count from file output
January 12, 2011 at 11:39 am | Posted in ubuntu | Comments Off on count from file outputTags: shell, tips
cat file | cut -f 1 | awk ‘{tot=tot+$1} END {print tot}’
Delete large number of file by ‘find and rm’
March 26, 2009 at 1:04 am | Posted in android | Leave a commentTags: tips, Ubuntu
find ./ -iname ‘test-file-*’ | xargs rm -rf
rm 有最大刪除檔案的限制，大概是 2 萬個，若超過會出現錯誤訊息。
The maximum file limitation of deletion one time about 20 thousand.
The ultra fast way to find a code location
January 21, 2009 at 12:47 pm | Posted in android | Leave a commentTags: tips
Just add package:android to a google code search.
If you want to find the class “phonenumberutils”, you can input string like “phonenumberutils package:android”
The search result is http://www.google.com/codesearch?q=phonenumberutils+package:android.
Disable system beep~~
November 5, 2008 at 2:19 pm | Posted in android | Leave a commentTags: tips, Ubuntu
1. vi ~/.inputrc
set bell-style none
2. vi ~/.vimrc
set vb
3. vi ~/.bashrc
alias less='less -Q'
Reference:
關閉惱人的嗶嗶聲
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