Smart Home: Getting Started with Home Assistant on Raspberry Pi
Various types of smart devices designed for smart home are developed, part of them can be connected to apple HomeKit, or connected to vendor’s ECO-system, th...
Recent posts
DNS resolution broken after uninstalling Pi-hole
After uninstalling the Pi-hole, I cannot access internet, and not even ping any domain name, finally, I found the nameserver in /etc/resolv.conf was changed ...
Track down the source of android toast
There are many ways to tell which app sends a toast, the most quickest way is to install third-party app such as Toast Source or Toaster, if you don’t want t...
Android procfs demystified – cpuinfo
From cpuinfo in procfs, we get a lot information about the cpu on board, how many cores, architecture etc, here is an example output of cpuinfo of RPI 3B+: `...
Analyzing Android with Battery Historian
Battery Historian is a tool for inspecting battery related issues, it works on android 5.0 and above, this can also be used for analyzing performance since b...
Debugging kernel with dynamic debug
Dynamic debug is a great feature for kernel debugging, kernel must be compiled with CONFIG_DYNAMIC_DEBUG option, if it was enabled, all pr_debug(), dev_dbg()...
Android procfs demystified – sysrq-trigger
The magic SysRq key is a key combination(Alt+SysRq+<cmd>) implemented by linux kernel, it is usually used to get more information for further investiga...
Turn vim into an IDE with spf13-vim
I’ve been using vim for a very long time, my vimrc file is based on Amix’s with minor modifications, I think it’s time to move forward embracing excellent pr...
Correct misspelled commands with thefuck
No one can guarantee that he never make mistakes while using command line, even an experienced user.