#clamav安装与使用

 

###第一步：Clamav下载

http://www.clamav.net/downloads

wget http://www.clamav.net/downloads/production/clamav-0.99.2.tar.gz

###第二步：创建clamav用户和组

groupadd clamav (创建clamav组)

useradd -g clamav clamav(创建clamav用户并加入clamav组)

###第三步：编译安装

```shell

tar xfclamav-0.99.2.tar.gz

cd clamav-0.99.2

安装依赖包

yum install gcc openssl openssl-devel -y

./configure--prefix=/usr/local/clamav

make&&make install

```

###第四步：配置

```shell

mkdir /usr/local/clamav/logs #(日志存放目录)

touch /usr/local/clamav/logs/clamd.log

touch /usr/local/clamav/logs/freshclam.log

mkdir /usr/local/clamav/updata #(clanav 病毒库目录)

chown -R root.clamav /usr/local/clamav/

chown -R clamav.clamav /usr/local/clamav/updata/

chown clamav.clamav /usr/local/clamav/logs/clamd.log

chown clamav.clamav /usr/local/clamav/logs/freshclam.log

cd /usr/local/clamav/etc

cp clamd.conf.sample clamd.conf

cp freshclam.conf.sample freshclam.conf

vim clamd.conf

#Example 注释掉这一行.

LogFile /usr/local/clamav/logs/clamd.log

PidFile /usr/local/clamav/updata/clamd.pid

DatabaseDirectory /usr/local/clamav/updata

vim freshclam.conf

#Example 注释掉这一行.

DatabaseDirectory /usr/local/clamav/updata

UpdateLogFile /usr/local/clamav/logs/freshclam.log

PidFile /usr/local/clamav/updata/freshclam.pid

```

###第五步：升级病毒库

/usr/local/clamav/bin/freshclam

PS:这个过程很久，大概半个小时。确保网络正常

```shell

--help / -h show help

--version / -V print version number and exit

--verbose / -v be verbose

--debug enable debug messages

--quiet only output error messages

--no-warnings don't print and log warnings

--stdout write to stdout instead of stderr

--show-progress show download progress percentage

--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

--no-dns force old non-DNS verification method

--checks=#n / -c #n number of checks per day, 1 <= n <= 50

--datadir=DIRECTORY download new databases into DIRECTORY

--daemon-notify[=/path/clamd.conf] send RELOAD command to clamd

--local-address=IP / -a IP bind to IP for HTTP downloads

--on-update-execute=COMMAND execute COMMAND after successful update

--on-error-execute=COMMAND execute COMMAND if errors occured

--on-outdated-execute=COMMAND execute COMMAND when software is outdated

--list-mirrors print mirrors from mirrors.dat

--enable-stats enable statistical information reporting

--stats-host-id=UUID HostID in the form of an UUID to use when submitting statistical information

--update-db=DBNAME only update database DBNAME

```

 

###第六步：杀毒

/usr/local/clamav/bin/clamscan -r --remove (查杀当前目录并删除感染的文件)

/usr/local/clamav/bin/clamscan -r --bell -i / （扫描所有文件并且显示有问题的文件的扫描结果）

>其他参数

>```shell

> -r/--recursive[=yes/no] 所有文件

>　　--log=FILE/-l FILE  增加扫描报告

>　　# clamscan -l /var/log/clamscan.log /

>　　--move [路径] 移动病毒文件至..

>　　--remove [路径] 删除病毒文件

>　　--quiet 只输出错误消息

>　　--infected/-i 只输出感染文件

>　　--suppress-ok-results/-o 跳过扫描OK的文件

>　　--bell 扫描到病毒文件发出警报声音

>　　--unzip(unrar) 解压压缩文件扫描

>```

###第七步：计划任务

实际生产环境应用

一般使用计划任务，让服务器每天晚上定时跟新和定时杀毒。保存杀毒日志，我的crontab文件如下

16 4 * * * /usr/local/clamav/bin/freshclam

16 5 * * * /usr/local/clamav/bin/clamscan --infected -r / --remove -l /var/log/clamscan.log

 

 

>返回值

>0 : 无病毒

>1 : 发现病毒

>40: 已经通过的未知选项

>50: 数据库初始化错误

>52: 不支持的文件格式

>53: 无法打开目录

>54: 不能打开文件(ofm)

>55: 读文件错误(ofm)

>56: Can't stat input file / directory.

>57: Can't get absolute path name of current working directory.

>58: I/O 错误, 请检查文件系统

>59: 无法在/etc/passwd获得当前用户的信息

>60: 无法在/etc/passwd获得'clamav'（默认名）用户的信息

>61: Can't fork.

>63: 不能创建临时文件/目录(检查权限).

>64: 无法对临时目录进行写操作 (请指定另一个目录).

>70: 无法分配或释放内存 (calloc).

>71: 无法分配内存 (malloc).

 

 

```shell

NOTE:

Problem:

"Update failed. Your network may be down or none of the mirrors listed in /usr/local/etc/freshclam.conf is working. Check http://www.clamav.net/doc/mirrors-faq.html for possible reasons."

Resolve:

from freshclam.conf file find the line

#DatabaseMirror db.XY.clamav.net and uncomment it out to

DatabaseMirror db.us.clamav.net

#or DatabaseMirror db.ac.clamav.net