大数据手动搭建步骤整理（二）ssh免密、jdk安装

主要内容：ssh免密、jdk安装

每一行外部的是命令。----内是打开文档写在内档内的内容

视频：

 1 [ssh免密]
 2 
 3 /root]#ssh-keygen -t rsa  -->masterslave1slave2
 4 
 5 cat id_rsa.pub >> authorized_keys    --->master
 6 
 7 ssh-copy-id -i master    --->slave1
 8 
 9 ssh-copy-id -i master    ---->slave2
10 
11 chmod 755 authorized_keys  --->master
12 
13 scp /root/.ssh/authorized_keys slave1:/root/.ssh/  -->master
14 
15 scp /root/.ssh/authorized_keys slave2:/root/.ssh/  --->master

 1 [JDK]
 2 
 3 mkdir -p /usr/java
 4 
 5 tar -zxvf/opt/soft/jdk-8u201-linux-x64.gz -C /usr/java    (jdk-8u201-linux-x64.gz)
 6 
 7 vi /etc/profile
 8 
 9 -----------------------------
10 
11 export JAVA_HOME=/usr/java/jdk1.8.0_171
12 
13 export CLASSPATH=$JAVA_HOME/lib/
14 
15 export PATH=$PATH:$JAVA_HOME/bin
16 
17 export PATH JAVA_HOME CLASSPATH
18 
19 -------------------------------
20 
21 source /etc/profile
22 
23 java -version
24 
25 scp -r /usr/java/ slave1:/usr/java/
26 
27 scp -r /usr/java/ slave2:/usr/java/