not the directory, you need to change it to your own actual directory, and the others remain unchanged.
export JAVA_HOME=/opt/jdk1.8.0_202 export CLASSPATH=$:CLASSPATH:$JAVA_HOME/lib/ export PATH=$PATH:$JAVA_HOME/bin
or as follows
export JAVA_HOME=/opt/jdk1.8.0_202
export PATH=$JAVA_HOME/bin:$PATH
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
After editing, save and exit, then enter the following command to refresh the environment configuration to take effect:
source /etc/profile
4. Whether the test is successful
java -version
The version description appears successfully