freshclam --version (return code: 0)
ClamAV 0.99.2
freshclam -h (return code: 0)
Clam AntiVirus: freshclam 0.99.2
By The ClamAV Team: http://www.clamav.net/about.html#credits
(C) 2007-2015 Cisco Systems, Inc.
--help -h show help
--version -V print version number and exit
--verbose -v be verbose
--debug enable debug messages
--quiet only output error messages
--no-warnings don't print and log warnings
--stdout write to stdout instead of stderr
--show-progress show download progress percentage
--config-file=FILE read configuration from FILE.
--log=FILE -l FILE log into FILE
--daemon -d run in daemon mode
--pid=FILE -p FILE save daemon's pid in FILE
--user=USER -u USER run as USER
--no-dns force old non-DNS verification method
--checks=#n -c #n number of checks per day, 1 <= n <= 50
--datadir=DIRECTORY download new databases into DIRECTORY
--daemon-notify[=/path/clamd.conf] send RELOAD command to clamd
--local-address=IP -a IP bind to IP for HTTP downloads
--on-update-execute=COMMAND execute COMMAND after successful update
--on-error-execute=COMMAND execute COMMAND if errors occured
--on-outdated-execute=COMMAND execute COMMAND when software is outdated
--list-mirrors print mirrors from mirrors.dat
--enable-stats enable statistical information reporting
--stats-host-id=UUID HostID in the form of an UUID to use when submitting statistical information
--update-db=DBNAME only update database DBNAME