Linux Commands Examples

A great documentation place for Linux commands


signature and database management tool

see also : freshclam


sigtool [options]

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Generate hex string from testfile and save it to testfile.hex:

cat testfile | sigtool --hex-dump > testfile.hex


sigtool can be used to generate MD5 checksums, convert data into hexadecimal format, list virus signatures and build/unpack/test/verify CVD databases and update scripts.


-h, --help

Output help information and exit.

-V, --version

Print version number and exit.


Be quiet - output only error messages.


Write all messages to stdout.


Read data from stdin and write hex string to stdout.

--md5 [FILES]

Generate MD5 checksum from stdin or MD5 sigs for FILES.

--sha1 [FILES]

Generate SHA1 checksum from stdin or SHA1 sigs for FILES.

--sha256 [FILES]

Generate SHA256 checksum from stdin or SHA256 sigs for FILES.

--mdb [FILES]

Generate .mdb signatures for FILES.


Create normalised HTML files comment.html, nocomment.html, and script.html in current working directory.


Decode UTF16 encoded data.


Extract VBA/Word6 macros from given MS Office document.


Extract Word6 macros from given MS Office document and display the corresponding hex values.

-i, --info

Print a CVD information and verify MD5 and a digital signature.

-b, --build

Build a CVD file. -s, --server is required.


ClamAV Signing Service address (for virus database maintainers only).


Use DIR as the default database directory for all operations.

--unpack=FILE, -u FILE

Unpack FILE (CVD) to a current directory.


Unpack a local CVD file (main or daily) to current directory.

--diff=OLD NEW, -d OLD NEW

Create a diff file for OLD and NEW CVDs/INCDIRs.

--run-cdiff=FILE, -r FILE

Execute update script FILE in current directory.

--verify-cdiff=FILE, -r FILE

Verify DIFF against CVD/INCDIR.

-l[FILE], --list-sigs[=FILE]

List all signature names from the local database directory (default) or from FILE.

-fREGEX, --find-sigs=REGEX

Find and display signatures from the local database directory which match the given REGEX. The whole signature body (name, hex string, etc.) is checked.

-fREGEX, --decode-sigs=REGEX

Decode signatures read from the standard input (eg. piped from --find-sigs)


Test all signatures from DATABASE against TARGET_FILE. This option will only give valid results if the target file is the final one (after unpacking, normalization, etc.) for which the signatures were created.


Please check the full documentation for credits.

see also

freshclam , freshclam.conf


Tomasz Kojm <tkojm[:at:]clamav[:dot:]net>

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