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系統rhel7.5
clamav-0.100.2.tar.gz 官網下載clamav：http://www.clamav.net
開始安裝：
根據自己的系統版本下載相應的epel安裝文件

#wget https://dl.fedoraproject.org/pub/epel/epel-release-latest-6.noarch.rpm
#wget https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
安裝epel:
rpm -ivh epel-release-latest-7.noarch.rpm
#yum install clamav clamav-server clamav-data clamav-update clamav-filesystem clamav-scanner-systemd clamav-devel clamav-lib clamav-server-systemd

這種方法安裝後，病毒庫默認地址是/var/lib/clamav
#tar zxvf clamav-0.99.2.tar.gz
#cd clamav-0.99.2
#要帶pcre，要不然執行clamscan會報錯
#./configure --prefix=/usr/local/clamav --with-pcre
#make
#make install
#cd /usr/local/clamav/etc/
#cp clamd.conf.sample clamd.conf
#cp freshclam.conf.sample freshclam.conf
註釋掉clamd.conf和freshclam.conf中的

Example 註釋掉這一行. 第8 行

useradd clamav -s /sbin/nologin

mkdir -p /usr/local/clamav/share/clamav

chown clamav:clamav /usr/local/clamav/share/clamav

二、更新病毒庫
#cd /usr/local/clamav/share/clamav
#wget http://database.clamav.net/main.cvd
#wget http://database.clamav.net/daily.cvd
#wget http://database.clamav.net/bytecode.cvd

chown clamav:clamav *

clamscan：

用clamscan掃描，不需要開始服務就能使用。速度慢，要帶-r，才會遞歸掃描子目錄
#clamscan -r /usr
這個命令不僅會顯示找到的病毒，正常的掃描文件也會顯示出來。

可以用下面這個命令，只顯示找到的病毒信息

clamscan --no-summary -ri /tmp

-r 遞歸掃描子目錄
-i 只顯示發現的病毒文件
--no-summary 不顯示統計信息
[root@huojin181 clamav]# clamscan /var/
LibClamAV Warning: **
LibClamAV Warning: The virus database is older than 7 days!
LibClamAV Warning: Please update it as soon as possible.
LibClamAV Warning: **
/var/run: Symbolic link
/var/lock: Symbolic link
/var/mail: Symbolic link
/var/.updated: OK

----------- SCAN SUMMARY -----------
Known viruses: 6668589
Engine version: 0.100.2
Scanned directories: 1
Scanned files: 1
Infected files: 0
Data scanned: 0.00 MB
Data read: 0.00 MB (ratio 0.00:1)
Time: 10.251 sec (0 m 10 s)

[root@huojin181 clamav]# clamscan --no-summary -ri /tmp
使用–remove選項，會直接刪除檢測出來的文件。
clamscan --remove /root

殺毒軟件clamav的安裝和使用