less command

Linux / Unix: Bash Shell See All Exported Variables and Functions

by on May 7, 2012 · 4 comments

How do I see a list of all exported variables and functions under Unix bash shell?

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Linux: Test If My Graphics Card Has OpenGL Support Or Not

by on August 23, 2009 · 7 comments

OpenGL (Open Graphics Library) is a standard specification defining a cross-language, cross-platform API for writing applications that produce 2D and 3D computer graphics. How can I test if my graphics card has OpenGL support under Linux?

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Linux: List / Display All Cron Jobs

by on July 7, 2009 · 2 comments

How do I view currently setup or all running cron jobs under Linux operating systems?

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Edit a File When You Are Viewing It Using more / less Command Pager

by on November 1, 2008 · 6 comments

I can use less or more pagers to view a file. How do I start an editor (such as vi or other text editor) to edit the current file without leaving the less or more pager command?

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Linux: Display rpm package architecture

by on September 11, 2007 · 1 comment

Q. I’m using CentOS on 64 bit Linux. How do I find out rpm package architecture before installation such as i386 or x86_64 bit? A. Almost each rpm package has i386 or x86_64 added to file extension. However some time you may see filename such as file-version.rpm. You can list all installed rpm packages with [...]

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