[linux] RE sed awk

RE( regular expression )
http://www.rtfiber.com.tw/~changyj/
http://phi.sinica.edu.tw/aspac/reports/94/94019/ch1.html

sed
http://www.study-area.org/linux/system/linux_shell.htm
http://140.114.98.15/~simi/File/upload/simi_sed_how.txt

awk
http://140.114.98.15/~simi/File/upload/simi_awk.htm