Freshclam

freshclam aktualisiert die ClamAV - Datenbank

Beschreibung

freshclam is a virus database update tool for ClamAV

Syntax

freshclam [options]

Optionen

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

Short	Long	Beschreibung
-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.
	--show-progress	Show download progress percentage.
	--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.
-F	--foreground	Don't fork into background (for use in daemon mode).
-u USER	--user USER	Run as USER. By default (when started by root) freshclam drops privileges and operates as the 'clamav' 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 'clamav' 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	--on-outdated-execute=COMMAND	Execute COMMAND when freshclam reports outdated version.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.
	--update-db=DBNAME	With this option you can limit updates to a subset of database files. The DB‐NAME 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 distributed through the ClamAV mirrors, your custom databases (specified with DatabaseCustomURL in freshclam.conf) will not be ignored.

Umgebungsvariablen

CURL_CA_BUNDLE

May be set to the path of a file (bundle) containing one or more CA certificates. This will override the default openssl certificate path. Note that the CURL_CA_BUNDLE environment variable is also used by the curl command line tool for the same purpose.

Exit-Status

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.

Status	Beschreibung
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 'clamav' user from /etc/passwd.
61	Can't drop privileges.
62	Can't initialize logger.

Konfiguration

Dateien

/usr/local/etc/freshclam.conf

Anwendung

Download database to default directory

# freshclam
Mon May 16 13:23:54 2022 -> ClamAV update process started at Mon May 16 13:23:54 2022
Mon May 16 13:23:56 2022 -> daily database available for update (local version: 26542, remote version: 26543)
Current database is 1 version behind.
Downloading database patch # 26543...
Time:    0.3s, ETA:    0.0s [========================>]    2.12KiB/2.12KiB
Mon May 16 13:23:56 2022 -> Testing database: '/var/lib/clamav/tmp.2f94ecd969/clamav-0c3b47c0377e3827944de16a4e3d3497.tmp-daily.cld' ...
Mon May 16 13:23:59 2022 -> Database test passed.
Mon May 16 13:23:59 2022 -> daily.cld updated (version: 26543, sigs: 1984431, f-level: 90, builder: raynman)
Mon May 16 13:23:59 2022 -> main.cld database is up-to-date (version: 62, sigs: 6647427, f-level: 90, builder: sigmgr)
Mon May 16 13:23:59 2022 -> bytecode.cld database is up-to-date (version: 333, sigs: 92, f-level: 63, builder: awillia2)
Mon May 16 13:23:59 2022 -> Clamd successfully notified about the update.

Download database to current directory

freshclam --datadir=.

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

freshclam -d -c 2

Links

Siehe auch

1. freshclam.conf(5)
2. clamd(8)
3. clamd.conf(5)
4. clamscan(1)

Testfragen

Testfrage 1

Antwort1

Testfrage 2

Antwort2

Testfrage 3

Antwort3

Testfrage 4

Antwort4

Testfrage 5

Antwort5