jdk的linux安装

[root@hadoop001 ~]# ll
total 717636
-rw-r--r-- 1 root root 185646832 Nov 28 08:56 jdk-8u181-linux-x64.tar.gz

[root@hadoop001 ~]# mkdir -p /usr/java

[root@hadoop001 ~]# tar -xzvf jdk-8u181-linux-x64.tar.gz -C /usr/java

[root@hadoop001 java]# ll
total 4
drwxr-xr-x 7 10 143 4096 Jul  7  2018 jdk1.8.0_181
[root@hadoop001 java]# chown -R root:root jdk1.8.0_181/
[root@hadoop001 java]# ll
total 4
drwxr-xr-x 7 root root 4096 Jul  7  2018 jdk1.8.0_181
[root@hadoop001 java]#

[root@hadoop001 java]# vi /etc/profile
export JAVA_HOME=/usr/java/jdk1.8.0_181
export PATH=${JAVA_HOME}/bin:$PATH
[root@hadoop001 java]# source /etc/profile
[root@hadoop001 java]# which java
/usr/java/jdk1.8.0_181/bin/java
[root@hadoop001 java]# echo $PATH
/usr/java/jdk1.8.0_181/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin