Tag Archives: OpenSSH

TT: Uni-directional file synchronization between different hosts with Unison

When you work with at least two computers on the same project on a daily basis you might have a problem. You need to get changed files from host A to host B and vice versa. The problem getting bigger when you work in addition on different operation systems or use more than two hosts. On UNIX/Linux the preferred tool for such a task is Rsync. Unfortunately Rsync synchronize only in one direction, it doesn’t work very well when more than two hosts are involved (and it isn’t really comfortable to set up on Windows) and can’t use a secure communication channel. Another approach is to check-in changed source files into a version control system, like CVS. On host A you check it in and on host B you check it out afterwards. But this means you always need a more or less stable variant of your code, so that other developer can, at least compile, or much better use it. That is not always the case (especially when you leave the office at 11:00 p.m.) and it also doesn’t cover files which aren’t handled by a version control system. Luckily there is a solution for all the problems mentioned which is called Unison. So here comes the second post in the ToolTips series, which covers an easy and portable way for file synchronization.


FRITZ!Box tuning part 4: Cross-building and installing additional applications

The articles I wrote about the FRITZ!Box are pretty popular. They are creating the most traffic on my website. I understand this, cause the FRITZ!Box is a really great piece of hardware and AVM is also a company which knows how to make their users happy by serving regular updates to the firmware. Although I didn’t tuned my FRITZ!Box any further, I updated it with the latest Labor firmware version regularly. At some point the sshd setupĀ (with dropbear) doesn’t worked anymore and I decided it is the time to update my software as well. Beside that it didn’t work anymore it is always a good idea to update software which allow access to a host from everywhere very regularly. Anyway, it turned out this isn’t as simple as I initial thought. Therefore here is the next post in the FRITZ!Box tuning series, which shows how to cross-build software for the MIPS32 architecture used in the FRITZ!Box and in particular get the sshd software to life again. I use a FRITZ!Box Fon WLAN 7270 v2 and the firmware is 54.05.05. Please make sure you read the other FRITZ!Box articles as well, cause some of the information given there still applies.