Configure call forwarding in GSM networks

There are times one one has more phone numbers than one can handle or when one needs to make sure one can receive calls on a number even when the phone’s battery died or there is no network coverage.

This is where call forwarding comes in – where for a price (the forward is taxed as an outgoing call) incoming calls can be sent to an alternative phone number…

Migrating CentOS 6 to PHP 5.5

I make the assumption that you’re running PHP 5.3 (the currently newest PHP version officially available in CentOS 6) or perhaps PHP 5.4.

The switch can, theoretically, be done on live system – just prepare yourself for a bit of hiccups here and there (or perhaps even serious downtime).

Enable hibernation in Xubuntu 16.04

Ubuntu (and its derivatives – Xubuntu, Lubuntu, Kubuntu) normally come with hibernation disabled by default, mostly due to possible hardware compatibility issues.

Re-enabling it is not a simple thing to do, despite logic dictating the opposite. Start by testing out whether or not your system is capable of hibernation…

Automatically restart Webmin/Virtualmin in case of failure

Running out of memory sometimes happens on swap-less VPSes, and it seems Webmin (together with its twin, Virtualmin) are among the first processes to die in out-of-memory cases.

Setting up a little script to check for and restart Webmin if it is no longer running is a pretty simple (workaround) solution – but should never replace the proper procedure of adjusting the settings or upgrading the VPS to avoid running out of memory in the future.