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8月 5 2021

CentOS7 安装Clamav 用于linux的病毒扫描

I, CentOS7 安装Clamav
安装依赖
yum -y install gcc-c++ pcre-devel zlib-devel openssl-devel llvm-devel libxml2 libxml2-devel libcurl-devel

解压编译安装
tar zxf clamav-0.102.1.tar.gz
cd clamav-0.102.1
./configure --prefix=/opt/clamav
或者有libcurl-devel报错情况下:
./configure --prefix=/opt/clamav --disable-clamonacc
make && make install

II, 修改配置文件
groupadd clamav
useradd clamav -s /sbin/nologin
mkdir /opt/clamav/logs
mkdir /opt/clamav/share/update
touch /opt/clamav/logs/{freshclam.log,clamd.log}
chown -R clamav:clamav /opt/clamav/logs
chown clamav.clamav /opt/clamav/share/update

cp /opt/clamav/etc/clamd.conf.sample /opt/clamav/etc/clamd.conf
修改: clamd.conf
Example 注释掉这一行
LogFile /opt/clamav/logs/clamd.log
PidFile /opt/clamav/updata/clamd.pid
DatabaseDirectory /opt/clamav/updata/

cp /opt/clamav/etc/freshclam.conf.sample /opt/clamav/etc/freshclam.conf
修改: freshclam.conf
Example 注释掉这一行
III, 下载或更新病毒库
wget http://database.clamav.net/main.cvd
wget http://database.clamav.net/daily.cvd
wget http://database.clamav.net/bytecode.cvd
可以一台下载之后再拷贝,下载的文件在 /opt/clamav/share/clamav 目录
更新数据库:
/opt/clamav/bin/freshclam

IV, 使用Clamav
常用方法:
## 扫描病毒
/opt/clamav/bin/clamscan -r --bell -i ${路径}
例如:
[root@centos7 clamav]# ./bin/clamscan -r --bell -i /home/
----------- SCAN SUMMARY -----------
Known viruses: 1234123 ## 病毒库
Engine version: 0.102.1 ## 引擎版本
Scanned directories: 2 ## 扫描的目录
Scanned files: 3 ## 扫描的文件
Infected files: 0 ## 感染的文件数
Data scanned: 0.00 MB ## 扫描文件的大小
Data read: 0.00 MB (ratio 0.00:1)
Time: 20.303 sec (0 m 20 s) ## 扫描花费的时间

## 扫描并清除
clamscan -r –remove ${路径}

## 扫描并移动病毒和感染文件到指定目录
clamscan -r --move=/home/bill/my_virus_collection ${路径}

#### clamscan -h 查看帮助
V, 安装脚本
#!/bin/bash
# USAGE: install clamav
### Install
yum -y install gcc-c++ pcre pcre-devel zlib zlib-devel openssl openssl-devel llvm-devel libxml2 libxml2-devel libcurl-devel
tar zxf clamav-0.102.1.tar.gz
cd clamav-0.102.1
./configure --prefix=/opt/clamav
make && make install

### Setting
groupadd clamav
useradd clamav -g clamav -s /sbin/nologin
mkdir /opt/clamav/logs
mkdir /opt/clamav/share/clamav
touch /opt/clamav/logs/freshclam.log
touch /opt/clamav/logs/clamd.log
chown -R clamav.clamav /opt/clamav/logs
chown clamav.clamav /opt/clamav/share/clamav

cp /opt/clamav/etc/clamd.conf.sample /opt/clamav/etc/clamd.conf
cp /opt/clamav/etc/freshclam.conf.sample /opt/clamav/etc/freshclam.conf

sed -i 's/^Example/\#Example/g' /opt/clamav/etc/freshclam.conf
sed -i 's/^Example/\#Example/g' /opt/clamav/etc/clamd.conf
sed -i 's/^#LogFile\ \/tmp\/clamd.log/LogFile\ \/opt\/clamav\/logs\/clamd.log/g' /opt/clamav/etc/clamd.conf
sed -i 's/^#PidFile\ \/var\/run\/clamd.pid/PidFile\ \/opt\/clamav\/updata\/clamd.pid/g' /opt/clamav/etc/clamd.conf
sed -i 's/^#DatabaseDirectory\ \/var\/lib\/clamav/DatabaseDirectory\ \/opt\/clamav\/updata/g' /opt/clamav/etc/clamd.conf

### 添加定时扫描任务
mkdir /tmp/virus_collection
echo "#scan virus" >>/etc/crontab
echo '30 4 5 * * /opt/clamav/bin/clamscan -r --move=/tmp/virus_collection / >/dev/null 2>&1' >>/etc/crontab

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