Ubuntu下创建hadoop组和hadoop用户

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1、一、在Ubuntu下仓【J建hadoop组和hadoop用户增加hadoop用户组，同时在该组里增加hadoop用户，后续在涉及到hadoop操作时,我们使用该用户。1、创建hadoop用户组liusnouqian^ubuntu:sudoaddgrouphadoop[sudo]passwordforliushouqtan:Addinggrouphadoop'(GID1001)・・・Donee2、仓ij建hadoop用户sudoadduser-ingrouphadoophadoop回车后会提示输入新的UNIX密码，这是新建用户hadoop的密码，输入回车即可。如果不输入密码，

2、冋车后会重新提示输入密码，即密码不能为空。最后确认信息是否正确，如杲没问题，输入Y,回车即可。ltushouqtan@ubuntu:*$sudoadduser-ingrouphadoophaoopAddinguser'haoop*••・Addingnewuserhaoop'(1001)withgrouphadoop'・・・Creatinghomedirectory'/home/haoop*・・・Copyingfilesfrom'/etc/skel'•••EnternewUNIXpassword:RetypenewUNIXpassword:Nopasswordsupplied

3、EnternewUNIXpassword:RetypenewUNIXpassword:passwd:passwordupdatedsuccessfullyChangingtheusertnformationforhaoopEnterthenewvalue,orpressENTERforthedefaultFullName[]:RoomNumber[]:WorkPhone[]:HomePhone[]:Other[]:Istheinformationcorrect?[Y/n]Y3、为hadoop用户添加权限输入：sudogedit/etc/sudoers回车，打开sudoers

4、文件给hadoop用八赋予和root用八同样的权限liushouqtan@ubuntu:〜$sudogedit/etc/sudoersltushouqtan@ubun

5、二、用新增加的hadoop用户登录Ubuntu系统三、安装sshsudoapt-getinstallopenssh-serverhaoop@ubuntu:~$sudoapt・getinstallopenssh・server[sudo]passwordforhaoop:Readingpackagelists…DoneBuildingdependencytreeReadingstateinformation・・・

6、DoneThefollowingextrapackageswillbeinstalled:libck・connecto「0ncurses・te「Eopenssh・sftp・serverpython-requestspython-urlltb3ssh-tmport-tdSuggestedpackages:rsshmolly・guardmonkeysphereThefollowingNEWpackageswillbeinstalled:libck-connector©ncurses-ternopenssh・se「veropenssh-sftp-serverpython-requ

7、estspython-urlltb3ssh-tmport-tdOupgraded,7newlyinstalled,6toremoveand7notupgraded・Needtoget698kBofarchives・Afterthisoperation,3,832kBofadditionaldiskspacewillbeused.Doyouwanttocontinue?[Y/n]Y0%[Connectingtous.archive.ubuntu.com]

8、安装完成后，启动服务sudo/etc/init.d/sshstart查看服务是否正确启动：ps-e

9、grepsshhado

10、op@ubuntu:~$sudo/etc/xnxt.d/sshstarthadoop@ubuntu:~$ps

11、grepssh2153?00:00:00ssh・agent4046?O0：O0：0O!5sh・agent6216?00:00:00<5shd设置免密码登录，生成私钥和公钥ssh-keygen-trsa-P超大/••e«・+iadoop@ubuntu:-$ssh-keygen・trsa・PGeneratingpubltc/prtvatersakeypair,interfiletnwhichtosavethek