GIT over SSH will create files with user:group from the user that’s doing the push. This will prevent other users from changing files, in particular updating refs/heads/. To share a GIT repo over ...

If GIT keeps asking for your password, even though you have private key auth set up, then its SSH probably doesn’t know which key to use. Fix this by making a “config” file in your user’s .ssh fold...

Quick registry hack that turns the Mac Command keys into Ctrl keys and turns the left most Ctrl key into the Windows key: Windows Registry Editor Version 5.00 [HKEY_LOCAL_MACHINE\SYSTEM\CurrentCon...

The GCC that comes with my Fedora installation doesn’t appear to have a __sync_val_compare_and_swap that works with __uint128_t, so here it is: #undef NDEBUG #include <assert.h> inline ...

I recently reinstalled my HTPC using Fedora 19 and, of course, installed XBMC on it. Here’s how to get Fedora to boot to XBMC without login. First, configure your desktop manager to auto-login. I...

I keep having to Google this, so I thought it’d just put it up here. This piece of code creates a SECURITY_ATTRIBUTES (and SECURITY_DESCRIPTOR) for the Everyone group. Handy for some quick-n-dirty ...

I was looking for a utility that would output every byte at an even offset from a file (e.g. skip bytes at odd offset). I couldn’t figure out how to do it with dd (from the looks of it, it might no...

Use “include:aspmx.googlemail.com” in your SPF record: yourdomain.com. 300 IN TXT "v=spf1 a mx include:aspmx.googlemail.com -all Check your /var/log/mail.log to make sure it’s working as expect...

I’m getting more and more familiar with the GIT workflow, which goes kinda like this: git checkout -b topicbranchX git add somefile git commit -m"commit message" git pull git rebase master git pus...

A few weeks ago I got interviewed by Shanghai TV about the Shanghai hackerspace 新车间 (XinCheJian) that I’m part of. In the interview I demonstrate one of the hacks I did, using a TP-Link router to o...