Marco Education August 01 Homework

Job Requirements

use the learned knowledge to complete classroom exercises and after-school assignments

Classroom Exercises

1. Create the user Gentoo, the additional group is bin and root, the default shell is/bin/csh, the annotation information is "Gentoo distribution"

Thinking : The main option is to examine useradd.

- g,--groups group1[,group2,... [, GROUPN]] Join the specified group (the group must exist)

- s,--Shell shell specifies the default shell

- C,--comment Comment User's full name or comment

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2. Create the following user, group, and group memberships

• name admins 

• User Natasha , using Admins as a subordinate group

• user Harry, also use admins as a subordinate group

• user Sarah, no interactive login system, and not admins Member of  

• Natasha, Harry, Sarah, the code's all CentOS.

think: Simple to create groups, users.

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homework after class

1. create testuser UID 1234, primary Group: Bin, Auxiliary Group: ROOT,FTP,SHELL:/BIN/CSH Home:/testdir/testuser

thinking: Mainly familiar with useradd options,-D to specify the directory, the first to determine the existence of its parent directory

-C,--comment comment Add user's full name or comment

-D,--home-dir home_dir Specify home directory

-G,--gid Group specifies the primary group

-G,--groups group1[,group2,... [, GROUPN]] Specify additional groups

-U,--uid uid specified UID

-S,--shell shell specifies the default shell

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2. Modify TestUser uid:4321, primary Group: root, Auxiliary Group: Nobody,loginname:test,home:/home/test Home Data Migration

thinking: Mostly familiar options for Usermod

-U,--uid uid specified UID

-G,--gid Group specifies the primary group

-G,--groups group1[,group2,... [, GROUPN]] Specify a secondary group

-D,--home home_dir Specify home directory

-M,--move-home mobile home directory, typically used with-D

- L,--login new_login Specify a new login name

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3. Batch Create account: User1...user10

uid:3000-3009,shell:/bin/csh,home:/testdir/username

Passwd:usernamepass

Note Home directory-related configuration, so that users log on normally

thinking: Master NewUsers and chpasswd two commands, but also to confirm that the system is present/BIN/CSH

newusers Command Batch Create users, note that the file is the same as/etc/passwd, we can view the NewUsers man manual:

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chpasswd The file content format specified is LOGINNAME:PASSWD, we can also view the CHPASSWD man manual:

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This batch-created user does not import the default configuration of/etc/skel/, so it needs to be copied to the user's home directory manually .

prepare two texts first:

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These two commands are simple:

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Upon completion of execution, we can see that the home directory of each user is not initially configured. We need to manually copy the contents of the/etc/skel/, note : The CP matching source file needs to be noted, if /etc/skel/.* will match /etc/skel/... Causes the entire /etc/* to be copied over.

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The UERE2...USER10 also operates in the same way, skipping over here.

Marco Education August 01 Homework