Super User Weekly Newsletter - Tuesday, December 30, 2014

Top new questions this week: How does Linux know that the new password is similar to the previous one? A few times I tried to change a user password on various Linux machines and when the new password was similar to the old one, the OS complained that they were too similar. I always wondered, how does ... linux unix security   asked by LeNoob 57 votes answered by slhck 78 votes Are IP addresses with and without leading zeroes the same? I have a security system and the network setting only allows a three-digit IP address. I can't set it to 192.168.2.100, instead I have to use 192.168.002.100. Are these two IP addresses different? Do ... networking ip   asked by Brock Vond 43 votes answered by AthomSfere 35 votes How to lock a file in Windows? Is there a way to lock a file with in-house means so it can't be deleted or overwritten? For testing of copy scripts I need to lock files temporarily to check the error handling in the scripts. Till ... windows-7 filesystems lock   asked by boboes 12 votes answered by Dan 16 votes How does Netflix know my password? Over the holidays, I was given a Chromecast. Neat! I finally can stream Netflix from my laptop to my much bigger screen'd television! Unfortunately, Chromecast seems to require Chrome extensions (I ... firefox passwords netflix   asked by Raven Dreamer 9 votes answered by Vinayak 28 votes Will the maximum speed of a network card reduce the impact of an incoming DDoS attack? I'm wondering if the maximum speed of a network card would reduce the chances of a DDoS affecting a home-hosted website. In this scenario, I'm hosting my website from an Android Tablet where the ... networking home-server denial-of-service   asked by TheJamaicanGuy 8 votes answered by JakeGould 12 votes How does a DNS lookup site get my location perfect? I was just visiting DNSleaktest.com and I found that it could find my location to my town. Most IP tracers think I'm about 30 miles away, saying I'm in Luton. So is it possible that it's just really ... networking dns   asked by Gaben Newil 6 votes answered by malakrsnaslava 0 votes Where shell functions are stored on Linux? At first I was looking for the reason of which doesn't output anything after giving it certain programs as an argument, e.g. cd. From what I've found here Why 'whereis' and 'which' ... linux bash shell-script   asked by Larry 5 votes answered by suspectus 5 votes Greatest hits from previous weeks: How can I display the contents of an environment variable from the command prompt in Windows 7? In Windows 7, when I start the Command prompt, is there any command to display the contents of an environment variable (such as the JAVA_HOME or PATH variables)? I have tried with echo $PATH, echo ... windows-7 windows command-line environment-variables   asked by Jonas 101 votes answered by RedGrittyBrick 117 votes Setting an animated .gif as the desktop background on Windows 7 I have an animated .gif I created using Photoshop CS4, but I can't get animation on my desktop although I can set it as a background from the context menu by opening it in Internet Explorer. How can ... windows-7 desktop-customization animated-gif   asked by blackjack 8 votes answered by harrymc 7 votes Can you answer these? Suspicious NetBios Name Service traffic A friend of mine recently complained about the very bad performance of the Internet connection over her family's LAN. Apparently the Internet connection worked normal most of the time but certain ... networking malware netbios network-traffic   asked by Mouagip 2 votes Desktop icon spacing changed after monitor replacement I just replaced my monitor with a TV Monitor of the same resolution and size (22" 1920x1080), but when I restarted Windows all the icons were in a different position. I was expecting this kind of ... windows-7 multiple-monitors taskbar icons   asked by mordack550 2 votes Exit /b 0 does not set %errorlevel% to 0 I have a weird behavior wrt setting errorlevel in a batch script to 0. I am calling a batch script a.bat on a Jenkins job, which in turn calls a second script b.cmd and evaluates the errorlevel after ... windows command-line batch jenkins windows-error-reporting   asked by Arne Mertz 1 vote

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