Misc 20130401

• To reset all shortcut definitions in evince, run

  rm ~/.config/evince/accels

• GCC would complain if you define a variable without actually using it. To silience it, use

  (void)var;

• DNS is not working in VirtualBox: Run

  VBoxManage modifyvm "VM name" --natdnshostresolver1 on

  Ref 
• A useful link talking about ravlue reference in C++11 http://thbecker.net/articles/rvalue_references/section_01.html 
• To clear disk cache in Linux: Run

  sudo sh -c 'echo 3 > /proc/sys/vm/drop_caches'

  Ref
•  "screen-256color not found": Run

  infocmp xterm-256color > screen-256color.ti

  on a machine without this error, copy the file to the target machine and then run

  tic screen-256color.ti

  Ref
• Just switch to fcitx from ibus. I like a theme called 'anran'. If fcitx cannot follow the cursor on Firefox, turn on preedit, as said in the official wiki.
• Just played with a vim plugin called youcompleteme, for C++ autocomplete, which is quite powerful. Also I installed vundle, a vim plugin manager.

• To update vimrc just after some modification, run

  so %