JavaScript tips

 I always put a '#' before a 'rm -rf' before clearing out old backups. I think a bit and then remove the '#' and then run the command. I once ran '/bin/rm -rf' as the user 'root' and deleted lots of files I wanted.  I even deleted the '/etc/passwd' file and got the famous 'you do not exist' error. I work as the user 'root' because my 'X Windows' system needs this. This is because I upgraded my Linux system myself 'from scratch' and did it slightly wrong.   I get a smiley '(:0)' next to my 'root' user's 'pseudo-terminal' when I run 'who' to show who is logged on

 Warnings from Chrome's Lighthouse turned out to be bugs from using an old version of Chrome used for Windows7. Lighthouse said: 'heading elements are not in a sequentially-descending order'. I can get round this by using the 'Lighthouse' option at 'webpagetest.org'. Or I can go to a neighbouring libary that runs Windows10 and the latest Chrome