中国空间站官网,句容建设工程备案网站,建网站一般多少钱,学生ppt模板免费下载 素材文章目录 一#xff1a;机器103设置密钥对免密登录二#xff1a;机器102设置密钥对免密登录三#xff1a;机器103安装Hadoop安装包3.1#xff1a;wget拉取安装Hadoop包3.2#xff1a;解压移到指定目录3.2.1#xff1a;解压移动路径异常信息3.2.2#xff1a;切换指定目录… 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3.1wget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_HOME3.2.4.2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
[rootvboxnode3ccccccttttttchenyang ~]# 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:
[rootvboxnode3ccccccttttttchenyang ~]# ls anaconda-ks.cfg before-calico.yaml bigdata calico.yaml logs recommended.yaml [rootvboxnode3ccccccttttttchenyang ~]# cd /root [rootvboxnode3ccccccttttttchenyang ~]# ls anaconda-ks.cfg before-calico.yaml bigdata calico.yaml logs recommended.yaml
[rootvboxnode3ccccccttttttchenyang ~]# 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 rootvboxnode3ccccccttttttchenyang The key’s randomart image is: ±–[RSA 2048]---- |oBB o. . .oo | |*. . . o o | |B . . * .E .| |o o . . o . . | |. o . S o . . | | . o . | | o | | o o | | . | ±—[SHA256]----- [rootvboxnode3ccccccttttttchenyang ~]# cd /root/.ssh [rootvboxnode3ccccccttttttchenyang .ssh]# ls id_rsa id_rsa.pub
二机器102设置密钥对免密登录
[rootvboxnode3ccccccttttttchenyang .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) cant be established.
ECDSA key fingerprint is SHA256:SGpvRTxwvfuiJB6NGl0IRJZ0Bh4ggdISEqytykpPN8.
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
rootchenyang-mine-vbox02s password:
Permission denied, please try again.
rootchenyang-mine-vbox02s password:
Permission denied, please try again.
rootchenyang-mine-vbox02s password:
Permission denied (publickey,gssapi-keyex,gssapi-with-mic,password).[rootvboxnode3ccccccttttttchenyang .ssh]# ssh chenyang-mine-vbox02
rootchenyang-mine-vbox02s 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[rootchenyang-mine-vbox02 ~]# ssh vboxnode3ccccccttttttchenyang
The authenticity of host vboxnode3ccccccttttttchenyang (192.168.56.103) cant be established.
ECDSA key fingerprint is SHA256:SGpvRTxwvfuiJB6NGl0IRJZ0Bh4ggdISEqytykpPN8.
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.
rootvboxnode3ccccccttttttchenyangs password:
Last login: Sun Aug 27 22:48:56 2023 from 192.168.56.1[rootvboxnode3ccccccttttttchenyang ~]# ls
anaconda-ks.cfg before-calico.yaml bigdata calico.yaml logs recommended.yaml三机器103安装Hadoop安装包
3.1wget拉取安装Hadoop包
wget https://mirrors.aliyun.com/apache/hadoop/common/hadoop-2.10.1/hadoop-2.10.1.tar.gz
wget https://mirrors.aliyun.com/apache/hadoop/common/hadoop-2.10.1/hadoop-2.10.1.tar.gz[rootvboxnode3ccccccttttttchenyang ~]# 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 37s2023-08-27 23:00:26 (10.5 MB/s) - 已保存 “hadoop-2.10.1.tar.gz” [408587111/408587111])[rootvboxnode3ccccccttttttchenyang ~]# cd /usr/local/home/
[rootvboxnode3ccccccttttttchenyang home]# ;ls
-bash: 未预期的符号 ; 附近有语法错误
[rootvboxnode3ccccccttttttchenyang home]# ls
bigdata docker log.file sentinel-dashboard-1.8.6.jar server
[rootvboxnode3ccccccttttttchenyang home]# cd bigdata/
[rootvboxnode3ccccccttttttchenyang bigdata]# ls
[rootvboxnode3ccccccttttttchenyang bigdata]# pwd
/usr/local/home/bigdata
[rootvboxnode3ccccccttttttchenyang bigdata]# cd ~
[rootvboxnode3ccccccttttttchenyang ~]# ls
anaconda-ks.cfg before-calico.yaml bigdata calico.yaml hadoop-2.10.1.tar.gz logs recommended.yaml3.2解压移到指定目录
3.2.1解压移动路径异常信息
[rootvboxnode3ccccccttttttchenyang ~]# 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
[rootvboxnode3ccccccttttttchenyang ~]# 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
[rootvboxnode3ccccccttttttchenyang ~]# rm -rf bigdata/
[rootvboxnode3ccccccttttttchenyang ~]# ls
anaconda-ks.cfg before-calico.yaml calico.yaml logs recommended.yaml
[rootvboxnode3ccccccttttttchenyang ~]# 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 50s2023-08-27 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
[rootvboxnode3ccccccttttttchenyang ~]# cd /usr/local/home/bigdata
[rootvboxnode3ccccccttttttchenyang bigdata]# ls
[rootvboxnode3ccccccttttttchenyang 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 26s2023-08-27 23:07:38 (15.1 MB/s) - 已保存 “hadoop-2.10.1.tar.gz” [408587111/408587111])[rootvboxnode3ccccccttttttchenyang bigdata]# ls
