Articles

On an Acer PC, after installing any Linux system with any bootloader, I can boot it once, but after a reboot the UEFI Linux entry is gone. The Linux system’s file in … Why does Linux’s UEFI entry disappear at each boot?Read more

I have downloaded and installed the newest virtualbox 4.3.20 for my Windows 7 (64-bit OS), but when I want to install 64-bit Linux, the New->Create Virtual Machine only displays 32-bit option, no … Why does virtualbox only have 32-bit option, no 64-bit option on Windows 7?Read more

It annoys me having used Unix in college and now working on the Windows side. What’s the history behind this decision? Anyone know why it worked out this way? Solution: Unix introduced … Why does Windows use backslashes for paths and Unix forward slashes?Read more

I am having a problem with Hibernating my Windows 7 PC. When ever I try to hibernate, the screen goes blank for a while, there’s disk activity and then I am presented … Why doesn’t Hibernate work any more (Windows 7)?Read more

For one reason or another, my Word suddenly decided to stay always on top of all other windows. This is terribly annoying. The odd thing is: of three documents I have open, … Why is my Microsoft Word window always on top of other windows?Read more

I am using the .NET Framework classes to get the IP addresses for my machine. Dns.GetHostAddresses(Dns.GetHostName()) I have a VirtualBox adapter which has both an IPv4 and IPv6 address. Using the .NET … Why is there a percent sign ‘%’ in the ipv6 address?Read more

When I pinged my mailserver from the command prompt using: telnet mail.mydomain.com 25 I got the error Telnet is not a recognized command. I looked for a workaround and then found that … Why isn’t Telnet enabled by default in Windows 7?Read more

I am using Red Hat Linux Enterprise version 5. I’ve noticed people sometimes running commands with a couple of & options. For example, in the below command, there are two & signs. … Why run a Linux shell command with ‘&’?Read more

What is different about the way Windows runs an executable and Linux runs an executable? Why did they have to be different? Besides, why don’t Linux executables have a file extension? I’m … Why won’t Windows EXE files work on Linux?Read more

Why does Nmap report “Host seems down” when a simple ping succeeds? me@computer:~$ ping 123.45.67.89PING 123.45.67.89 (123.45.67.89) 56(84) bytes of data.64 bytes from 123.45.67.89: icmp_req=1 ttl=45 time=91.1 ms64 bytes from 123.45.67.89: icmp_req=2 … Why would ping succeed but nmap fail?Read more