万维网站建设,网络规划设计师适合干什么,第二季企业网站开发,东凤镇 网站建设使用场景#xff1a;使用软连接简化版本切换动作 进入操作目录#xff0c; cd /opt/modules/ 1、创建软连接ln -s jdk1.8.0_131 jdk1.8ln -s spark-2.1.0-bin-hadoop2.7 sparkln -s hadoop-2.7.3 hadoop 2、删除软连接rm -rf hadooprm -rf sparkrm -rf jdk1.8 3、验证结果 … 使用场景使用软连接简化版本切换动作   进入操作目录 cd /opt/modules/ 1、创建软连接ln -s jdk1.8.0_131 jdk1.8ln -s spark-2.1.0-bin-hadoop2.7 sparkln -s hadoop-2.7.3 hadoop   2、删除软连接rm -rf hadooprm -rf sparkrm -rf jdk1.8   3、验证结果 查看是否存在ll [rootLexiaofeiN1 modules]# ll总用量 16drwxr-xr-x 9 elasticsearch elasticsearch 4096 3月 23 16:32 elasticsearch5.2   lrwxrwxrwx 1 root root 12 4月 24 15:12 hadoop - hadoop-2.7.3drwxr-xr-x 9 root root 4096 4月 24 15:14 hadoop-2.7.3   lrwxrwxrwx 1 root root 25 4月 24 15:13 jdk1.8 - /opt/modules/jdk1.8.0_131drwxr-xr-x 8 uucp 143 4096 3月 15 16:35 jdk1.8.0_131   lrwxrwxrwx 1 root root 25 4月 24 15:15 spark - spark-2.1.0-bin-hadoop2.7drwxr-xr-x 12 lexiaofei lexiaofei 4096 12月 16 10:18 spark-2.1.0-bin-hadoop2.7   4、场景举例   4.1、修改path变量指向软连接jdk1.8和hadoopvi /etc/profile   4.2、生效配置修改source /etc/profile   4.3、检查配置是否修改成功   [rootLxfN1 ~]# java -versionjava version 1.8.0_131Java(TM) SE Runtime Environment (build 1.8.0_131-b11)Java HotSpot(TM) 64-Bit Server VM (build 25.131-b11, mixed mode) [rootLxfN1 ~]# javac -versionjavac 1.8.0_131   [rootLxfN1 ~]# hadoop versionHadoop 2.7.3Subversion https://git-wip-us.apache.org/repos/asf/hadoop.git -r baa91f7c6bc9cb92be5982de4719c1c8af91ccffCompiled by root on 2016-08-18T01:41ZCompiled with protoc 2.5.0From source with checksum 2e4ce5f957ea4db193bce3734ff29ff4This command was run using /opt/modules/hadoop-2.7.3/share/hadoop/common/hadoop-common-2.7.3.jar  转载于:https://www.cnblogs.com/lexiaofei/p/6757077.html