bash references

(book)
- 入門　bash ver.3 (2005)
- cookbook
- classic Shell Scripting (2006)
(not yet read)
"classic shell"

(web)
- http://tldp.org/LDP/Bash-Beginners-Guide/html/index.html
- http://www.ne.jp/asahi/yokohama/juk/bash-script.html
(kuwamura-san)
- http://www.gnu.org/software/bash/manual/bashref.html
- http://furyo.on-air.ne.jp/linux/bash.html
(in Japanese)