求助

249957310

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.

高手们 能不能帮我解决一下这个问题啊。小女子在此谢过了

大蚂蚁

很多脚本的开头都有这个参数检查的，自己搜索一下吧
给你个我谢的一个统计脚本的例子

1. 
   
2. #!/usr/bin/ksh
   
3. (($#!=1))||[[ ! -f $1 ]]&&{ echo "Usage:./$(basename $0)  filename"; exit 1; }
   
4. rm caps.tmp>/dev/null 2>/dev/null;
   
5. rm cap.tmp>/dev/null 2>/dev/null;
   
6. grep TC_BEGIN $1 >cap.tmp
   
7. awk   '{gsub(/\[DS1\]/,"|");
   
8.         gsub(/ /,"");
   
9.         gsub(/\)=/,"|");
   
10.         gsub(/-/,"|");
    
11.         gsub(/\(/,"|");
    
12.         print $0
    
13.         }' cap.tmp >caps.tmp
    
14. awk -F "|" '{array[i++]=$6;if(i>1){caps=(array[i-1]-array[i-2])/60;print $1,caps}}' caps.tmp
    
15. rm caps.tmp
    
16. rm cap.tmp
    

复制代码

249957310

bash: ./fileline: /usr/bin/ksh: bad interpreter: No such file or directory
but why I got this information after compile
thanks again

大蚂蚁

whereis ksh

zh57469

root@saixu25 /tmp : cat fileline.sh
#!/bin/sh
if [ $# -ne 2 ]
  then
      echo "
usage : fileline.sh filename no_of_line
           "
      exit
fi

if [ -f $1 ]
  then
      sed -n "1,$2p" $1 >$1.out
  else
      echo " $1 not found "
fi

hwh5240

want csh?

249957310

ksh

is in the code you gave me in the first line so I though maybe some mistakes. Please help me  to correct them.

249957310

大蚂蚁 你给我的代码有点问题 请帮帮忙 谢谢