[BigData：Hadoop]：安装部署篇

文章目录

• 一：机器103设置密钥对免密登录
• 二：机器102设置密钥对免密登录
• 三：机器103安装Hadoop安装包
• • 3.1：wget拉取安装Hadoop包
  • 3.2：解压移到指定目录
  • • 3.2.1：解压移动路径异常信息
    • 3.2.2：切换指定目录，进行解压，因为上述还是不行，应该是根目录解压有限制
    • 3.2.3：安装成功，查看Hadoop版本
    • • 3.2.3.1：显示JAVA_HOME未找到
    • 3.2.4：配置Hadoop的Java环境变量
    • 3.2.4.1：查看环境变量配置发现没有JAVA_HOME
    • 3.2.4.2：解决：查看java安装目录
    • 3.2.3：再次查看Hadoop版本

一：机器103设置密钥对免密登录

root@vboxnode3ccccccttttttchenyang \~\]# ssh-keygen -t rsa Generating public/private rsa key pair. Enter file in which to save the key (/root/.ssh/id_rsa): Created directory '/root/.ssh'. Enter passphrase (empty for no passphrase): Enter same passphrase again: \[root@vboxnode3ccccccttttttchenyang \~\]# ls anaconda-ks.cfg before-calico.yaml bigdata calico.yaml logs recommended.yaml \[root@vboxnode3ccccccttttttchenyang \~\]# cd /root \[root@vboxnode3ccccccttttttchenyang \~\]# ls anaconda-ks.cfg before-calico.yaml bigdata calico.yaml logs recommended.yaml \[root@vboxnode3ccccccttttttchenyang \~\]# ssh-keygen -t rsa Generating public/private rsa key pair. Enter file in which to save the key (/root/.ssh/id_rsa): Enter passphrase (empty for no passphrase): Enter same passphrase again: Your identification has been saved in /root/.ssh/id_rsa. Your public key has been saved in /root/.ssh/id_rsa.pub. The key fingerprint is: SHA256:iDJChgXvhOSh9xBSNORW8fW8UeeHgTxwEYpbu3MPGUc root@vboxnode3ccccccttttttchenyang The key's randomart image is: ±--\[RSA 2048\]----+ \|oBB o. . .o=+o \| \|=\*.+ . . + ++o o \| \|++B . . \* .E .\| \|o= o . . o + . . \| \|. + o . S o . . \| \| . o . + \| \| o + \| \| o o \| \| . \| ±---\[SHA256\]-----+ \[root@vboxnode3ccccccttttttchenyang \~\]# cd /root/.ssh \[root@vboxnode3ccccccttttttchenyang .ssh\]# ls id_rsa id_rsa.pub ## 二：机器102设置密钥对免密登录 ```sql [root@vboxnode3ccccccttttttchenyang .ssh]# ssh-copy-id chenyang-mine-vbox02 /usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/root/.ssh/id_rsa.pub" The authenticity of host 'chenyang-mine-vbox02 (192.168.56.102)' can't be established. ECDSA key fingerprint is SHA256:SGpvRTxwvfuiJB6N+Gl0IRJZ0Bh4ggdISEqytykpPN8. ECDSA key fingerprint is MD5:2e:91:01:39:bd:6f:b9:a8:3b:3d:9c:07:3c:81:bc:c7. Are you sure you want to continue connecting (yes/no)? y Please type 'yes' or 'no': yes /usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed /usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys root@chenyang-mine-vbox02's password: Permission denied, please try again. root@chenyang-mine-vbox02's password: Permission denied, please try again. root@chenyang-mine-vbox02's password: Permission denied (publickey,gssapi-keyex,gssapi-with-mic,password). ``` ```sql [root@vboxnode3ccccccttttttchenyang .ssh]# ssh chenyang-mine-vbox02 