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freshclam

Section: Clam AntiVirus (1)
Updated: December 4, 2013
Index Return to Main Contents
 

NAME

freshclam - update virus databases  

SYNOPSIS

freshclam [options]  

DESCRIPTION

freshclam is a virus database update tool for ClamAV.  

OPTIONS

Freshclam reads its configuration from freshclam.conf. The settings can be overwritten with command line options.

-h, --help
Output help information and exit.
-V, --version
Print version number and exit.
-v, --verbose
Be verbose. This option causes freshclam to print much additional information.
--debug
Enable debug messages from LibClamAV.
--quiet
Be quiet - output only error messages.
--no-warnings
Don't print and log warnings.
--stdout
Write all messages to stdout.
--config-file=FILE
Read configuration from FILE.
-l FILE, --log=FILE
Log report to FILE.
-d, --daemon
Run in a daemon mode. Defaults to 12 checks per day unless otherwise specified by --checks or freshclam.conf.
-p FILE, --pid=FILE
Write daemon's pid to FILE.
-u USER, --user USER
Run as USER. By default (when started by root) freshclam drops privileges and operates as the '' user.
--no-dns
This option forces old non-DNS verification method (without a TTL delay).
-c #n, --checks=#n
Check #n times per day for a new database. #n must be between 1 and 50.
--datadir=DIRECTORY
Install new database in DIRECTORY. The directory must be writable for the '' user or unprivileged user running freshclam.
--daemon-notify=/path/to/clamd.conf
Notify the daemon about the new database. By default it reads a hardcoded config file but you can use a different one. Both local and TCP sockets are supported.
-a IP, --local-address=IP
Use (local) IP for HTTP downloads. Useful for multi-homed systems. If binding fails for whatever reason, a warning is issued and freshclam behaves like without this flag.
--on-update-execute=COMMAND
Execute COMMAND after successful update.
--on-error-execute=COMMAND
Execute COMMAND if error occurred. Remember, that virus database freshness is the most important thing in anti-virus system. With this option freshclam can alert you (eg. send SMS) when something is going wrong.
--on-outdated-execute=COMMAND
Execute COMMAND when freshclam reports outdated version. In the command string %v will be replaced by the new version number.
--list-mirrors
Print mirror details from mirrors.dat (cache file for the mirror manager).
--submit-stats[=/path/to/clamd.conf]
Upload detection statistics to the ClamAV Project (see freshclam.conf(5):SubmitDetectionStats for more details). No database update will be performed. This option only works in the interactive mode.
--update-db=DBNAME
With this option you can limit updates to a subset of database files. The DBNAME should be "main", "daily", "bytecode", "safebrowsing" or one of the 3rd party database names. This option can be used multiple times and only works with the official and 3rd party databases distrubuted through the ClamAV mirrors, your custom databases (specified with DatabaseCustomURL in freshclam.conf) will not be ignored.
--enable-stats
Enable submission of statistical data.
--stats-host-id=UUID
HostID in the form of an UUID to use when submitting statistical information.
 

EXAMPLES

(0) Download database to default directory:

freshclam

(1) Download database to current directory:

freshclam --datadir=.

(2) Run as a daemon and check 2 times per day for new database:

freshclam -d -c 2

 

RETURN CODES

Some return codes of freshclam can be overwritten with a built-in command EXIT_n which can be passed to --on-*-execute, eg. --on-update-execute=EXIT_1 will force freshclam to always return 1 after successful database update.
0 : Database is up-to-date or successfully updated.
40: Unknown option passed.
50: Can't change directory.
51: Can't check MD5 sum.
52: Connection (network) problem.
53: Can't unlink file.
54: MD5 or digital signature verification error.
55: Error reading file.
56: Config file error.
57: Can't create new file.
58: Can't read database from remote server.
59: Mirrors are not fully synchronized (try again later).
60: Can't get information about '' user from /etc/passwd.
61: Can't drop privileges.
62: Can't initialize logger.
 

FILES

/etc/freshclam.conf  

CREDITS

Please check the full documentation for credits.  

AUTHOR

Tomasz Kojm <tkojm@clamav.net>, Kevin Lin <klin@sourcefire.com>  

SEE ALSO

freshclam.conf(5), clamd(8), clamd.conf(5), clamscan(1)


 

Index

NAME
SYNOPSIS
DESCRIPTION
OPTIONS
EXAMPLES
RETURN CODES
FILES
CREDITS
AUTHOR
SEE ALSO


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