马哥linux 0801作业

1. 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

2. 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:

3. Hello,I am 用户名,the system version is here,please help me to check it,thanks!

4. 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