What is SGID and how to set SGID in Linux/Unix?

This is next to SUID in our ongoing File and Folder permissions in Linux. We already discussed about CHMOD, UMASK, CHOWN, CHGRP and SUID File and folder permissions etc in our previous posts. In this post we will see

What is SGID?

Why we require SGID?

Where we are going to implement SGID?

How to implement SGID in Linux?

What is SGID?… Continue Reading

What is SUID and how to set SUID in Linux/Unix?

There are some other special permission apart from the normal file permissions read, write and execute. They are SUID, SGID, Sticky Bit, ACL’s and SELinux etc for granular file/folder management by administrator. In this post we will see

1)What’s SUID?
2)How to set SUID?
3)Where to us SUID?

What is SUID and how to set it in Linux?

SUID (Set owner User … Continue Reading

What is UMASK and how to define it in Linux?

UMASK(User Mask or User file creation MASK) is the default permission or base permissions given when a new file(even folder too, as Linux treats everything as files) is created on a Linux machine. Most of the Linux distros give 022(0022) as default UMASK. In other words, It is a system default permissions for newly created files/folders in the machine.

CHGRP(CHange GRouP) is one more command which is useful to change group associated to a file/folder from one group to other in a Linux box. This is sister command to chown which is used to change owner of the file/folder as well as group name associated with that file.

chgrp command syntax:

 chgrp options groupname file/foldername

Learn chgrp with examples:

Example1: Change group name:sales of a file to other group name:hrgroup.… Continue Reading

Update1:As of now we started with RHCE concepts and in future we will move on to advanced concepts such as virtualization, CVS, Monitoring, Storage etc.

Update2:Started posting on DNS stuff this month

Hi all,

We are planing to systematically write quality posts on Linux admin stuff at www.linuxnix.com which every Linux administrators are facing in day today activities. In order to bring similar topics under one umbrella we came up with a plan to address this. Linux is a … Continue Reading

This is our second post in “Linux Files and folders” Series and first one is about chmod command in detail. chown is a command to change the ownership of a file/folder or even multiple files/folders at a time to a specified user/group. CHOWN stands for CHange file OWNer and Group.

CHOWN syntax

you can use man command to get full details about chown command.

$man chown

$chown options user:group file/folder

In this … Continue Reading