linux

查看u盘 1diskutil list 解挂u盘 1diskutil unmountDisk /dev/disk3 写系统到u盘 1sudo dd if=/Users/chenqi/Downloads/CentOS-7-x86_64-DVD-2009.iso of=/dev/rdisk3 bs=32m

下载JDK Java SE 8的官方网址 jdk下载路径 点击下载 解压文件 1tar -xvf jdk-8u65-linux-x64.tar.gz 添加环境变量 123456789echo " ">>/etc/profileecho "# Made for java env by chenqi on $(date +%F)">>/etc/profileecho 'export JAVA_HOME=/usr/local/java'>>/etc/profileecho 'export JRE_HOME=${JAVA_HOME}/jre'>>/etc/profileecho 'export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib'>>/etc/profileecho 'export...