信息来源： 中国Linux公社论坛
linux下免费的防毒软件可真是少，不过工夫不负有心人，还是让我找到了一个。
clam antivirus 官方网站：
http://clamav.sourceforge.net/
我用的是red hat as 3.所以我就下载了rpm包来装：
http://crash.fce.vutbr.cz/crash- ... mav-0.70-1.i386.rpm
安装好了以后，就可以用了。
启动 clamd进程就可以及时防病毒了。
更新病毒用：freshclam
-bash-2.05b# freshclam --help
Clam AntiVirus: freshclam 0.70
(C) 2002 - 2004 Tomasz Kojm <
tkojm@clamav.net>
--help -h show help
--version -V print version number and exit
--verbose -v be verbose
--debug enable debug messages
--quiet be quiet, output only error messages
--stdout write to stdout instead of stderr
(this help is always written to stdout)
--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
--checks=#n -c #n number of checks per day, 1 <= n <= 50
--datadir=DIRECTORY download new databases into DIRECTORY
--daemon-notify[=/path/clamav.conf] send RELOAD command to clamd
--on-update-execute=COMMAND execute COMMAND after successful update
--on-error-execute=COMMAND execute COMMAND if errors occured
-bash-2.05b# freshclam
ClamAV update process started at Wed Apr 28 09:45:31 2004
Reading CVD header (main.cvd): OK
main.cvd is up to date (version: 22, sigs: 20229, f-level: 1, builder: tkojm)
Reading CVD header (daily.cvd): OK
Downloading daily.cvd
daily.cvd updated (version: 287, sigs: 1047, f-level: 2, builder: tomek)
Database updated (21276 signatures) from database.clamav.net (212.113.16.74).
Clamd successfully notified about the update.
扫描病毒
-bash-2.05b# clamscan －r /root
/root/.viminfo: OK
/root/.bash_history: OK
/root/CFOLibrary.dll: OK
/root/#*mail*#25848DT2#: OK
/root/.Xauthority: OK
----------- SCAN SUMMARY -----------
Known viruses: 21276
Scanned directories: 1
Scanned files: 5
Infected files: 0
Data scanned: 0.08 MB
I/O buffer size: 131072 bytes
Time: 0.749 sec (0 m 0 s)
以上就是简短说明，更详细的就看看官方的文档吧！！
