Text processing

Linux wc command

Count lines, words, and bytes. Use -l for a line count only.

Availability: Common Linux commands; shell built-ins and external implementations may differ by distribution.中文

Syntax

wc [OPTION]... [FILE]...

Examples

Count lines in a log file.

wc -l access.log

Count words in a text file.

wc -w README.md

Parameters, options and clauses

Option / clause	Description
`-l, --lines`	Print newline counts.
`-w, --words`	Print word counts.
`-c, --bytes`	Print byte counts.
`-m, --chars`	Print character counts.
`-L, --max-line-length`	Print the maximum line width.

Safety note

Review a command and its target before running it. Commands that alter files, services, accounts, disks, permissions or databases may be difficult to reverse. Test in a safe environment and keep backups.

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