linux安装jdk

参考：

https://www.cnblogs.com/xuliangxing/p/7066913.html

https://www.cnblogs.com/shihaiming/p/5809553.html

?

[[email?protected] /]# cd /usr/java/
[[email?protected] java]# ls
jdk1.8.0_211? jdk-8u211-linux-x64.tar.gz
[[email?protected] java]# cd /
[[email?protected] /]# vim /etc/profile
[[email?protected] /]# java -version
java version "1.8.0_211"
Java(TM) SE Runtime Environment (build 1.8.0_211-b12)
Java HotSpot(TM) 64-Bit Server VM (build 25.211-b12,mixed mode)
[[email?protected] /]#

??? pathmunge /sbin afterfiHOSTNAME=`/bin/hostname 2>/dev/null`HISTSIZE=1000if [ "$HISTCONTROL" = "ignorespace" ] ; then??? export HISTCONTROL=ignorebothelse??? export HISTCONTROL=ignoredupsfiexport PATH USER LOGNAME MAIL HOSTNAME HISTSIZE HISTCONTROL# By default,we want umask to get set. This sets it for login shell# Current threshold for system reserved uid/gids is 200# You could check uidgid reservation validity in# /usr/share/doc/setup-*/uidgid fileif [ $UID -gt 199 ] && [ "`id -gn`" = "`id -un`" ]; then??? umask 002else??? umask 022fi????? ????????? ?for i in /etc/profile.d/*.sh ; do??? if [ -r "$i" ]; then??????? if [ "${-#*i}" != "$-" ]; then??????????? . "$i"??????? else??????????? . "$i" >/dev/null 2>&1??????? fi??? fi done?? ?unset iunset -f pathmungeJAVA_HOME=/usr/java/jdk1.8.0_211JRE_HOME=${JAVA_HOME}/jreCLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib:$CLASSPATHJAVA_PATH=${JAVA_HOME}/bin:${JRE_HOME}/binPATH=$PATH:${JAVA_PATH}"/etc/profile" 84L,1909C???????????