[WEBINAR] Application Acceleration: Faster Performance for End Users

Change Mode (chmod)

Definition - What does Change Mode (chmod) mean?

Change mode (chmod) is a Unix operating system command used by administrators and programmers to set or change the access permissions of a file or directory. These settings determine the level of access to be granted to the given file or directory.

The chmod command was first used in ATT Unix 1 and is still in use today by Unix-like operating systems. It is also available as a C language library function in Unix.

Techopedia explains Change Mode (chmod)

The syntax for change mode is as follows:


The chmod command has the following options:

-R, --recursive: Changes the directories and files recursively
-v, --verbose: Displays a diagnostic report for every processed file
-c, --changes: Like verbose but displays only when there are actual changes
-f, --silent:Suppress error messages
--reference=RFILE: Use RFILE’s mode instead of MODE values

Permissions are granted as follows: a: All
o: Other
g: Group
r: Read
u: User
w: Write
x: Execute or run as a program

Techopedia Deals

Connect with us

Techopedia on Linkedin
Techopedia on Linkedin
"Techopedia" on Twitter

Sign up for Techopedia's Free Newsletter!

Email Newsletter

Join thousands of others with our weekly newsletter

Free Whitepaper: The Path to Hybrid Cloud
Free Whitepaper: The Path to Hybrid Cloud:
The Path to Hybrid Cloud: Intelligent Bursting To Amazon Web Services & Microsoft Azure
Free E-Book: Public Cloud Guide
Free E-Book: Public Cloud Guide:
This white paper is for leaders of Operations, Engineering, or Infrastructure teams who are creating or executing an IT roadmap.
Free Tool: Virtual Health Monitor
Free Tool: Virtual Health Monitor:
Virtual Health Monitor is a free virtualization monitoring and reporting tool for VMware, Hyper-V, RHEV, and XenServer environments.
Free 30 Day Trial – Turbonomic
Free 30 Day Trial – Turbonomic:
Turbonomic delivers an autonomic platform where virtual and cloud environments self-manage in real-time to assure application performance.