Saturday, 24 March 2012

ClamAV 97.4 error while loading shared libraries

I installed ClamAV 0.97.4 on my Kubuntu system today, the installation went OK and no error were shown but when I tried to run virus scanning I got this error message:

clamscan: error while loading shared libraries: cannot open shared object file: No such file or directory

A quick browse and found that the following fixed this:
sudo ldconfig

Tuesday, 6 March 2012

20 Linux System Monitoring Tools Every SysAdmin Should Know

Very good article on some essential monitoring tools.

iptables: Blocking attacking IP addresses

Excellent article on using iptables to block an attacking IP address.

I needed to block a known russian SSH/SFTP hacker.

iptables -A INPUT -s -j DROP

Even better for automated blocking of attackers is denyhosts. DenyHosts is a script intended to be run by Linux system administrators to help thwart SSH server attacks (also known as dictionary based attacks and brute force attacks).