hadoop-2.10.1.tar.gz
[rootvboxnode3ccccccttttttchenyang 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 [rootvboxnode3ccccccttttttchenyang 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 [rootvboxnode3ccccccttttttchenyang bigdata]# vi /etc/profile
[rootvboxnode3ccccccttttttchenyang 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)
[rootvboxnode3ccccccttttttchenyang bigdata]# javac
用法: javac options source files
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 class1[,class2,class3...] 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
[rootvboxnode3ccccccttttttchenyang bigdata]# export
declare -x HADOOP_HOME/usr/local/home/bigdata/hadoop-2.10.1
declare -x HISTCONTROLignoredups
declare -x HISTSIZE1000
declare -x HOME/root
declare -x HOSTNAMEvboxnode3ccccccttttttchenyang
declare -x KUBECONFIG/etc/kubernetes/kubelet.conf
declare -x LANGzh_CN.UTF-8
declare -x LESSOPEN||/usr/bin/lesspipe.sh %s
declare -x LOGNAMEroot
declare -x LS_COLORSrs0:di01;34:ln01;36:mh00:pi40;33:so01;35:do01;35:bd40;33;01:cd40;33;01:or40;31;01:mi01;05;37;41:su37;41:sg30;43:ca30;41:tw30;42:ow34;42:st37;44:ex01;32:*.tar01;31:*.tgz01;31:*.arc01;31:*.arj01;31:*.taz01;31:*.lha01;31:*.lz401;31:*.lzh01;31:*.lzma01;31:*.tlz01;31:*.txz01;31:*.tzo01;31:*.t7z01;31:*.zip01;31:*.z01;31:*.Z01;31:*.dz01;31:*.gz01;31:*.lrz01;31:*.lz01;31:*.lzo01;31:*.xz01;31:*.bz201;31:*.bz01;31:*.tbz01;31:*.tbz201;31:*.tz01;31:*.deb01;31:*.rpm01;31:*.jar01;31:*.war01;31:*.ear01;31:*.sar01;31:*.rar01;31:*.alz01;31:*.ace01;31:*.zoo01;31:*.cpio01;31:*.7z01;31:*.rz01;31:*.cab01;31:*.jpg01;35:*.jpeg01;35:*.gif01;35:*.bmp01;35:*.pbm01;35:*.pgm01;35:*.ppm01;35:*.tga01;35:*.xbm01;35:*.xpm01;35:*.tif01;35:*.tiff01;35:*.png01;35:*.svg01;35:*.svgz01;35:*.mng01;35:*.pcx01;35:*.mov01;35:*.mpg01;35:*.mpeg01;35:*.m2v01;35:*.mkv01;35:*.webm01;35:*.ogm01;35:*.mp401;35:*.m4v01;35:*.mp4v01;35:*.vob01;35:*.qt01;35:*.nuv01;35:*.wmv01;35:*.asf01;35:*.rm01;35:*.rmvb01;35:*.flc01;35:*.avi01;35:*.fli01;35:*.flv01;35:*.gl01;35:*.dl01;35:*.xcf01;35:*.xwd01;35:*.yuv01;35:*.cgm01;35:*.emf01;35:*.axv01;35:*.anx01;35:*.ogv01;35:*.ogx01;35:*.aac01;36:*.au01;36:*.flac01;36:*.mid01;36:*.midi01;36:*.mka01;36:*.mp301;36:*.mpc01;36:*.ogg01;36:*.ra01;36:*.wav01;36:*.axa01;36:*.oga01;36:*.spx01;36:*.xspf01;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 SHLVL1
declare -x SSH_CLIENT192.168.56.102 48468 22
declare -x SSH_CONNECTION192.168.56.102 48468 192.168.56.103 22
declare -x SSH_TTY/dev/pts/1
declare -x TERMxterm
declare -x USERroot
declare -x XDG_RUNTIME_DIR/run/user/0
declare -x XDG_SESSION_ID33.2.4.2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。
[rootvboxnode3ccccccttttttchenyang bigdata]# which java
/usr/bin/java
[rootvboxnode3ccccccttttttchenyang bigdata]# ls -lr /usr/bin/java
lrwxrwxrwx. 1 root root 22 4月 7 19:15 /usr/bin/java - /etc/alternatives/java
[rootvboxnode3ccccccttttttchenyang 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
[rootvboxnode3ccccccttttttchenyang ~]# echo $JAVA_HOME
[rootvboxnode3ccccccttttttchenyang ~]# vi /etc/profile
export JAVA_HOME/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.362.b08-1.el7_9.x86_64
export JRE_HOME$JAVA_HOME/jre
export CLASSPATH$JAVA_HOME/lib:$JRE_HOME/lib:$CLASSPATHexport PATH USER LOGNAME MAIL HOSTNAME HISTSIZE HISTCONTROL
export HADOOP_HOME/usr/local/home/bigdata/hadoop-2.10.1
export PATH$PATH:$HADOOP_HOME/bin:$HADOOP_HOME/sbin:$JAVA_HOME:$JRE_HOME/lib:$CLASSPATH
已经可以查看到JAVA_HOME
[rootvboxnode3ccccccttttttchenyang ~]# 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 HISTCONTROLignoredups
declare -x HISTSIZE1000
declare -x HOME/root
declare -x HOSTNAMEvboxnode3ccccccttttttchenyang
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 LANGzh_CN.UTF-8
declare -x LESSOPEN||/usr/bin/lesspipe.sh %s
declare -x LOGNAMEroot
[rootvboxnode3ccccccttttttchenyang ~]# echo $JAVA_HOME
/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.362.b08-1.el7_9.x86_643.2.3再次查看Hadoop版本
[rootvboxnode3ccccccttttttchenyang ~]# 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
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