请教，一个shell程序的编写

Question

Write a shell script (/bin/sh) called 'fileline' which is passed two command line parameters. The first parameter is the
   name of a file and the second is a number 'n'. The script should write the contents of the nth line of the file to a new
   file called 'out'. If the input file does not exist or no such line exists in the file, the script should write an error  message to the terminal

Answer 1

给你个参考:
if [ ! -e ./PI.DAT ]; then
echo "no such file"
fi

Answer 2

原帖由 lengxb 于 2006-8-12 21:05 发表
Write a shell script (/bin/sh) called 'fileline' which is passed two command line parameters. The first parameter is the
   name of a file and the second is a number 'n'. The script should write  ...

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>>可以察看一些sh例程就可以解决了
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