A VPN connection is still mostly regarded as “business solution”, only useful to connecting employees to the company network. But this is no longer true nowadays.
VPNs can be very useful in protecting the integrity and security of data transfers, no matter who the two communicating parties are. To learn how to set up a connection and connect to a VPN server…
There are mainly 3 types of VPN servers: Point-to-Point Tunneling Protocol (PPTP), Layer 2 Tunneling Protocol (L2TP) and OpenVPN.
In this tutorial I set up a PPTP server on a CentOS VPS as its supported by almost all devices natively: Windows, Linux, Android, iOS and Mac.
KVM (Qemu) virtualization comes with a batch of useful basic command line tools to administer virtual machines without having to use the graphical VM manager.
To view the list of all virtual machines present on the system…
I finally found the proper uTorrent (wine/Server) replacement for Linux (preferably headless) systems – qBittorrent.
Unfortunately there seems to be no repository out there providing qBittorrent for CentOS 6, so I had to compile it from source – not the easiest task I have to admit.
Webmin (Virtualmin) has great service monitoring capabilities, restarting any failed services that it detects. Unfortunately, it cannot and does not monitor or restart itself it it crashes.
Still, since on (most) Linux systems it comes with a service manager, this can be used to check its status. The included bash script does this and restarts it if necessary…
One may find himself in the face the scenario of having to fix a friend’s infected computer and needing internet access to install/run cleanup utilities while at the same time trying to avoid spamming the internet and get the public IP blacklisted or even blocked.
Using a router running DD-WRT, this is easy to do using custom firewall rules…
When one needs to quickly check the individual PHP memory_limit value for a long list of virtual servers (presumably hosted by Virtualmin), going from folder to folder and reading the contents of the etc/php.ini file is one (loooooong) way of doing things. Fortunately, there’s an easier way, with the help …
I’ve recently stumbled upon the weird issue of Wordpress loading its styles and scripts via HTTPS although it wasn’t configured to use SSL. The website did indeed have a SSL certificate installed and usable.
I eventually found some useful information about Wordpress’ is_ssl() function…
Virtualmin displayed wrong amount of available memory on OpenVZ systems for a while (displaying either the guaranteed RAM instead of the burst or some random smaller value).
After the update to Virtualmin 4.02, the available RAM graph completely vanished from the system information page. To fix this…
If you leave PuTTY connected for long periods of time on tail -f /some/log/file you may have noticed the SSH server disconnects you after a while if there is no new input on that log file.
You could configure PuTTY to enable connection keepalive functionality, but you’d need to either do that for every session or every saved server in the list. The easier way is to enable this functionality on the servers themselves…
If you’re running a CentOS 5/6 VPS/Server with Virtualmin and installed Munin to graph the system stats, you’ll mostly likely notice that the generated graphs do not include MySQL.
This is expected behaviour since Virtualmin asks you to define a root password for your MySQL server (so it isn’t left unsecured out in the open), while Munin tries to read MySQL data using the root account and no password and fails.
But there’s an easy way to fix this…
If when running the servers validation in Virtualmin you get an error like
Administration user : Unix user USER’s quota of Unlimited does not match the domain owner’s quota of 1024 MB
the solution, while not at all obvious, is quite simple.
