find patterns in files using extended regular expressions | egrep cheat-sheet

Find patterns in files using extended regular expression (supports ?, +, {}, (), and |).

Search for a pattern within a file:

egrep "search_pattern" path/to/file

Search for a pattern within multiple files:

egrep "search_pattern" path/to/file1 path/to/file2 ...

Search stdin for a pattern:

cat path/to/file | egrep search_pattern

Print file name and line number for each match:

egrep --with-filename --line-number "search_pattern" path/to/file

Search for a pattern in all files recursively in a directory, ignoring binary files:

egrep --recursive --binary-files=without-match "search_pattern" path/to/directory

Search for lines that do not match a pattern:

egrep --invert-match "search_pattern" path/to/file

For more information, the manpage for egrep: https://manned.org/egrep .

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