1.rpm-ivhjdk-7-linux-x64.rpm2.vi+/etc/profile增加:JAVA_HOME=/usr/java/jdk1.7.0JRE_HOME=/usr/java/jdk1.7.0/jrePATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/binCLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/libexportJAVA_HOMEJRE_HOMEPATHCLASSPATH3.使修改生效source/etc/profile//使修改立即生效echo$PATH//查看PATH值Ubuntu:<spanclass="tokenfunction">sudo</span><spanclass="tokenfunction">apt</span><spanclass="tokenfunction">install</span>lrzsz...