How To Install Clam Antivirus On Cent OS 5

sumber : http://www.ravisaive.in/2011/07/how-to-install-clam-antivirus-on-cent.html

ClamAV is an open source (GPL) antivirus engine designed for detecting Trojans, viruses, malware and other malicious threats. It is the de facto standard for mail gateway scanning. It provides a high performance mutli-threaded scanning daemon, command line utilities for on demand file scanning, and an intelligent tool for automatic signature updates. The core ClamAV library provides numerous file format detection mechanisms, file unpacking support, archive support, and multiple signature languages for detecting threats.

Download and Install Clam Antivirus on Cent OS 5

1. We use RPMForge repo to install Clam Antivirus with using YUM command below.

[root@ravisaive ~]# yum install clamd

2. After Sucessfull installation start the clamd service by using below command.

[root@ravisaive ~]# /etc/init.d/clamd start
Starting Clam AntiVirus Daemon: Bytecode: Security mode set to "TrustSigned".
LibClamAV Warning: **************************************************
LibClamAV Warning: ***  The virus database is older than 7 days!  ***
LibClamAV Warning: ***   Please update it as soon as possible.    ***
LibClamAV Warning: **************************************************
                                                          [  OK  ]

3. If you get error similar to below shown while starting ClamAv Service. Then follow our solution below to fix this error.

[root@ravisaive]# /etc/init.d/clamd start
Starting Clam AntiVirus Daemon: ERROR: Can't open /var/log/clamav/clamd.log in append mode (check permissions!).
ERROR: Can't initialize the internal logger
                                                          [FAILED]

4. To fix this error you must set the owner and group to clamav to the file /var/log/clamav/clamd.log. here is the below command to set.

[root@ravisaive]# chown clamav:clamav /var/log/clamav/clamd.log

5. Then try to start the service again with below command.

[root@ravisaive]# /etc/init.d/clamd start
Starting Clam AntiVirus Daemon: Bytecode: Security mode set to "TrustSigned".
LibClamAV Warning: **************************************************
LibClamAV Warning: ***  The virus database is older than 7 days!  ***
LibClamAV Warning: ***   Please update it as soon as possible.    ***
LibClamAV Warning: **************************************************
                                                           [  OK  ]

6. Now update Clam Virus Database by using below command, It will download latest ClamAV update. If you get same permission error like above then set the owner and group as clamav to the file /var/log/clamav/freshclam.log with chown command as shown below.

[root@ravisaive]# chown clamav:clamav /var/log/clamav/freshclam.log
[root@ravisaive ~]# freshclam

7. Now test and Scan Clam Antivurs with below command to see results.

[root@ravisaive ~]# clamscan
LibClamAV Warning: ******************************************************
LibClamAV Warning: ***      Virus database timestamp in the future!   ***
LibClamAV Warning: ***  Please check the timezone and clock settings  ***
LibClamAV Warning: ******************************************************
/root/install.log.syslog: OK
/root/.bash_profile: OK
/root/anaconda-ks.cfg: OK
/root/.bash_logout: OK
/root/.tcshrc: OK
/root/.dmrc: OK
/root/.bash_history: OK
/root/.bashrc: OK
/root/.cshrc: OK
/root/install.log: OK

----------- SCAN SUMMARY -----------
Known viruses: 1000080
Engine version: 0.97.1
Scanned directories: 1
Scanned files: 10
Infected files: 0
Data scanned: 0.05 MB
Data read: 0.02 MB (ratio 2.00:1)
Time: 3.765 sec (0 m 3 s)