Unix Shell Scripting Tutorial - page 5

Question: What are the directory structure of unix?

1. /: This is the root directory which should contain only the directories.
2. /bin: Executable files are located here.
3. /dev: Device drivers
4. /etc: configuration files, valid user lists, groups, ethernet and hosts etc
5. /lib: shared library files and sometimes other kernel-related files.
6. /boot: files for booting the system.
7. /home: home directory for users and other accounts
8. /mnt: Used to mount other temporary file systems like CD/pendrive
9. /proc: Contains all processes marked as a file by process number.
10. /tmp: Holds temporary files used between system boots.
11. /user: Used for miscellaneous purposes.
12. /var: Typically contains log and print files.
13. /sbin: Contains binary (executable) files.
14. /kernel: kernel files

Question: How to create a new Group?

groupadd mynewgroup

Question: How to modify group name?

groupmod -n new_modified_group_name old_group_name

Question: How to delete group?

groupdel new_modified_group_name

Question: How to add a existing user to a group?

usermod -a -G mynewgroup username

-G Its for secondary group.
-g Its for primary group.


Question: How to change a User's Primary Group?

usermod -g groupname username  

Question: How to list groups of loggined user?

groups

Question: How to list groups of other user?

groups username

Question: How to Create a New User and Assign a Group?

useradd -G examplegroup username

Question: How to assign a user multiple groups?

usermod -a -G group1,group2,group3 username

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1. Unix Shell Scripting Tutorial - page 4.
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3. Unix Shell Scripting Tutorial - page 2.
4. Unix Shell Scripting Tutorial - page 1.