root@chenyang-mine-vbox02's password: Last failed login: Sun Aug 27 22:58:22 CST 2023 from vboxnode3ccccccttttttchenyang on ssh:notty There were 3 failed login attempts since the last successful login. Last login: Sun Aug 27 22:52:26 2023 from 192.168.56.1 -bash: "export: 未找到命令 -bash: /etc/kubernetes/admin.conf: 没有那个文件或目录 -bash: /etc/kubernetes/kubelet.conf: 权限不够 -bash: "export: 未找到命令 ``` ```sql [root@chenyang-mine-vbox02 ~]# ssh vboxnode3ccccccttttttchenyang The authenticity of host 'vboxnode3ccccccttttttchenyang (192.168.56.103)' can't be established. ECDSA key fingerprint is SHA256:SGpvRTxwvfuiJB6N+Gl0IRJZ0Bh4ggdISEqytykpPN8. ECDSA key fingerprint is MD5:2e:91:01:39:bd:6f:b9:a8:3b:3d:9c:07:3c:81:bc:c7. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added 'vboxnode3ccccccttttttchenyang,192.168.56.103' (ECDSA) to the list of known hosts. root@vboxnode3ccccccttttttchenyang's password: Last login: Sun Aug 27 22:48:56 2023 from 192.168.56.1 [root@vboxnode3ccccccttttttchenyang ~]# ls anaconda-ks.cfg before-calico.yaml bigdata calico.yaml logs recommended.yaml ``` ## 三：机器103安装Hadoop安装包 ### 3.1：wget拉取安装Hadoop包 wget https://mirrors.aliyun.com/apache/hadoop/common/hadoop-2.10.1/hadoop-2.10.1.tar.gz ```sql wget https://mirrors.aliyun.com/apache/hadoop/common/hadoop-2.10.1/hadoop-2.10.1.tar.gz ``` ```sql [root@vboxnode3ccccccttttttchenyang ~]# wget https://mirrors.aliyun.com/apache/hadoop/common/hadoop-2.10.1/hadoop-2.10.1.tar.gz --2023-08-27 22:59:48-- https://mirrors.aliyun.com/apache/hadoop/common/hadoop-2.10.1/hadoop-2.10.1.tar.gz 正在解析主机 mirrors.aliyun.com (mirrors.aliyun.com)... 182.40.60.209, 140.249.32.209, 150.139.245.176, ... 正在连接 mirrors.aliyun.com (mirrors.aliyun.com)|182.40.60.209|:443... 已连接。 已发出 HTTP 请求，正在等待回应... 200 OK 长度：408587111 (390M) [application/octet-stream] 正在保存至: "hadoop-2.10.1.tar.gz" 100%[=================================================================================>] 408,587,111 7.86MB/s 用时 37s 2023-08-27 23:00:26 (10.5 MB/s) - 已保存 "hadoop-2.10.1.tar.gz" [408587111/408587111]) ``` ```sql [root@vboxnode3ccccccttttttchenyang ~]# cd /usr/local/home/ [root@vboxnode3ccccccttttttchenyang home]# ;ls -bash: 未预期的符号 `;' 附近有语法错误 [root@vboxnode3ccccccttttttchenyang home]# ls bigdata docker log.file sentinel-dashboard-1.8.6.jar server [root@vboxnode3ccccccttttttchenyang home]# cd bigdata/ [root@vboxnode3ccccccttttttchenyang bigdata]# ls [root@vboxnode3ccccccttttttchenyang bigdata]# pwd /usr/local/home/bigdata [root@vboxnode3ccccccttttttchenyang bigdata]# cd ~ [root@vboxnode3ccccccttttttchenyang ~]# ls anaconda-ks.cfg before-calico.yaml bigdata calico.yaml hadoop-2.10.1.tar.gz logs recommended.yaml ``` ### 3.2：解压移到指定目录 #### 3.2.1：解压移动路径异常信息 ```sql [root@vboxnode3ccccccttttttchenyang ~]# tar -zxvf hadoop-2.10.1.tar.gz //usr/local/home/bigdata tar: //usr/local/home/bigdata：归档中找不到 tar: 由于前次错误，将以上次的错误状态退出 [root@vboxnode3ccccccttttttchenyang ~]# tar -zxvf hadoop-2.10.1.tar.gz /usr/local/home/bigdata tar: /usr/local/home/bigdata：归档中找不到 tar: 由于前次错误，将以上次的错误状态退出 [root@vboxnode3ccccccttttttchenyang ~]# rm -rf bigdata/ [root@vboxnode3ccccccttttttchenyang ~]# ls anaconda-ks.cfg before-calico.yaml calico.yaml logs recommended.yaml [root@vboxnode3ccccccttttttchenyang ~]# wget https://mirrors.aliyun.com/apache/hadoop/common/hadoop-2.10.1/hadoop-2.10.1.tar.gz --2023-08-27 23:04:49-- https://mirrors.aliyun.com/apache/hadoop/common/hadoop-2.10.1/hadoop-2.10.1.tar.gz 正在解析主机 mirrors.aliyun.com (mirrors.aliyun.com)... 140.249.32.209, 150.139.245.176, 117.24.169.248, ... 正在连接 mirrors.aliyun.com (mirrors.aliyun.com)|140.249.32.209|:443... 已连接。 已发出 HTTP 请求，正在等待回应... 200 OK 长度：408587111 (390M) [application/octet-stream] 正在保存至: "hadoop-2.10.1.tar.gz" 100%[=================================================================================>] 408,587,111 15.4MB/s 用时 50s 2023-08-27 23:05:39 (7.80 MB/s) - 已保存 "hadoop-2.10.1.tar.gz" [408587111/408587111]) ``` #### 3.2.2：切换指定目录，进行解压，因为上述还是不行，应该是根目录解压有限制 切换指定目录，进行解压，因为上述还是不行，应该是根目录解压有限制 ```sql [root@vboxnode3ccccccttttttchenyang ~]# cd /usr/local/home/bigdata [root@vboxnode3ccccccttttttchenyang bigdata]# ls [root@vboxnode3ccccccttttttchenyang bigdata]# wget https://mirrors.aliyun.com/apache/hadoop/common/hadoop-2.10.1/hadoop-2.10.1.tar.gz --2023-08-27 23:07:12-- https://mirrors.aliyun.com/apache/hadoop/common/hadoop-2.10.1/hadoop-2.10.1.tar.gz 正在解析主机 mirrors.aliyun.com (mirrors.aliyun.com)... 182.40.60.209, 150.139.245.178, 150.139.245.179, ... 正在连接 mirrors.aliyun.com (mirrors.aliyun.com)|182.40.60.209|:443... 已连接。 已发出 HTTP 请求，正在等待回应... 200 OK 长度：408587111 (390M) [application/octet-stream] 正在保存至: "hadoop-2.10.1.tar.gz" 100%[=================================================================================>] 408,587,111 15.1MB/s 用时 26s 2023-08-27 23:07:38 (15.1 MB/s) - 已保存 "hadoop-2.10.1.tar.gz" [408587111/408587111]) ``` ```sql [root@vboxnode3ccccccttttttchenyang bigdata]# ls hadoop-2.10.1.tar.gz [root@vboxnode3ccccccttttttchenyang bigdata]# tar -zxvf hadoop-2.10.1.tar.gz hadoop-2.10.1/ hadoop-2.10.1/bin/ hadoop-2.10.1/bin/hadoop hadoop-2.10.1/bin/hadoop.cmd hadoop-2.10.1/bin/rcc hadoop-2.10.1/bin/hdfs hadoop-2.10.1/bin/hdfs.cmd hadoop-2.10.1/bin/container-executor hadoop-2.10.1/bin/test-container-executor hadoop-2.10.1/bin/yarn hadoop-2.10.1/bin/yarn.cmd hadoop-2.10.1/bin/mapred hadoop-2.10.1/bin/mapred.cmd hadoop-2.10.1/etc/ hadoop-2.10.1/etc/hadoop/ hadoop-2.10.1/etc/hadoop/core-site.xml