Should be: $ sync && sync && sync && halt BTW, the 'sync;sync;sync' thing was a necessary command given, mosty during the late 70's and early 80's, to par

Should be: $ sync && sync && sync && halt BTW, the 'sync;sync;sync' thing was a necessary command given, mosty during the late 70's and early 80's, to park the tape head. Unix didn't have a 'rewind tape' command, so many manufacturers instead decided that three rapid syncs in a row meant 'rewind tape'. Disclaimer: had that muscle memory burned into me for decades, I still do it ...