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将/etc/issue文件中的内容转换为大写后保存至/tmp/issue.out文件中
2.将当前系统登录用户的信息转换为大写后保存至/tmp/who.out文件中
-
3.一个linux用户给root发邮件,要求邮件标题为"help",邮件正文如下:
-
Hello,I am 用户名,the system version is here,please help me to check it,thanks!
-
操作系统版本信息
4.将/root/下文件列表,显示成一行,并文件名之间用空格隔开
5.file1文件的内容为:"1 2 3 4 5 6 7 8 9 10"计算出所有数字的总和
6.删除Windows文本中的'^M'字符
7.处理字符串"xt.,l 1 jr#!$mn2 c*/fe3 uz4”，"，只保留其中的数字和空格
8.将PATH变量每个目录显示在独立的一行
9.删除指定文件的空行
10.将文件中每个单词(字母)显示在独立的一行.并无空行
11.创建用户gentoo,附加组为bin和root,默认shell为/bin/csh,注释信息为"Gentoo Distribution"
[root@centos6 ~]# useradd -G bin,root -s /bin/csh -c "Genttoo Distribution" gentoo
[root@centos6 ~]# id gentoo
uid=501(gentoo) gid=501(gentoo) groups=501(gentoo),0(root),1(bin)
[root@centos6 ~]# finger gentoo
Login: gentoo Name: Genttoo Distribution
Directory: /home/gentoo Shell: /bin/csh
Never logged in.
No mail.
No Plan.
12.创建下面的用户,组和组成员的关系
名字为admins的组
用户natasha,使用admins作为附属组
用户harry,也是用admins作为附属组
用户sarah,不可交互登录系统,且不是adminis的成员
natasha,harry,sarah密码都是centos
[root@centos6 ~]# groupadd admins
[root@centos6 ~]# useradd -G admins natasha
[root@centos6 ~]# useradd -G admins harry
[root@centos6 ~]# useradd -s /sbin/nologin sarah
[root@centos6 ~]# echo "centos" | passwd –stdin natasha
Changing password for user natasha.
passwd: all authentication tokens updated successfully.
[root@centos6 ~]# echo "centos" | passwd –stdin harry
Changing password for user harry.
passwd: all authentication tokens updated successfully.
[root@centos6 ~]# echo "centos" | passwd –stdin sarah
Changing password for user sarah.
passwd: all authentication tokens updated successfully.
[root@centos6 ~]# getent group admins
admins:x:502:natasha,harry
13.批量创建用户,修改密码
"user.txt" [New File] 0,0-1 All
mage1:x:2501:2501::/home/mage1:/bin/bash
mage2:x:2502:2502::/home/mage2:/bin/bash
mage3:x:2503:2503::/home/mage3:/bin/bash
mage4:x:2504:2504::/home/mage4:/bin/bash
mage5:x:2505:2505::/home/mage5:/bin/bash
mage6:x:2506:2506::/home/mage6:/bin/bash
mage7:x:2507:2507::/home/mage7:/bin/bash
~
"user.txt" [New] 7L, 287C written
[root@localhost ~]# newusers user.txt
[root@localhost ~]# vim pass.txt
"pass.txt" [New File] 0,0-1 All
mage1:centos
mage2:centos
mage3:centos
mage4:centos
mage5:centos
mage6:centos
mage7:centos
"pass.txt" [New] 7L, 91C written
[root@localhost ~]# cat pass.txt|chpasswd
[root@localhost ~]# cp -r /etc/skel/.[^.]* /home/mage1
[root@localhost ~]# cp -r /etc/skel/.[^.]* /home/mage2
[root@localhost ~]# cp -r /etc/skel/.[^.]* /home/mage3
[root@localhost ~]# cp -r /etc/skel/.[^.]* /home/mage4
[root@localhost ~]# cp -r /etc/skel/.[^.]* /home/mage5
[root@localhost ~]# cp -r /etc/skel/.[^.]* /home/mage6
[root@localhost ~]# cp -r /etc/skel/.[^.]* /home/mage7
[root@localhost ~]# su – mage1
Last login: Tue Aug 2 21:19:43 CST 2016 on pts/1
[mage1@localhost ~]$
14.创建testuser uid 1234,主组：bin,辅助组：root,ftp,shell:/bin/csh home:/testdir/testuser
[root@localhost ~]# useradd testuser -u 123 -g bin -G root,ftp -s /bin/csh -b /testdir/testuser useradd: cannot create directory /testdir/testuser/testuser
[root@localhost ~]# id testuser
uid=123(testuser) gid=1(bin) groups=1(bin),0(root),50(ftp)
[root@localhost ~]# finger testuser
Login: testuser Name:
Directory: /testdir/testuser/testuser Shell: /bin/csh
Never logged in.
