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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 %
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