http://git.savannah.gnu.org/cgit/grep.git/commit/?id=b639643840ef506594b6c46e5b24d9980a33e78e
CentOS Linux release 7.4.1708 (Core)
$ more /etc/redhat-release CentOS Linux release 7.4.1708 (Core)
egrep
$ more /usr/bin/egrep #!/bin/sh grep=grep unset _EXECOPT _GREPOPT case $0 in */*) dir=${0%/*} if test -x "$dir/grep"; then PATH=$dir:$PATH grep=grep fi;; esac if [ "$GREP_LEGACY_EGREP_FGREP_PS" = 1 ]; then _EXECOPT="-a egrep" else _GREPOPT=-E fi exec $_EXECOPT $grep $_GREPOPT "$@"
fgrep
$ more /usr/bin/fgrep #!/bin/sh grep=grep unset _EXECOPT _GREPOPT case $0 in */*) dir=${0%/*} if test -x "$dir/grep"; then PATH=$dir:$PATH grep=grep fi;; esac if [ "$GREP_LEGACY_EGREP_FGREP_PS" = 1 ]; then _EXECOPT="-a fgrep" else _GREPOPT=-F fi exec $_EXECOPT $grep $_GREPOPT "$@"
Ubuntu 16.04.3 LTS
@DESKTOP-J46UVNU:/mnt/c/Windows/System32$ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 16.04.3 LTS Release: 16.04 Codename: xenial
egrep
@DESKTOP-J46UVNU:/mnt/c/Windows/System32$ more /bin/egrep #!/bin/sh exec grep -E "$@"
fgrep
@DESKTOP-J46UVNU:/mnt/c/Windows/System32$ more /bin/fgrep #!/bin/sh exec grep -F "$@"
