Browsing articles in "Operating System"
Apr
14
2014

Ubuntu – OpenSSL Heartbeat Extension (Heart bleed bug)

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The Heartbleed OpenSSL bug is unlike virtually any Internet-based security threat you’ve probably ever heard of. It’s not a virus that’s specific to one operating system or type of device. Since it revolves around a flaw in the method of encryption used by many of the world’s websites, this problem potentially affects almost everyone who uses the Internet, including people who operate servers that run Ubuntu Linux, the free, open-source operating system.

Jan
5
2014

A benchmark tools for Ubuntu – Phoronix test suite

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The most complete benchmarking software is probably Phoronix test suite, which is available in the repositories and can be installed with: sudo apt-get install phoronix-test-suite When running phoronix-test-suite for the first time in terminal, you can either answer yes or no to the questions regarding anonymous statistical reporting. If you answer yes, it says that This information is pooled along with the submissions from all other users to show general trends and other details on OpenBenchmarking.org. It is […]

Aug
3
2013

Mac OS X Dock, Finder, Spaces, Menubar are not responded

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Sometimes it just seems to happen, you’re getting the spinning beachball on Mac OS X System Applications/Tools, like the Finder when connecting to a messed up network share. Luckily, most of the time it’s easy (yet annoying) to fix via starting the Terminal and using following commands (beware, the names of the programs to kill are case sensitive!): The Finder crashed: killall -KILL Finder (you can also restart the Finder by option (=alt) + rightclicking […]

Jul
20
2013

How to Install Linux, Apache, MySQL, PHP on Ubuntu

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Step One—Install Apache Apache is a free open source software which runs over 50% of the world’s web servers. To install apache, open terminal and type in these commands: sudo apt-get update sudo apt-get install apache2 That’s it. To check if Apache is installed, direct your browser to your server’s IP address (eg. http://12.34.56.789). The page should display the words “It works!” like this. How to Find your Server’s IP address You can run the following […]

Jul
18
2013

Linux command line : What does it mean 2>&1

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For example  #ls 2>&1 > ls.log What is actually mean by 2>&1?? Since every shell process has there own descriptor :: 0 (stdin), 1 (stdout) and 2 (stderr) :: and & in the front of &1 indicated that 1 is not a file or folder, it is a descriptor. The > mean redirect the out put to another descriptors or  files. in this case 2>&1 > ls.log means that stderr(2) and stdout(1) put is redirected to the ls.log file. normally, for example #ls […]

Jul
16
2013

Fix QuickTime crash on launch in Mac OSX

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Process:         QuickTime Player [16463] Path:            /Applications/QuickTime Player.app/Contents/MacOS/QuickTime Player Identifier:      com.apple.QuickTimePlayerX Version:         10.2 (603.12) Build Info:      QuickTimePlayerX-603012000000000~1 Code Type:       X86-64 (Native)Parent Process:  launchd [137] User ID:         501     Date/Time:       2013-06-02 14:28:05.861 +0400 OS Version:      Mac OS X 10.8.3 (12D78) Report Version:  10   Interval Since Last Report:          13526 sec Crashes Since Last Report:           4 Per-App Interval Since Last Report:  43 sec Per-App Crashes Since Last Report:   4 Anonymous UUID:                      F04F6ADA-5B29-6015-7594-EAAF73E4879A     Crashed Thread:  7  […]

Feb
27
2013

SFTP on specific port and using rsa or dsa key

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sftp -oPort=2222 sftp -oIdentityFile=/path/to/private/keyfile user@123.456.789.012:/home/something Note: The -oPort=???? has to be before the user@123……

Feb
18
2013

HowTo: force umount a busy device in linux

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When you try to umount the regular way, if a device is busy you’ll get the following : dev:/# umount /dev/sda1 umount2: Device or resource busy umount: /boot: device is busy This can be solver very easy by entering this : dev:/# umount -l /dev/sda1

Feb
8
2013

How to Install and Configure Dropbox on Ubuntu Server

Dropbox is a file hosting service that offers cloud storage, file synchronization, and client software. In brief, Dropbox allows users to create a special folder on each of their computers, which Dropbox then synchronises so that it appears to be the same folder (with the same contents) regardless of the computer it is viewed on. In this tutorial, I will try to show you the steps to make dropbox features and services available on ubuntu […]

Dec
19
2012

Optimizing – MacOS X Lion for Non Mac SSD

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DISCLAIMER: Applying any of these tweakss is at your own risk. Make sure you back up your computer before trying any of these. Don’t run benchmarks on your new SSD Use Trim Enabler Turn off local Time Machine snapshots [laptops only] Turn off hibernation [laptops only] Set noatime flag Move user home directories to HDD [SSD+HDD only] Use RAM disk or HDD for temporary files Turn off sudden motion sensor [SSD+HDD only] Turn off hard […]

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