Metadata

ID: bash-code-quality/deprecated-egrep-fgrep

Language: Bash

Severity: Notice

Category: Code Style

Description

egrep and fgrep are legacy commands. They were deemed obsolescent by POSIX and removed from the standard. They are planned to be removed entirely in a future release.

Prefer grep -E for extended regular expressions and grep -F for fixed-string matching.

Non-Compliant Code Examples

#!/bin/bash
egrep 'pat' file.txt
fgrep needle haystack.txt
/usr/bin/egrep foo bar

Compliant Code Examples

#!/bin/bash
grep -E 'pat' file.txt
grep -F 'literal' file.txt
grep foo bar.txt
/bin/grep -E pat f

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