Manejo de grupos

Curso de Administración de Servidores Linux: Manejo de Recursos

Bienvenida

Tus siguientes pasos en Linux

Arranque del sistema

¿Cómo es el arranque del sistema?

Modo recovery

Grupos y usuarios

¿Qué son los grupos y usuarios en Linux?

Manejo de usuarios

Manejo de grupos

Control de accesos

El control de accesos en Linux

Creación de un usuario administrador

Almacenamiento

Particionando y montando una unidad

¿Qué es RAID y LVM?

Proyecto 1: LVM sobre RAID 1

Creacion de sistema RAID 1

Creación de LVM sobre RAID 1

Agregando el sistema a fstab

Proyecto 2: Recuperar GRUB

Preparando el sistema

Escalando el sistema con chroot e instalando Grub

Conclusiones

¿Qué aprendimos?

You don't have access to this class

Keep learning! Join and start boosting your career

If you already have an account,

Resources

How to manage groups in Linux?

Delving into the world of Linux system administration involves efficiently managing user groups, which allow you to manage permissions for different users and facilitate administration by grouping them together. Would you like to learn how to manage groups properly and create shared folders? Read on!

How to view existing groups?

Groups in Linux are managed through a file similar to that of users. To view existing groups, you can use the following commands:

Show all groups on the system:

ls /etc/group

This command will show you a list of all groups configured on your system.

Search for a specific user in the groups:

cat /etc/group | grep username.

For example, to search for the user CodeBarz, the command would be:

cat /etc/group | grep CodeBarz

List all groups to which a user belongs:

groups

By entering this command while logged in, you will get all the groups to which the current user belongs.

Get users from a specific group:

To find out which users belong to a group such as sudo:

getent group sudo

How to create and modify a group?

Creating a group

To create a group in Linux, we use the groupadd command:

sudo groupadd group_name

For example, to create a group friends:

sudo groupadd friends

Renaming a group

If you want to change the name of the group for standard reasons, such as having it in English, we use groupmod:

sudo groupmod -n new_name current_name

Example when changing friends to friends:

sudo groupmod -n friends friends

How to create a shared folder?

To share files between two users in a folder:

Create the folder:

mkdir /path/to/directory/shared

Change the owner group of the folder:

chgrp group_shared /path/to/to/directory/shared.

Modify permissions:

The chmod command is used to set permissions to allow shared access:

chmod 770 /path/to/directory/shared

Apply special permissions (SGID):

This step is crucial so that any file created or modified in the folder maintains the owner group:

chmod g+s /path/to/directory/shared

How to add users to a group?

To add users to the created group, we use the usermod command:

sudo usermod -aG user_shared_group user

Do this for each user you want:

sudo usermod -aG friends so-and-sosudo usermod -aG friends perengano

How to remove users from a group and delete groups?

Remove a user from a group

Use the gpasswd command:

sudo gpasswd -d user group

To remove perengano from the friends group:

sudo gpasswd -d perengano friends

Removing a group

Finally, remove the group using groupdel:

sudo groupdel group_name

If you want to remove the friends group:

sudo groupdel friends

Mastering group administration in Linux is essential to conveniently manage permissions and resources on the system. By following these steps, you will be able to create safe and efficient collaborative environments. Keep exploring and learning about the fascinating world of Linux!

Contributions 30

Questions 1

Sort by:

Want to see more contributions, questions and answers from the community?

Lucas Rojas