No mail.
No Plan.
15.修改testuser uid:4321,主组：root,辅助组：nobody,loginname:test，home:/home/test 家数据迁移
[root@localhost ~]# groupadd testuser
[root@localhost ~]# usermod -u 4321 -g root -G nobody,testuser -d /home/test testuser
[root@localhost ~]# finger testuser
Login: testuser Name:
Directory: /home/test Shell: /bin/csh
Never logged in.
No mail.
No Plan.
[root@localhost ~]# cp -r /etc/skel/.[^.]* /home/test
[root@localhost ~]# su – testuser
[testuser@localhost ~]$
16.
6、批量创建帐号：user1…user10
uid:3000-3009,shell:/bin/csh,home:/testdir/username
passwd:usernamepass
注意家目录相关配置，使用户正常登录
[root@localhost ~]# vim user.txt
"user.txt" [New File] 0,0-1 All
user1:x:3000:3000::/testdir/user1:/bin/csh
user2:x:3001:3001::/testdir/user2:/bin/csh
user3:x:3002:3002::/testdir/user3:/bin/csh
er4:x:3003:3003::/testdir/user4:/bin/csh
▽er5:x:3004:3004::/testdir/user5:/bin/csh
user6:x:3005:3005::/testdir/user6:/bin/csh
user7:x:3006:3006::/testdir/user7:/bin/csh
user8:x:3007:3007::/testdir/user8:/bin/csh
user9:x:3008:3008::/testdir/user9:/bin/csh
user10:x:3009:3009::/testdir/user10:/bin/csh
"user.txt" [New] 10L, 432C written
[root@localhost ~]# newusers user.txt
[root@localhost ~]# vim pass.txt
"pass.txt" [New File] 0,0-1 All
user1:user1pass
user2:user2pass
user3:user3pass
user4:user4pass
user5:user5pass
user6:user6pass
user7:user7pass
user8:user8pass
user9:user9pass
user10:user10pass
"pass.txt" [New] 10L, 162C written
[root@localhost ~]# cat pass.txt|chpasswd
[root@localhost ~]# cp -r /etc/skel/.[^.]* /testdir/user1
[root@localhost ~]# cp -r /etc/skel/.[^.]* /testdir/user2
[root@localhost ~]# cp -r /etc/skel/.[^.]* /testdir/user3
[root@localhost ~]# cp -r /etc/skel/.[^.]* /testdir/user4
[root@localhost ~]# cp -r /etc/skel/.[^.]* /testdir/user5
[root@localhost ~]# cp -r /etc/skel/.[^.]* /testdir/user6
[root@localhost ~]# cp -r /etc/skel/.[^.]* /testdir/user7
[root@localhost ~]# cp -r /etc/skel/.[^.]* /testdir/user8
[root@localhost ~]# cp -r /etc/skel/.[^.]* /testdir/user9
[root@localhost ~]# cp -r /etc/skel/.[^.]* /testdir/user10
[root@localhost ~]# su – user1
[root@localhost ~]# grtent passwd
user1:x:3000:3000::/testdir/user1:/bin/csh
user2:x:3001:3001::/testdir/user2:/bin/csh
user3:x:3002:3002::/testdir/user3:/bin/csh
user4:x:3003:3003::/testdir/user4:/bin/csh
user5:x:3004:3004::/testdir/user5:/bin/csh
user6:x:3005:3005::/testdir/user6:/bin/csh
user7:x:3006:3006::/testdir/user7:/bin/csh
user8:x:3007:3007::/testdir/user8:/bin/csh
user9:x:3008:3008::/testdir/user9:/bin/csh
user10:x:3009:3009::/testdir/user10:/bin/csh
原创文章，作者：Kartik，如若转载，请注明出处：http://www.178linux.com/28221
