Clamav 病毒数据库不能更新

运行 freshclam 以更新病毒数据库
突然出现以下信息

WARNING: getpatch: Can't download daily-14528.cdiff from db.local.clamav.net
WARNING: getpatch: Can't download daily-14528.cdiff from db.local.clamav.net
WARNING: getpatch: Can't download daily-14528.cdiff from db.local.clamav.net
WARNING: getpatch: Can't download daily-14528.cdiff from db.local.clamav.net
WARNING: getpatch: Can't download daily-14528.cdiff from db.local.clamav.net
WARNING: Incremental update failed, trying to download daily.cvd
WARNING: Can't download daily.cvd from db.local.clamav.net

Trying again in 5 secs...

1) 查看

$ ls -al /var/lib/clamav

2) 下载病毒数据库

$ wget http://database.clamav.net/main.cvd
$ wget http://database.clamav.net/daily.cvd
$ wget http://database.clamav.net/bytecode.cvd

3) 取代原有的数据库

$ sudo cp *.cvd /var/lib/clamav

4) 测试

$ sudo freshclam

5) 将所有 cvd 文件拥有者改为 clamav

$ sudo chown clamav:clamav *.cvd

6) 其实已不需要用 sudo freshclam 来更新病毒数据库了, 因可用

$ systemctl status clamav-freshclam

可以看到日志的记录是有自己更新病毒数据库的