Date
From DWIKI
Links
- https://www.cyberciti.biz/tips/linux-unix-get-yesterdays-tomorrows-date.html
- https://linuxconfig.org/addition-and-subtraction-arithmetics-with-linux-date-command
FAQ
Convert timestamp to readable
date -d '@1527153367'
Number of days to date
echo \(`date +%s -d 'Jul 3 09:48:30 2020 GMT'`-`date +%s`\)/86400|bc
