Useful tips for everyday
When does a PWM signal go high what happens? The output signal goes high when the modulating sine wave goes higher than the peak of…
How do you run curls in parallel? Run parallel requests using the xargs command $ echo ‘Africa Asia Europe America’ | xargs mkdir. $ curl…
How do you match up rows in Excel? To sort rows to match another column, here is a formula can help you. Select a blank…
How do I know if Xserver is running? If you want to check whether x11 is installed, run dpkg -l | grep xorg . If…
What are the limits of computational problem solving? Hardware limits or physical limits The Bekenstein bound limits the amount of information that can be stored…
Can you emulate a Raspberry Pi on a PC? Emulate a Raspberry Pi on Windows With QEMU Virtual machine utilities like VMware and VirtualBox create…
Which folders should I backup Ubuntu? Under most circumstances you want to backup these: /home/ for user data and configuration. /etc/ for system wide configuration…
How long does DNS propagation really take? DNS Propagation Time There’s no concrete answer for this, but typically DNS propagates within a few hours, though…
How do I keep text color in Excel? Change the color of text Select the cell or range of cells that has the data you…
How do you permanently delete iPhone messages? The safest, easiest, and fastest way of getting rid of messages from your iPhone is to simply delete…