GID, current, primary, supplementary, effective and real group IDs?
The following links discuss these concepts in different contexts. I have read their definitions, but I still can’t tell how they are related, or if some of them are just the same.
group
How can I change a user’s default group in Linux?
Being new to Linux administration, I’m a little confused about the following commands:
How do I extend a partition with a LVM and the contained physical volume and logical volume?
On my 240 GB SSD I had at first two partitions, one containing the Logical Volume with Linux Mint and the other had contained a NTFS partition to share with Windows.
Group member cannot write even with write permission
The logged in user is a member of a group that has a write permission on a folder. But when this user is trying to write something, “permission is denied”.
Where did the “wheel” group get its name?
The wheel group on *nix computers typically refers to the group with some sort of root-like access. I’ve heard that on some *nixes it’s the group of users with the right to run su, but on Linux that seems to be anyone (although you need the root password, naturally). On Linux distributions I’ve used it seems to be the group that by default has the right to use sudo; there’s an entry in sudoers for them:
How to restrict a user to one folder and not allow them to move out his folder
I have ubuntu server on digitalocean and I want to give someone a folder for their domain on my server, my problem is, I don’t want that user to see my folders or files or to be able to move out their folder.
In /etc/group what is the meaning of the second field?
A sample /etc/group file contains the following entries:
Directory permissions vs file permssions
If I have two users called john and sally. Both are part of the users group. john creates a directory with permissions 775. sally then puts a file there with 644 permissions.
How do I remove a user from a group?
Which command should I use to remove a user from a group in Debian?