print lines begining with range of letters grep ^[A-D] table.txt
search for word which has any single character followed by ello grep ".ello" demo.txt
OR, all the below examples produce the same results grep "stuff|more" demo.txt
grep -E "stuff|more" demo.txt
grep -e "stuff" -e "more" demo.txt
AND, there is no AND so regex works grep 'Manager.*Sales' employee.txt
grep 'Manager.Sales|Developer Tech' employee.txt
begin with 1 and endswith C grep '^1.*C$' file.txt
print everything that doesn't contain the query grep -v ^Da* table.txt
-i forgets about case sensitivity grep -i ^DA table.txt
show only the matched string, not the entire line in which it is present within. grep -o "Meow" table.txt
print the file containing the query including thos within subdirs grep -r ^David ~/scripts-x14.04/bash/*
print the name of the file(s) which matches the query grep -l ^David ~/some_dir/*
count the number of matches grep -c "stuff" table.txt
show the line numbers of the matches grep -n "go" demo.txt
search only for the full word grep -w "of" table.txt
print 3 lines after the match (-B for before the match & -C for before and after) grep -A 3 "of" table.txt
print the number of occurrences + file name that string appears grep -RIci "string here" . | awk -v FS=":" -v OFS="\t" '$2>0 { print $2, $1 }' | sort -hr