hadoop-2.10.1/etc/hadoop/ssl-client.xml.example hadoop-2.10.1/etc/hadoop/ssl-server.xml.example hadoop-2.10.1/etc/hadoop/hadoop-env.cmd hadoop-2.10.1/etc/hadoop/hadoop-env.sh hadoop-2.10.1/etc/hadoop/hadoop-metrics.properties hadoop-2.10.1/etc/hadoop/hadoop-metrics2.properties hadoop-2.10.1/etc/hadoop/hadoop-policy.xml hadoop-2.10.1/etc/hadoop/log4j.properties hadoop-2.10.1/etc/hadoop/hdfs-site.xml hadoop-2.10.1/etc/hadoop/httpfs-log4j.properties hadoop-2.10.1/etc/hadoop/httpfs-site.xml hadoop-2.10.1/etc/hadoop/httpfs-env.sh hadoop-2.10.1/etc/hadoop/httpfs-signature.secret hadoop-2.10.1/etc/hadoop/kms-acls.xml hadoop-2.10.1/etc/hadoop/kms-env.sh hadoop-2.10.1/etc/hadoop/kms-log4j.properties hadoop-2.10.1/etc/hadoop/kms-site.xml hadoop-2.10.1/etc/hadoop/yarn-env.cmd hadoop-2.10.1/etc/hadoop/yarn-site.xml hadoop-2.10.1/etc/hadoop/container-executor.cfg hadoop-2.10.1/etc/hadoop/slaves hadoop-2.10.1/etc/hadoop/yarn-env.sh hadoop-2.10.1/etc/hadoop/capacity-scheduler.xml hadoop-2.10.1/etc/hadoop/configuration.xsl hadoop-2.10.1/etc/hadoop/mapred-queues.xml.template hadoop-2.10.1/etc/hadoop/mapred-env.cmd hadoop-2.10.1/etc/hadoop/mapred-env.sh hadoop-2.10.1/etc/hadoop/mapred-site.xml.template hadoop-2.10.1/lib/ hadoop-2.10.1/lib/native/ hadoop-2.10.1/lib/native/examples/ hadoop-2.10.1/lib/native/examples/pipes-sort hadoop-2.10.1/lib/native/examples/wordcount-nopipe hadoop-2.10.1/lib/native/examples/wordcount-part hadoop-2.10.1/lib/native/examples/wordcount-simple hadoop-2.10.1/lib/native/libhadoop.a hadoop-2.10.1/lib/native/libhadoop.so hadoop-2.10.1/lib/native/libhadoop.so.1.0.0 hadoop-2.10.1/lib/native/libhdfs.a hadoop-2.10.1/lib/native/libhdfs.so hadoop-2.10.1/lib/native/libhdfs.so.0.0.0 hadoop-2.10.1/lib/native/libhadooputils.a hadoop-2.10.1/lib/native/libhadooppipes.a hadoop-2.10.1/libexec/ hadoop-2.10.1/libexec/hadoop-config.cmd hadoop-2.10.1/libexec/hadoop-config.sh hadoop-2.10.1/libexec/hdfs-config.cmd hadoop-2.10.1/libexec/hdfs-config.sh hadoop-2.10.1/libexec/httpfs-config.sh hadoop-2.10.1/libexec/kms-config.sh hadoop-2.10.1/libexec/yarn-config.cmd hadoop-2.10.1/libexec/yarn-config.sh hadoop-2.10.1/libexec/mapred-config.cmd hadoop-2.10.1/libexec/mapred-config.sh hadoop-2.10.1/sbin/ hadoop-2.10.1/sbin/FederationStateStore/ hadoop-2.10.1/sbin/FederationStateStore/MySQL/ hadoop-2.10.1/sbin/FederationStateStore/MySQL/FederationStateStoreDatabase.sql hadoop-2.10.1/sbin/FederationStateStore/MySQL/FederationStateStoreStoredProcs.sql hadoop-2.10.1/sbin/FederationStateStore/MySQL/FederationStateStoreUser.sql hadoop-2.10.1/sbin/FederationStateStore/MySQL/dropDatabase.sql hadoop-2.10.1/sbin/FederationStateStore/MySQL/dropStoreProcedures.sql