安裝JDK
安裝之前先檢查一下系統(tǒng)有沒(méi)有自帶open-jdk
[root@39 ~]# rpm -qa |grep java
[root@39 ~]# rpm -qa |grep jdk
[root@39 ~]# rpm -qa |grep gcj
如果沒(méi)有輸入信息表示沒(méi)有安裝
如果有安裝可以使用如下命令批量卸載所有帶有Java的文件
[root@39 ~]# rpm -qa | grep java | xargs rpm -e --nodeps
rpm: no packages given for erase
首先檢索包含java的列表
[root@39 ~]yum list java*
檢索1.8的列表
[root@39 ~]yum list java-1.8*
安裝1.8.0的所有文件
[root@39 ~]yum install java-1.8.0-openjdk* -y
使用命令檢查是否安裝成功
[root@39 ~]# java -version
openjdk version "1.8.0_191"
OpenJDK Runtime Environment (build 1.8.0_191-b12)
OpenJDK 64-Bit Server VM (build 25.191-b12, mixed mode)
注意：有的安裝可能是1.8.0_151后面的配置JDK的需要自己做改動(dòng)，因?yàn)榘惭b目錄的版本號(hào)也不一樣的
Java1.8.0_151的安裝目錄是/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.151-5.b12.el7_4.x86_64
Java1.8.0_191的安裝目錄是/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.191.b12-1.el7_6.x86_64
配置JDK環(huán)境變量并生效
echo 'export JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.191.b12-1.el7_6.x86_64' >> ~/.bashrc
echo 'export JRE_HOME=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.191.b12-1.el7_6.x86_64' >> ~/.bashrc
echo 'export CLASSPATH=.:$JAVA_HOME/jre/lib:$JAVA_HOME/lib' >> ~/.bashrc
echo 'export PATH=$PATH:$JAVA_HOME/bin' >> ~/.bashrc
exec $SHELL -l
151的
echo 'export JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.151-5.b12.el7_4.x86_64' >> ~/.bashrc
echo 'export JRE_HOME=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.151-5.b12.el7_4.x86_64' >> ~/.bashrc
echo 'export CLASSPATH=.:$JAVA_HOME/jre/lib:$JAVA_HOME/lib' >> ~/.bashrc
echo 'export PATH=$PATH:$JAVA_HOME/bin' >> ~/.bashrc
exec $SHELL -l
242版本的
echo 'export JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.242.b08-0.el8_1.x86_64' >> ~/.bashrc
echo 'export JRE_HOME=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.242.b08-0.el8_1.x86_64' >> ~/.bashrc
echo 'export CLASSPATH=.:$JAVA_HOME/jre/lib:$JAVA_HOME/lib' >> ~/.bashrc
echo 'export PATH=$PATH:$JAVA_HOME/bin' >> ~/.bashrc
exec $SHELL -l
252版本的
echo 'export JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.252.b09-2.el7_8.x86_64' >> ~/.bashrc
echo 'export JRE_HOME=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.252.b09-2.el7_8.x86_64' >> ~/.bashrc
echo 'export CLASSPATH=.:$JAVA_HOME/jre/lib:$JAVA_HOME/lib' >> ~/.bashrc
echo 'export PATH=$PATH:$JAVA_HOME/bin' >> ~/.bashrc
exec $SHELL -l
安裝Crypto
pip install crypto
