groups

Wat het doet

Zo schrijf je het

groups [OPTION]... [USER]...

Meest gebruikt

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$ als gewone gebruiker# als root (of met sudo)

1. 1My groups

   $groups
   student wheel

   The first is the primary group.

2. 2Groups of other users

   $groups lisa omar
   lisa : lisa webadmins
   omar : omar wheel webadmins

   With names, each line starts with the user.

3. 3After adding a group

   #usermod -aG webadmins student
   $groups; groups student
   student wheel
   student : student wheel webadmins

   The shell gets the new group only after a new login.

4. 4Check admin rights quickly

   $groups | grep -qw wheel && echo "you can use sudo"

   wheel = sudo on RHEL.

5. 5Count the groups of a user

   $groups lisa | wc -w

   The output includes the name and the colon for a named user.

6. 6Use it in a script for many users

   $for u in anna bob carol; do groups "$u"; done

   Fast check after a lab.

7. 7Compare with id

   $id -Gn lisa

   Same names, no "lisa :" before them.

8. 8Check a group for a shared folder

   $groups | grep -w sales

   Needed to write in a folder owned by group sales.

9. 9Check the groups of a service user

   $groups apache
   apache : apache

   Service accounts should have as few groups as possible.

10. 10Find members of the docker or wheel group (audit)

    $getent group wheel

    groups shows per user; getent group shows per group.

Niets past bij dit filter.

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