Now I have two bonus examples of grep command in unix: 11) grep command in UNIX can show matching patter in color which is quite useful to highlight the matching section , to see matching pattern in color use below command.
grep Exception today.log --color
12) at last there are three version of grep command in UNIX `grep, fgrep, egrep'. `fgrep' stands for Fixed `grep', `egrep' Extended `grep‘ use it based on your need.