hadoop-2.10.1/sbin/FederationStateStore/MySQL/dropTables.sql hadoop-2.10.1/sbin/FederationStateStore/MySQL/dropUser.sql hadoop-2.10.1/sbin/FederationStateStore/MySQL/FederationStateStoreTables.sql hadoop-2.10.1/sbin/FederationStateStore/SQLServer/ hadoop-2.10.1/sbin/FederationStateStore/SQLServer/FederationStateStoreStoreProcs.sql hadoop-2.10.1/sbin/FederationStateStore/SQLServer/FederationStateStoreTables.sql hadoop-2.10.1/sbin/stop-all.sh hadoop-2.10.1/sbin/start-all.cmd hadoop-2.10.1/sbin/stop-all.cmd hadoop-2.10.1/sbin/hadoop-daemon.sh hadoop-2.10.1/sbin/hadoop-daemons.sh hadoop-2.10.1/sbin/slaves.sh hadoop-2.10.1/sbin/start-all.sh hadoop-2.10.1/sbin/distribute-exclude.sh hadoop-2.10.1/sbin/hdfs-config.cmd hadoop-2.10.1/sbin/start-dfs.cmd hadoop-2.10.1/sbin/stop-dfs.cmd hadoop-2.10.1/sbin/hdfs-config.sh hadoop-2.10.1/sbin/refresh-namenodes.sh hadoop-2.10.1/sbin/start-balancer.sh hadoop-2.10.1/sbin/start-dfs.sh hadoop-2.10.1/sbin/start-secure-dns.sh hadoop-2.10.1/sbin/stop-balancer.sh hadoop-2.10.1/sbin/stop-dfs.sh hadoop-2.10.1/sbin/stop-secure-dns.sh hadoop-2.10.1/sbin/httpfs.sh hadoop-2.10.1/sbin/kms.sh hadoop-2.10.1/sbin/start-yarn.cmd hadoop-2.10.1/sbin/stop-yarn.cmd hadoop-2.10.1/sbin/start-yarn.sh hadoop-2.10.1/sbin/stop-yarn.sh hadoop-2.10.1/sbin/yarn-daemon.sh hadoop-2.10.1/sbin/yarn-daemons.sh hadoop-2.10.1/sbin/mr-jobhistory-daemon.sh hadoop-2.10.1/share/ hadoop-2.10.1/share/doc/ hadoop-2.10.1/share/doc/hadoop/ hadoop-2.10.1/share/doc/hadoop/common/ hadoop-2.10.1/share/doc/hadoop/common/api/ ``` #### 3.2.3：安装成功，查看Hadoop版本 ##### 3.2.3.1：显示JAVA_HOME未找到 hadoop version \[root@vboxnode3ccccccttttttchenyang bigdata\]# hadoop version Error: JAVA_HOME is not set and could not be found. #### 3.2.4：配置Hadoop的Java环境变量  ```powershell [root@vboxnode3ccccccttttttchenyang bigdata]# vi /etc/profile [root@vboxnode3ccccccttttttchenyang bigdata]# java -version openjdk version "1.8.0_362" OpenJDK Runtime Environment (build 1.8.0_362-b08) OpenJDK 64-Bit Server VM (build 25.362-b08, mixed mode) [root@vboxnode3ccccccttttttchenyang bigdata]# javac 用法: javac 其中, 可能的选项包括: -g 生成所有调试信息 -g:none 不生成任何调试信息 -g:{lines,vars,source} 只生成某些调试信息 -nowarn 不生成任何警告 -verbose 输出有关编译器正在执行的操作的消息 -deprecation 输出使用已过时的 API 的源位置 -classpath <路径> 指定查找用户类文件和注释处理程序的位置 -cp <路径> 指定查找用户类文件和注释处理程序的位置 -sourcepath <路径> 指定查找输入源文件的位置 -bootclasspath <路径> 覆盖引导类文件的位置 -extdirs <目录> 覆盖所安装扩展的位置 -endorseddirs <目录> 覆盖签名的标准路径的位置 -proc:{none,only} 控制是否执行注释处理和/或编译。 -processor [,,...] 