How to create a reverse SSH tunnel so you can always login to your remote device.
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How to clone your Mac disk: an overview of various methods, some of which also apply to cloning disks using Linux.
Using a permissive domain to get around a SELinux issue involving ping return packets for a CGI script.
The Realtek RTL8111 has some trouble with autonegotiating Ethernet link speed, which can cause network problems, e.g. not receiving DHCP traffic.
Postfix, SASL and Unbound on RHEL 6: Installation notes are meant for my own future reference, others might benefit as well.
The Linux boot process can halt or exit to rescue mode when an external disk is unavailable or when an internal but non-critical disk is out of order. Use nofail to fix that.
How to use macvlan on the KVM hypervisor with macvtap on KVM guests so that the host and the guests can ping each other and behave like they are all on the same subnet (LAN).
Which application to use if you are in a LAN and want to share files with everyone in the same network?