A linter for CSS code.

# To lint a single CSS file:
csslint <file.css>

# To lint multiple CSS files:
csslint <file1.css> <file2.css> <file3.css>

# To list all possible style rules:
csslint --list-rules

# To specify certain rules as errors (which result in a non-zero exit code):
csslint --errors=<errors,universal-selector,imports> <file.css>

# To specify certain rules as warnings:
csslint --warnings=<box-sizing,selector-max,floats> <file.css>

# To specify certain rules to completely ignore:
csslint --ignore=<ids,rules-count,shorthand> <file.css>