Useful tips for everyday
Was ww2 an enigma? The Enigma machine is a cipher device developed and used in the early- to mid-20th century to protect commercial, diplomatic, and…
How often is cron D run? In /etc/anacrontab, run‑parts is used to run cron. daily 5 minutes after anacron is started, and cron. weekly after…
How do I find the owner of a table in PostgreSQL? select tablename, tableowner from pg_catalog. pg_tables where schemaname = ‘public’ ; All of the…
Why is newgrp asking for a password? newgrp is a vestigial command from the days when the kernel would only keep track of one group…
How do you write reliability in a report? Writing a reliability report requires you to describe how you tested the product’s reliability, as well as…
Are there battery powered sump pumps? Battery backup sump pumps run on 12-volt, acid-free batteries. Some manufacturers recommend a battery that’s marine rated, which means…
What is the minimum sample size for Chi-Square test? Most recommend that chi-square not be used if the sample size is less than 50, or…
How do I reset my ultrasonic sensor? Factory Reset; 1. Press and hold teach button 1 (14-19 seconds) until the LED’s are flashing green/yellow at…
How to connect POIs to a road network? Now, unlike snapping, we need to generate a “projected access point (PAP)” for each external node. These…
How do you approach an algorithm problem? Be Strategic, Think First Analyze the problem. Restate the problem. Write out examples of input and output. Break…