The snippet library.
Small, practical examples. Search by task or narrow things down below.
Branch on whether a pattern exists
Linux Commands: Use grep -q in a conditional so an ordinary no-match result is not an unhandled failure.
Linux Commands✓ Tested
Count matching lines
Linux Commands: Use grep -c to count matching lines rather than individual occurrences.
Linux Commands✓ Tested
Exclude matching lines
Linux Commands: Use grep -v to retain lines that do not start with a comment marker.
Linux Commands✓ Tested
List files containing a match
Linux Commands: Use grep -l when only the matching filenames are needed.
Linux Commands✓ Tested
Match a whole word
Linux Commands: Use grep -w to exclude a matching substring inside a longer word.
Linux Commands✓ Tested
Match any pattern from a file
Linux Commands: Use grep -F -f with one literal pattern per line.
Linux Commands✓ Tested
Print only the matching portions
Linux Commands: Use extended regex and -o to extract digit sequences.
Linux Commands✓ Tested
Search for a literal string
Linux Commands: Use grep -F when the pattern contains regex metacharacters that should be literal.
Linux Commands✓ Tested
Search text without case sensitivity
Linux Commands: Use grep -i to match uppercase and lowercase variants.
Linux Commands✓ Tested
Show line numbers beside matches
Linux Commands: Use grep -n so a result identifies its position in the source file.
Linux Commands✓ Tested