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12h
comment Is there any difference between computer speakers and a hi-fi?
This is off topic but, if you like a good sound, a good pair of earphone or headphone would be a much better way to get a good sound without spending a fortune. Unless you regularly held parties at your house, you probably don't need a speaker, and nobody cares about sound quality in a party anyway (it usually will be just too noisy to fully enjoy the sound, and if you play your sound loud enough to drown the buzzes, your neighbor will come knocking, unless you spend more money on soundproofing...).
Nov
22
revised Hibernating and booting into another OS: will my filesystems be corrupted?
added 1 character in body
Nov
21
answered Hibernating and booting into another OS: will my filesystems be corrupted?
Nov
18
awarded  Revival
Nov
17
answered Difference between the Windows and Linux thread scheduler
Nov
14
comment I have a 3.3Volt PCI ethernet card working on a 5Volt PCI slot. How is it possible?
Maybe the guy who did it read somewhere that the circuitry in the board is actually a universal one, but the card is sold without a cut for market segmentation?
Oct
31
comment How does a server get notified about the HTTP request?
Careful, "ping" has a different totally unrelated meaning in networking. Also, why has nobody mentioned "hardware interrupts"?
Oct
21
comment Do hard drives really have open cases now?
It's clearly a marketing decision. A fully enclosed hard drive would be simply a beige box and very hard to distinguish from other storage technologies like SSD, CD/DVD/BR Drive, etc. Showing a product shot with the cross section of the drives makes it easier to identify that the product is a hard disk without having to read the text (keep in mind that these stores may sell to people who don't know a single word of English).
Oct
13
comment Installing Linux on a laptop whose DVD drive and usb drives do not work
There are Linux flavors that can be installed simply by unzipping the files into a bootable partition (e.g. Gentoo can be installed this way), but you still need to be able to modify the boot record or install a bootloader (e.g. GRUB). Note Gentoo is not a beginner's system. Can you confirm whether or not you can modify the boot record? As a last resort you can set up GRUB to be chain loaded by Windows' NTLDR.
Oct
13
comment How does HTTP become stateless?
@skolima: on the other hand, statelessness is the reason why HTTP is the most scalable and reliable protocol in wide use. HTTP has always been explicitly designed for scalability rather than performance (yes, they're different thing), so if you think you need hard low latency than you are either using the wrong protocol or you are using the protocol incorrectly. While HTTP2 intends to improve performance, it does so in a way that remains true to statelessness. When used for what it's intended for, I had never seen statelessness being a bottleneck of a well designed HTTP application.
Oct
9
answered Does streaming use the same amount of bandwidth as downloading?
Sep
28
awarded  Yearling
Sep
6
answered Do POST beep codes also generate a numeric code for a POST test card?
Aug
22
comment ulimit not limiting memory usage
I knew that ulimit only work within the same bash shell for programs started after the limit is set (see how I started the program from my sample shell session), my question was that the limit still didn't work even after taking that into account.
Jul
16
awarded  Notable Question
Jul
4
comment Terminal: prefix previous command?
I can't remember whether it's Ctrl+A or Cmd+A, but this shortcut is what I usually use when I used to work on OS X. Note that Ctrl+A gets you to the start of the command like "Home" button and Ctrl+E gets you to the end of the command like "End" button. I'm usually hesitant to use !! especially in combination with sudo, in case it turns out that the previous command isn't what I thought it ought to be.
Jul
2
awarded  Curious
Jun
23
comment Is it safe to power on a motherboard outside of its case?
@stephenbayer: a case is useful for protecting those sensitive parts from the environment. A naked boards may much more easily get contact with liquid or conductive metals which is never good. So while it's not a problem to run a PC naked, given some basic precautions, a case is a good investment to protect those expensive parts.
Jun
22
comment Sudo vs root; any actual differences?
@dmanexe: sudo doesn't stand for superuser do, it's "switch user do". su and sudo can be used to switch to any users rather than just the superuser. Also there is nothing pseudo about sudo, you really get the actual root when running sudo not some faked anything. Note that the magic of sudo really comes from setuid permission bit.
May
24
comment How does virtualizing differ from emulation, in terms of structure?
@NothingsImpossible: unless you have a very old machine, most mainstream CPU sold nowadays supports hardware virtualization. Basic virtualization is always possible because the CPU will sent an interrupt to the supervisor (kernel) if any program (like a Guest OS) tries to execute instructions that aren't allowed in the current security level. All the Host OS got to do is to trap those interrupts, figure out the desired operation, and resume the execution of the child process. AMD-V/VT-x only enables a more efficient virtualization, as now the CPU itself can serve the "disallowed" instructions.