# tar -zxvf jdk-8u261-linux-x64.tar.gz -C /usr/local/jdk # vi /etc/profile //Shift + G跳到行尾 export JAVA_HOME=/usr/local/jdk/jdk1.8.0_261 export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar export PATH=$PATH:$JAVA_HOME/bin # source /etc/profile # java -version
# jps
# scp jdk-8u261-linux-x64.tar.gz 192.168.239.137:/root/
# javac xx.java # strace -ff -o out java xx
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