All Issues
24,993 verified issues
Are USB headphones/headsets inferior to regular ones?
Some headsets use an USB connection instead of connecting to the motherboard's regular audio output jack. Does that make them inferior in any way to other headsets? What about USB 2.0? I'm looking for any possible decrease in sound quality, voice quality, bandwidth, anything. I've been searching ar…
Where exactly L1, L2 and L3 Caches located in computer?
Where exactly L1, L2 and L3 Caches Located in computer ? I know, we use Cache to increase performance by picking DATA and INSTRUCTIONS from Cache rather than Main Memory. Following are my questions Where exactly L1 Cache located ? . is on the CPU chip ? Where exactly L2 Cache Located ? Where exactl…
Bash Shebang for dummies?
I have some bash scripts I have setup that mostly use but I regularly come across some that look like and so on. Can someone explain the meaning and benefits of these shebang options and whether they apply to other shebangs?
What is the difference between a directory and a folder?
Possible Duplicate: Directory vs. Folder Most people use the terms "folder" and "directory" interchangeably. Is there a difference, and if so, what is it?
ssh-copy-id does not work
I'm trying to set up a passwordless SSH login on CentOS 5.4: I generated RSA public key on the client. ssh-copy-id from client to server. Verified ~/.ssh/authorized_keys contains the client key. The client still prompted for password. What did I miss? Thanks. EDIT: checked ssh_config and permission…
How to disable the output of 7-Zip?
I use 7-Zip to compress files inside a batch file like this: I got the following output: Is it possible to disable this output (that is, I don't want anything to be printed)?
Using multiple keyboards with different keyboard layouts in Windows
I'd like to use multiple keyboards (all USB or one USB and one PS/2) with a different keyboard layout on each. Is this possible in Windows 7 or XP? I'd prefer to avoid a hardware-based solution if possible. My specific issue is that I prefer to use a Dvorak layout, but most of my colleagues use QWE…
bash: how to pass command line arguments containing special characters
I've written myself a linux program that needs a regular expression as input. I want to call the program in the shell and pass that regular expression as a command line argument to the program (there are also other command line arguments). A typical regular expression looks like Unfortunately the c…
Change Linux console screen blanking behavior
How do I change the screen blanking behavior on Linux virtual terminals? For example, if I switch to a VT from X, login, and leave the system alone for 5 minutes or so, the screen will blank like a screensaver. It comes back with any keypress, like a screensaver. Mostly I just want to change the ti…
SSH key asking me for a passphrase?
I have a public/private key pair. Neither of them have any sort of passphrase associated with them. Whenever I try to ssh using either the private or public(and I'm pretty sure I should only be using the public key), I get queried for a passphrase, and then of course can't connect up. Anyone have a…
How to start gVim maximized?
How to make gVim automatically maximize it's window when I open it? And a cross-plataform solution, I'm trying to use the same configs in a Linux and Windows machine... I've tried the hack , it almost works, but the window is not maximized, just resized and I lose some rows/columns.
unpack 'tar' but change directory name to extract to
I'd like to extract file and name to, folder2. Can this be done as a one-liner?
How do I check version of alpine mail client?
How do I check on a Unix server what version of the Alpine mail client is installed? I have root access in case that is needed.
Change spelling check language for a Document in Microsoft Word 2010
Usually I use to write English documents Now I'm editing a document of another language, and want to change the spelling check language of this document This change should not affect other documents (means does not saved by default) so I can work with English documents in the future Any clue? Thank…
How can I paste something at the end of the line in VIM?
How can I paste some text that I yanked at the end of the line? Currently I'm doing it by pressing $p. Is there any way to do this with a single keystroke?
How can I add additional search domains to the resolv.conf created by dhclient in CentOS
When my CentOS virtual machine boots it uses DHCP to get an IP address. It also overwrites resolv.conf with the DNS settings provided by the DHCP server. The DHCP server doesn't supply any search domains so I would like to get dhclient to put in a list of search domains when it writes it. How can I…
How to do Page-Up on a Mac in Terminal
The laptop has no page-up/down buttons. How can I have page-up/down on the terminal, e.g. when I edit with vi?
Extracting audio from MP4 video into MP3
I downloaded a few MP4-encoded videos from which I'd like to extract the audio stream into MP3 files for easy listening on my digital player. Most likely, VLC can do this, but the instructions followed on their forums gave out a "bubbly" sound file. Here are the files specifications: Audio mp4a 441…
Do SSDs get fragmented, and if they do, is that an issue?
Do solid-state drives get fragmented? And if they do, does it cause their performance to suffer?
Want to delete revisions from my SVN repository
The latest revisions in my code repo has been corrupted and has destabilized my app. I want to revert to an earlier revision. But I don't want to simply use 'revert' on my working copy; I actually want to delete my head revision and several revisions prior in my repo, thereby 'reverting' my repo to…