今天学到一个Linux Bash的新词语，Here docuemnts。
Frequently, your script might call on another program or script that requires input. The here document provides a way of instructing the shell to read input from the current source until a line containing only the search string is found (no trailing blanks). All of the lines read up to that point are then used as the standard input for a command.
简答的说，就是直接将需要的文件内容写到Bash一起。
echo "These are the web browsers on this system:" # Start here document cat << BROWSERS mozilla links lynx konqueror opera netscape BROWSERS # End here document
从上面可以看出，以BROWSERS开始，到BROWSERS结束为一个文档。