bzgrep

Additional Notes

bzgrep searches bzip2-compressed files without manually decompressing them first. It behaves like a wrapper around grep that decompresses input as it searches.

Use it for compressed logs, reports, and text files ending in .bz2.

Syntax

bzgrep [grep-options] pattern file.bz2...

Parameters

• pattern: Text or regular expression to search for.
• file.bz2: Compressed file to search.
• grep-options: Common grep flags such as -i, -n, or -E.

Common Options

• -i: Case-insensitive search.
• -n: Show line numbers.
• -v: Invert the match.
• -E: Use extended regular expressions.
• -l: Show only filenames with matches.

Examples

bzgrep "error" access.log.bz2

Search a compressed log file.

bzgrep -in "failed" *.bz2

Search case-insensitively and show line numbers.

bzgrep -l "root" /var/log/*.bz2

Print only compressed files containing the pattern.

Practical Notes

• bzgrep is best for text data compressed with bzip2.
• For gzip files, use zgrep.
• Very large compressed files still take time because they must be decompressed while searching.