centos9(linux): 安装clamav

一，官方网站

https://www.clamav.net/

如图:

二，安装

1,开启epel仓库

[root@blog ~]# yum install -y epel-release

2,安装clamav

[root@blog ~]# yum install clamav

说明：病毒库数据较大，200多M，安装时需要等待较长时间

安装完成后查看clamav的版本:

[root@blog ~]# clamscan -V
ClamAV 1.0.6/27256/Thu Apr 25 16:27:19 2024

3, 安装病毒库升级命令:

[root@blog ~]# yum install clamav-freshclam

安装后查看freshclam版本:

[root@blog ~]# freshclam --version
ClamAV 1.0.6/27256/Thu Apr 25 16:27:19 2024

说明：1.0.6是程序版本

27256 是daily.cvd病毒库版本

三，使用

1,手动更新病毒库

[root@blog ~]# freshclam

freshclam 会显示当前的病毒库版本:

[root@blog ~]# freshclam
ClamAV update process started at Mon Aug 26 13:11:34 2024
daily.cvd database is up-to-date (version: 27378, sigs: 2065918, f-level: 90, builder: raynman)
main.cvd database is up-to-date (version: 62, sigs: 6647427, f-level: 90, builder: sigmgr)
bytecode.cvd database is up-to-date (version: 335, sigs: 86, f-level: 90, builder: raynman)

2，启动病毒库自动更新服务

查看状态

root@blog ~]# systemctl status clamav-freshclam.service
○ clamav-freshclam.service - ClamAV virus database updater
     Loaded: loaded (;;file://blog/usr/lib/systemd/system/clamav-freshclam.service/usr/lib/systemd/system/clamav-freshclam.service;;; 
     disabled; preset: disabled)
     Active: inactive (dead)
       Docs: ;;man:freshclam(1)man:freshclam(1);;
             ;;man:freshclam.conf(5)man:freshclam.conf(5);;
             ;;https://docs.clamav.net/https://docs.clamav.net/;;

启动服务:

[root@blog ~]# systemctl start clamav-freshclam.service 

3，手动查杀某个目录

[root@blog ~]# clamscan -r /var

4，定时查杀:把下面的命令放到crontab中即可

[root@blog ~]# clamscan --infected --recursive /home --move=/tmp/clamav -l /var/log/clamscan.log

--infected: 只打印被感染的文件
--recursive: 递归扫描子目录
--move=: 移动被感染文件到指定目录
-l /var/log/clamscan.log: 把结果保存到日志文件

 日志内容:

[root@blog ~]# more /var/log/clamscan_2024-08-26.log

-------------------------------------------------------------------------------


-------------------------------------------------------------------------------


----------- SCAN SUMMARY -----------
Known viruses: 8697733
Engine version: 1.0.6
Scanned directories: 653
Scanned files: 2648
Infected files: 0
Data scanned: 935.55 MB
Data read: 1362.55 MB (ratio 0.69:1)
Time: 150.350 sec (2 m 30 s)
Start Date: 2024:08:26 13:54:57
End Date:   2024:08:26 13:57:27

四，说明：

1，病毒库的存储位置:

默认所在目录:

[root@blog ~]# ll -h /var/lib/clamav/
total 224M
-rw-r--r-- 1 clamupdate clamupdate 283K Apr  8 07:58 bytecode.cvd
-rw-r--r-- 1 clamupdate clamupdate  62M Aug 26 12:54 daily.cvd
-rw-r--r-- 1 clamupdate clamupdate   69 Aug 26 12:52 freshclam.dat
-rw-r--r-- 1 clamupdate clamupdate 163M Sep 22  2021 main.cvd