y iptables based firewall allows only port TCP 80 and 443. I also need tcp port # 22, but I do not have static IP at my home. How do I open and close TCP port #22 on demand under Debian or Ubuntu Linux based server systems? How do I install a port-knock server called knockd and configure it with iptables to open tcp port #22 or any other ports?
ow do I install Java and C/C++ integrated development environment called Eclipse under Debian GNU/Linux squeeze v6.xx?
would like to use argparse module for Python 2.6 under Debian Linux. However, the code is not working. How do I install and use argparse Python module under Debian Linux 6.x for Python version 2.5 or 2.6?
have recently started to managing FreeBSD server along with Ubuntu Linux. However, sudo command, always shows me the following error:
zsh: command not found: sudo
How do I solve this problem and use sudo under FreeBSD 9.x system?
I‘m a new Unix user and trying to find the hidden directory called .movies but I do not know where it is on the file system. How do I find a hidden folder or directories under Unix like operating systems?
ow do I add a user to group under Ubuntu Linux operating system using command line options?
How do I install TrueType fonts under Debian GNU/Linux desktop operating systems?