fix: egrep and fgrep commands have been deprecated since 2007

[shamilbi]

https://news.slashdot.org/story/22/09/05/0135254/ The egrep and fgrep commands have been deprecated since 2007. Beginning with GNU Grep 3.8 today, calling these commands will now issue a warning to the user that instead they should use grep -E and grep -F, respectively