How to use logrotate by linux

In a server environment it’s quite important to keep the size of log files in track. Everyone knows the problem of increasing file sizes in this matter. Therefore the logrotate daemon may help you to solve this problem. Files are rotated ore removed in a defined time slot to gzipped files for X times. You [...]

How to enable USB support in VirtualBox on a linux host

There is a common problem to get USB support running in VirtualBox on a debian or ubuntu linux host system. If there is a Windows XP (maybe also other system) installed as the guest system, the USB devices will be shown in the VirtualBox menue – but they are disabled. The devices are recognized but [...]

ProFTPd authentification with MySQL

It’s very helpful to use the mysql authentification for proftpd. Especially if you manage a quite number of users. So you’re able to use a central database which manages the accounts.

Changing ssh port to improve security

For security reasons, it’s advisable to change the ssh standard port 22 into something else. So you will get less attacks to sshd. This improves the security for your server. Furthermore, you should block root from connecting via ssh.
Open your /etc/ssh/sshd_config
Changing the port:

# This is the sshd server system-wide configuration file. See sshd(8)
# for [...]

Scripting a firewall with iptables

IPTables is a text based frontend for the ipchains kernel module. The ipchains support is compiled into most kernels of todays distributions. With iptables you don’t have to use a graphical tool. So it’s very suitable for scritpting.
First thing to do is installing neccessary packages, for Ubuntu / Debian:
apt-get update
apt-get install iptables
When the package is [...]