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고준
Lives in Seoul, Korea
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The best ebook reader app for Android...I've gone through dozens and FBreader is by far the best, almost like Calibre on Linux/Windows
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Issues with Terminator and GNU Screen
One of the first Linux distros I used was Crunchbang Linux based on Ubuntu 9.04. The default terminal was terminator , and I thought it was so cool how you could split terminal windows vertically and horizontally multiple times using the hotkeys C-S-o (hori...
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Some observations about glibc GHOST vulnerability patching in the field
I currently work as a Linux System Engineer for an OSS service company that provides manpower for various Managed Service Providers (MSP) that mostly serve the Korean telecom industry. I spend most of my days out of the office on service calls ranging from ...
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Reconfiguring multipath devices on a production system
About two weeks ago, I was working my way down a server health checklist during the 2am to 5am maintenance window on an early Tuesday morning. Among four application servers running RHEL 6.4, one of them showed an incorrect number of LUN's (Logical Unit Num...
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Archlinux: Temporary workaround for xinit failure after upgrading to xorg-xinit 1.3.4-2
After updating my Archlinux system running kernel 3.19.2-1 with pacman -Syyu X windows' xinit  refuses to start with the error " /dev/tty0 does not exist ". Instead of startx , I invoke XFCE4 DE from the CLI with  startxfce4 . On Arch, you can browse recent...
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mysql/mariadb supports utf-8 encoding within DB tables, but it doesn't support UTF-8 in /etc/my.cnf???
A few weeks ago, I installed RHEL 6.6 and MariaDB 10.X at a client site but had problems running a DB install script. The message I got was found option without preceding group in config file /etc/my.cnf at line 1 A google search for this snippet turned up ...
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Server Network Port Enumeration in RHEL5.X/6.X
Problem Let's say you have three network cards plugged into your server's PCI expansion slots as well as four LOM (LAN On Motherboard) ports. Let's assume further that the PCI network cards are made by Intel and use the igb driver for Gigabit Ethernet and t...
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ksvalidator - linter for kickstart automated install config files
Unattended installations with anaconda and Kickstart files are a must when installing RHEL/CentOS on multiple machines via PXE. One problem, however, is that you often don't know if you've made a typo or some syntax error within your Kickstart file until th...
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Linux/Unix text parsing with awk for spreadsheet data
I track some basic personal health data in a spreadsheet, and track things like time to bed, wakeup time, mealtimes, etc. Simple analysis (average, mean avg. deviation, etc.) is easy to do using built-in spreadsheet functions like AVERAGE() . For conditiona...
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glibc patch for non-LTS Ubuntu 12.10
A few weeks ago when the glibc 'ghost' vulnerability was announced, sysadmins and system engineers the world over frantically began patching systems. Although most of the servers my company manages have been patched by now, I got a weird request from a clie...
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Review of LFCS Ubuntu exam taken on Feb. 28 2015 (Fri)
I am proud to announce that I am now a Linux Foundation Certified Sysadmin ( LFCS-1500-0222-0100 , last name Koh ) . I took the exam on a VM with Ubuntu 14.04 installed and passed with a score of 86/100. Before March 1, 2015 the passing score was 65%, but a...
I am proud to announce that I am now a Linux Foundation Certified Sysadmin (LFCS-1500-0222-0100, last name Koh) . I took the exam on a VM with Ubuntu 14.04 installed and passed with a score of 86/100. Before March 1, 2015 the...
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+firemachima I will be taking the RHCSA on Fri 2015.03.27 Once I have taken the exam I plan to write another post about the differences between the LFCS and RHCSA. One big difference that I didn't mention in my original post is that the RHEL7 VM on the exam comes with Gnome Desktop installed! Some of the admin tasks you will be asked to accomplish are actually easier using the GUI (i.e. LDAP setup)...
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My first book translation is now in print! "Crossing Heaven's Border"
In Spring 2012, I was contacted by a South Korean newspaper reporter from The Chosun Ilbo about translating a book. As a freelance interpreter and translator from 2005-2014, I had done lots of one-off translations of thesis abstracts, short stories, ad copy...
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Have him in circles
90 people
Jason DeRose's profile photo
Kevin Ashcraft's profile photo
francisco “WEEJOOB” FRAZAO's profile photo
ed kim's profile photo
Jake Tolbert's profile photo
eunohk song's profile photo
Free Software Magazine's profile photo
Travis Randall's profile photo
Thanh Niên Việt Nam's profile photo
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Columbus, Jeju
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Linux System Engineer, programming enthusiast
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고준's +1's are the things they like, agree with, or want to recommend.
What UBC has learned about doing MOOCs | Tony Bates
www.tonybates.ca

Engle, W. (2104) UBC MOOC Pilot: Design and Delivery Vancouver BC: University of British Columbia. The University of British Columbia, a pre

Your visual how-to guide for SELinux policy enforcement | Opensource.com
opensource.com

Dan Walsh of Red Hat shares a visual how-to guide for SELinux policy enforcement.

Not So Spooky: Linux "Ghost" Vulnerability
blog.trendmicro.com

The recent GHOST vulnerability in Linux is difficult to exploit and has a limited attack surface.

The Cow Says, Have Fun! | Linux Journal
www.linuxjournal.com

Sometimes, when the clock hits 3:00am, and you've been in the server room since 9 o'clock the previous day, you start to get a little batty.

Computer Networking, TCP/IP Basics
xahlee.info

This page is a condensed intro to TCP/IP. It is written for programers or scientists who wants a quick understanding how TCP/IP works. In 2

Working with Stdin and Stdout | Linux Journal
www.linuxjournal.com

Previously, I erroneously titled my column as "SIGALRM Timers and Stdin Analysis". It turned out that by the time I'd finished writing it, I

Monitoring Android Traffic with Wireshark | Linux Journal
www.linuxjournal.com

The ubiquity and convenience of smartphones has been a real boon for getting information on the go. I love being able to jump on a Wi-Fi hot

Linux Foundation Certified System Administrator
training.linuxfoundation.org

Learn from the best with training from the Linux Foundation. Our comprehensive Linux training includes online, classroom, and corporate trai

Learn from the best with training from the Linux Foundation. Our ...
training.linuxfoundation.org

Learn from the best with training from the Linux Foundation. Our comprehensive Linux training includes online, classroom, and corporate trai

It Actually Is Rocket Science | Linux Journal
www.linuxjournal.com

I've never once made a model rocket. I've always wanted to, but apart from "tube with explodey rocket part", I really didn't know where to s

Google Noto Fonts
www.google.com

Beautiful and free fonts for all languages. Noto is Google’s font family that aims to support all the world’s languages. Its design goal is

The Indie Bubble Is Popping.
jeff-vogel.blogspot.com

Writing this article really stressed me out. I reworked it over a dozen times. To calm down a little, I will intersperse this with image tha

New holiday calendars
gmailblog.blogspot.com

Posted by Ronnie Falcon, Associate Product Manager Intern Interested in celebrating Carnival with your cousin in Argentina, or not sure when

Anubis, the God of Dead Bitcoin Miners | Linux Journal
www.linuxjournal.com

With the recent resurgence of Bitcoin and the subsequent vitality of other cryptocurrencies (Litecoin, for instance), I've been receiving lo

Download a copy of your Gmail and Google Calendar data
gmailblog.blogspot.com

Posted by Nick Piepmeier, Software Engineer Having access to your data and being able to take it with you is important, especially if that d