If you see that your server is running out of swap you should add more RAM, nevertheless this is not always possible or maybe you need that extra amount of swap for a very specific usage.
If this is the case you just need to add some more swap to your system. There are several usage cases I’ll just cover the 2 most common ones, without LVM and no extra space available on the partition and with LVM and available space on the volume group.
When you have large deployments with thousands of SSDs and spinning disks megacli utility provides a great help by having all the features and options available in a way that can be easily scripted and therefore automated.
With this how to you’ll be able to setup your encrypted LVM volume in 8 easy steps and less than 15 minutes.
After testing the new CentOS 7.0 here are my first impressions:
systemctl took some time to get into (learning done on my SuSE laptop distro)
I don’t really like the new FW config although I see some advantage there, if you already know iptables good enough not much to gain.
In this post I’ll be using DD-WRT build 23320 and an ASUS RT-AC66U router to establish two “always on” VPNs (using openvpn) using username / password authentication. This router supports all the new wifi protocols and in theory has over 1Gbps capability using dual band, also supports 2.4GHz and 5.0Ghz band communication. I’ve been using it with DD-WRT without any stability issues for more than 6 months now.
DD-WRT is one of my favourite linux distros, it’s specially made to work on home routers, APs and small appliances. You may download it from: http://www.dd-wrt.com and also make sure your equipment is supported by looking into the router database.
How do I enable IP forwarding on a Linux router? People ask me this time and time again so here are 2 short answers (if you don’t use IPv6 ignore the lines that contain ipv6 in the content):