A haiku about DNS

Posted on in Categories Humour last updated April 18, 2017

Here is a haiku (a Japanese poem) about DNS (“domain name system”):

It’s not DNS
There is a no way it’s DNS
It was DNS

Here is a postcard for your sysadmin friend whenever there is a DNS issue:

dns haiku
dns haiku

Humor: Binary Search Trees

Posted on in Categories Humour last updated April 18, 2017

Daughter: Dad, you know Binary Search Trees?

Dad: Say no more.

Binary Search Trees
Binary Search Trees (Pic credit)

Dad: *later* Now watch as I delete and re-balance!

Daughter: DAD, NOOOOO!

There is always xkcd for everything, so here is the one:

Xkcd - Binary trees
Xkcd – Binary trees

How to execute sudo without password?

Posted on in Categories Link last updated April 18, 2017

If you are the only sysadmin or developer, you can skip password when you run sudo command. By default, sudo asks for the password. Here is how you can run sudo without having to enter your password.

I’m a new Unix system user. How do I use sudo command without a password on a Linux or Unix-like systems? I log in as [email protected] and disabled root login for ssh. After login, I need to run some commands as root user. I am the only sysadmin using my server. How do I run or execute sudo command without a password for a user named Tom under Debian/Ubuntu/CentOS Linux cloud server?

How to run sudo command without a password on a Linux or Unix

How to enable Wake on Lan (WOL) with Advanced TomatoUSB wifi router firmware

Posted on in Categories Hardware, Howto, Networking, Open Source last updated March 29, 2017

I recently installed TomatoUSB advanced firmware on my Asus RT-AC66U wifi router. This router act as my wireless Ethernet bridge. TomatoUSB advanced has additional features like

  • SSH
  • Multiple WAN support (3G/4G/Static IP/Cable/ADSL2)
  • Tor
  • Virtual Wireless
  • DMZ
  • IPv6
  • FTP/Media server via USB
  • BiTorrent Client via USB
  • UPS support
  • OpenVPN client and server
  • Tinc VPN server and much more.