要运行的注释处理程序的名称; 绕过默认的搜索进程 -processorpath <路径> 指定查找注释处理程序的位置 -parameters 生成元数据以用于方法参数的反射 -d <目录> 指定放置生成的类文件的位置 -s <目录> 指定放置生成的源文件的位置 -h <目录> 指定放置生成的本机标头文件的位置 -implicit:{none,class} 指定是否为隐式引用文件生成类文件 -encoding <编码> 指定源文件使用的字符编码 -source <发行版> 提供与指定发行版的源兼容性 -target <发行版> 生成特定 VM 版本的类文件 -profile <配置文件> 请确保使用的 API 在指定的配置文件中可用 -version 版本信息 -help 输出标准选项的提要 -A关键字[=值] 传递给注释处理程序的选项 -X 输出非标准选项的提要 -J<标记> 直接将 <标记> 传递给运行时系统 -Werror 出现警告时终止编译 @<文件名> 从文件读取选项和文件名 ``` #### 3.2.4.1：查看环境变量配置发现没有JAVA_HOME ```sql [root@vboxnode3ccccccttttttchenyang bigdata]# export declare -x HADOOP_HOME="/usr/local/home/bigdata/hadoop-2.10.1" declare -x HISTCONTROL="ignoredups" declare -x HISTSIZE="1000" declare -x HOME="/root" declare -x HOSTNAME="vboxnode3ccccccttttttchenyang" declare -x KUBECONFIG="/etc/kubernetes/kubelet.conf" declare -x LANG="zh_CN.UTF-8" declare -x LESSOPEN="||/usr/bin/lesspipe.sh %s" declare -x LOGNAME="root" declare -x LS_COLORS="rs=0:di=01;34:ln=01;36:mh=00:pi=40;33:so=01;35:do=01;35:bd=40;33;01:cd=40;33;01:or=40;31;01:mi=01;05;37;41:su=37;41:sg=30;43:ca=30;41:tw=30;42:ow=34;42:st=37;44:ex=01;32:*.tar=01;31:*.tgz=01;31:*.arc=01;31:*.arj=01;31:*.taz=01;31:*.lha=01;31:*.lz4=01;31:*.lzh=01;31:*.lzma=01;31:*.tlz=01;31:*.txz=01;31:*.tzo=01;31:*.t7z=01;31:*.zip=01;31:*.z=01;31:*.Z=01;31:*.dz=01;31:*.gz=01;31:*.lrz=01;31:*.lz=01;31:*.lzo=01;31:*.xz=01;31:*.bz2=01;31:*.bz=01;31:*.tbz=01;31:*.tbz2=01;31:*.tz=01;31:*.deb=01;31:*.rpm=01;31:*.jar=01;31:*.war=01;31:*.ear=01;31:*.sar=01;31:*.rar=01;31:*.alz=01;31:*.ace=01;31:*.zoo=01;31:*.cpio=01;31:*.7z=01;31:*.rz=01;31:*.cab=01;31:*.jpg=01;35:*.jpeg=01;35:*.gif=01;35:*.bmp=01;35:*.pbm=01;35:*.pgm=01;35:*.ppm=01;35:*.tga=01;35:*.xbm=01;35:*.xpm=01;35:*.tif=01;35:*.tiff=01;35:*.png=01;35:*.svg=01;35:*.svgz=01;35:*.mng=01;35:*.pcx=01;35:*.mov=01;35:*.mpg=01;35:*.mpeg=01;35:*.m2v=01;35:*.mkv=01;35:*.webm=01;35:*.ogm=01;35:*.mp4=01;35:*.m4v=01;35:*.mp4v=01;35:*.vob=01;35:*.qt=01;35:*.nuv=01;35:*.wmv=01;35:*.asf=01;35:*.rm=01;35:*.rmvb=01;35:*.flc=01;35:*.avi=01;35:*.fli=01;35:*.flv=01;35:*.gl=01;35:*.dl=01;35:*.xcf=01;35:*.xwd=01;35:*.yuv=01;35:*.cgm=01;35:*.emf=01;35:*.axv=01;35:*.anx=01;35:*.ogv=01;35:*.ogx=01;35:*.aac=01;36:*.au=01;36:*.flac=01;36:*.mid=01;36:*.midi=01;36:*.mka=01;36:*.mp3=01;36:*.mpc=01;36:*.ogg=01;36:*.ra=01;36:*.wav=01;36:*.axa=01;36:*.oga=01;36:*.spx=01;36:*.xspf=01;36:" declare -x MAIL="/var/spool/mail/root" declare -x OLDPWD="/root" declare -x PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin:/usr/local/home/bigdata/hadoop-2.10.1/bin:/usr/local/home/bigdata/hadoop-2.10.1/sbin" declare -x PWD="/usr/local/home/bigdata" declare -x SELINUX_LEVEL_REQUESTED="" declare -x SELINUX_ROLE_REQUESTED="" declare -x SELINUX_USE_CURRENT_RANGE="" declare -x SHELL="/bin/bash" declare -x SHLVL="1" declare -x SSH_CLIENT="192.168.56.102 48468 22" declare -x SSH_CONNECTION="192.168.56.102 48468 192.168.56.103 22" declare -x SSH_TTY="/dev/pts/1" declare -x TERM="xterm" declare -x USER="root" declare -x XDG_RUNTIME_DIR="/run/user/0" declare -x XDG_SESSION_ID="3" ``` #### 3.2.4.2：解决：查看java安装目录 关于命令：ls -lr 列出目录中的文件和子目录列表。