In a UNIX-based operating system, chmod (change mode) is a command used by a file owner or administrator to change the definition of access permissions to a file or set of files.
This was last updated in September 1999
Open source databases, Open source Web and application servers, Enterprise applications for Linux
Linux administration tools, Linux management and configuration, Linux interoperability, Linux licensing and support, Linux monitoring and troubleshooting, Introduction to Linux system administration
Linux enterprise desktop distributions, Linux enterprise desktop applications
Cloud computing on Linux, Linux high-performance computing and supercomputing, Linux server hardware, Linux virtualization, Linux backup and storage, Linux network administration, Open source projects in the cloud
Unix-to-Linux migration, Windows-to-Linux migration, Linux to Linux migration
Linux security risks and threats, Linux system security best practices, Linux security tools
Linux news and updates, Red Hat Enterprise Linux Server, SUSE Linux Enterprise Server, Ubuntu Server, Noncommercial Linux distributions, Oracle Enterprise Linux
Definition
In a UNIX-based operating system, chmod (change mode) is a command used by a file owner or administrator to change the definition of access permissions to a file or set of files.
Much of today’s business relies on smooth operation of Web servers. Explore these three open source tools to monitor performance, security and traffic on Apache Web servers.
Learn how to keep your Apache Web server secure by applying basic SELinux settings, including adjusting SELinux so Apache uses nondefault settings.
Red Hat Enterprise Linux 6 uses Postfix for mail transmission. Learn how to configure the open source mail server in your Linux system.
An addendum to the ASHRAE 90.1-2010 energy standard could ease energy efficiency requirements on anyone building or significantly expanding data centers in the U.S.
A well-timed mainframe database reorg can result in much improved response.
Point tools or management frameworks? Set realistic goals and criteria before choosing a systems management tool.
Hyper-V 3.0 will feature new resource-monitoring capabilities, which will be a boon for multi-tenant environments that need to calculate chargeback.
VMware pros, who are under pressure to complete their VCP 5 exam before Feb. 29 to avoid additional requirements, yearn for Microsoft-style exams.
Microsoft Hyper-V 3.0 will introduce PVLANs, a new feature that uses IP address virtualization to solve the network isolation shortcomings of VLANs.
IBM SmartCloud services give enterprises some options to build private and hybrid clouds and may give IBM a chance to improve its lagging cloud image.
Determining how to manage hybrid clouds can seem daunting. The trick is to identify what you need to manage and the best types of tools for the job.
Lining up cloud platforms from major vendors can cause vertigo. What’s the difference among private cloud products? Take a look at HP Cloud Services.
To fix your Windows memory management problems, you must first diagnose how memory is allocated. Certain Windows 7 Task Manager features can cure what ails your desktops.
Targeted malware attacks and social engineering schemes such as phishing and whaling pose a growing security threat because cybercriminals are getting help from unwitting users.
Enterprise desktop security involves many moving parts, but Group Policy settings can help. Use them to manage IE and Outlook, as well as Windows 7's Control Panel and UAC.