265  curl www.baidu.com先看看有网吗？
   266  yum install -y pcre* zlib zlib-devel libssl-devel libssl
   267  yum install -y openssl
   268  yum install -y epel-release
   269  yum install clamav  clamav-server clamav-data clamav-update clamav-filesystem clamav-scanner-systemd clamav-devel clamav-lib clamav-server-systemd
   270  /usr/bin/freshclam  更新病毒库
   271  clamscan -r /root    扫描指定目录
   272  service crond start 
   273  service crond status 
   274  chkconfig crond on 
   275  chkconfig –list crond
   276  vi /etc/crontab
   277  cd /root
   278  ls
   279  vim clamav.sh
   280  ls
   281  chmod u+x clamav.sh
   282  ls
   283  ./clamav.sh 写入freshclam
   284  vi /etc/crontab
   285  crontab -e# Example of job definition:
 # .---------------- minute (0 - 59)
 # |  .------------- hour (0 - 23)
 # |  |  .---------- day of month (1 - 31)
 # |  |  |  .------- month (1 - 12) OR jan,feb,mar,apr ...
 # |  |  |  |  .---- day of week (0 - 6) (Sunday=0 or 7) OR sun,mon,tue,wed,thu,fri,sat
 # |  |  |  |  |
 # *  *  *  *  * user-name  command to be executed00 2 * * 7  /root/clamav.sh表示每周7的凌晨2点跑一次这个文件
   286  crontab -l
   287  crontab -e
   288  crontab -l