但是，ls-lr命令可以递归地列出指定目录下的所有的子目录文件和信息，并按照文件修改时间的顺序排序。 如果想在指定目录下，查看所有文件和子目录的详细信息并且以递归形式展示，可以使用"ls -lR"命令。 关于命令：ls -lrt 实际上是代表了 "-l -r -t" 这三个选项集合。 ```powershell [root@vboxnode3ccccccttttttchenyang bigdata]# which java /usr/bin/java [root@vboxnode3ccccccttttttchenyang bigdata]# ls -lr /usr/bin/java lrwxrwxrwx. 1 root root 22 4月 7 19:15 /usr/bin/java -> /etc/alternatives/java [root@vboxnode3ccccccttttttchenyang bigdata]# ls -lrt /etc/alternatives/java lrwxrwxrwx. 1 root root 73 4月 7 19:15 /etc/alternatives/java -> /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.362.b08-1.el7_9.x86_64/jre/bin/java/ 找到安装目录：/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.362.b08-1.el7_9.x86_64 [root@vboxnode3ccccccttttttchenyang ~]# echo $JAVA_HOME [root@vboxnode3ccccccttttttchenyang ~]# vi /etc/profile export JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.362.b08-1.el7_9.x86_64 export JRE_HOME=$JAVA_HOME/jre export CLASSPATH=$JAVA_HOME/lib:$JRE_HOME/lib:$CLASSPATH export PATH USER LOGNAME MAIL HOSTNAME HISTSIZE HISTCONTROL export HADOOP_HOME=/usr/local/home/bigdata/hadoop-2.10.1 export PATH=$PATH:$HADOOP_HOME/bin:$HADOOP_HOME/sbin:$JAVA_HOME:$JRE_HOME/lib:$CLASSPATH 已经可以查看到JAVA_HOME [root@vboxnode3ccccccttttttchenyang ~]# export declare -x CLASSPATH="/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.362.b08-1.el7_9.x86_64/lib:/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.362.b08-1.el7_9.x86_64/jre/lib:" declare -x HADOOP_HOME="/usr/local/home/bigdata/hadoop-2.10.1" declare -x HISTCONTROL="ignoredups" declare -x HISTSIZE="1000" declare -x HOME="/root" declare -x HOSTNAME="vboxnode3ccccccttttttchenyang" declare -x JAVA_HOME="/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.362.b08-1.el7_9.x86_64" declare -x JRE_HOME="/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.362.b08-1.el7_9.x86_64/jre" declare -x KUBECONFIG="/etc/kubernetes/kubelet.conf" declare -x LANG="zh_CN.UTF-8" declare -x LESSOPEN="||/usr/bin/lesspipe.sh %s" declare -x LOGNAME="root" [root@vboxnode3ccccccttttttchenyang ~]# echo $JAVA_HOME /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.362.b08-1.el7_9.x86_64 ``` #### 3.2.3：再次查看Hadoop版本 ```python [root@vboxnode3ccccccttttttchenyang ~]# hadoop version Hadoop 2.10.1 Subversion https://github.com/apache/hadoop -r 1827467c9a56f133025f28557bfc2c562d78e816 Compiled by centos on 2020-09-14T13:17Z Compiled with protoc 2.5.0 From source with checksum 3114edef868f1f3824e7d0f68be03650 This command was run using /usr/local/home/bigdata/hadoop-2.10.1/share/hadoop/common/hadoop-common-2.10.1.jar ```