# chkrootkit > Scan system for rootkits. > More information: . - Enable [q]uiet mode and suppress normal test results: `chkrootkit -q` - Enable e[x]pert mode and produce additional outputs: `chkrootkit -x` - Enable [d]ebug mode to show all output: `chkrootkit -d` - Specify [e]xcluded files for some tests: `chkrootkit -e "{{path/to/file}}"` - Specify a directory as the [r]oot for testing (e.g. mounted `ext` drives): `chkrootkit -r {{path/to/directory}}` - Ignore [n]fs-mounted directories: `chkrootkit -n` - Invoke [T]ests and ignore specific filesystem types: `chkrootkit -T {{filesystemtype}}` - Generate [l]ist of available tests: `chkrootkit -l`