find replace update mysql table field
michael UPDATE db_name SET filename = REPLACE(filename, ’_JPG’, ’.JPG’) WHERE 1;
Manage Wi-Fi with Terminal commands on OS X
detailed tech: How to manage Wi-Fi with Terminal commands on OS X updated with new ln -s location for newer OS https://apple.stackexchange.com/questions/81221/how-do-i-get-wi-fi-info-from-within-terminal
ffmpeg best quality merge
youtube-dl -f ’bestvideo+bestaudio/bestvideo+bestaudio’ –merge-output-format mp4 “link to youtube video”