Linux: Find Out How Much Disk Space Left On Hard Drive

by on June 9, 2013 · 3 comments

I am a desktop support professional with experience working in a corporate call center environment. Recently, I started to admin RHEL based IBM Linux server. How do I determine how much disk space left in my Linux server? How do I find out how much disk space I have in Linux for each partition?

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Linux: Find Out Directory Size Command

by on June 9, 2013 · 3 comments

I am a new Linux user. How do I find out size of a directory on Linux operating systems using command line options?

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Mac OS X: Wake Up Servers Using Wake-on-LAN ( WOL ) Command Utility

by on June 9, 2013 · 1 comment

I know how to send WOL command using Linux or FreeBSD wake command. But, how do I send Wake on LAN (WOL) frames to hosts on a local Ethernet network using Apple OS X operating systems to wake up my servers or nas devices?

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CentOS / RHEL: Check If A Service Is Running Or Not

by on June 9, 2013 · 3 comments

How do I find out if a service such as MySQL or Apache running on my Centos/RHEL/Fedora Linux server?

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Mac OS X: Install GCC Compiler with Xcode

by on June 9, 2013 · 1 comment

I have Mac OS X Mountain Lion. I need to compile a few apps and Perl modules. I already installed Xcode from app store but I’m unable to find gcc compiler or make command. How do I install gcc on Mac OS X 10.8.x?

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Debian 7 Wheezy: Install Flash Player

by on June 9, 2013 · 1 comment

I am a new Debian Linux version 7 user. I found out that Pandora player is not working due to Adobe flash player. How do I install and use flash player on Debian 7 with Firefox browser?

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sed Tip: Delete All Blank White Spaces

by on June 9, 2013 · 3 comments

I have a text file as follows:

foo
bar
foobar

How can I delete all leading and/or trailing blank spaces, tab from each line using sed command?

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