txtdel.sh

本shell脚本可以判定当前文件是否有.txt文件

#!/bin/sh
flag=0
if [ $# -eq 0 ]
then
for ii in `ls`
do
  if [ "${ii##*.}" = "txt" ]
   then
    flag=$(($flag+1))
   fi
done

#if [ `ls *|wc -l ` -lt `touch 1.txt && ls *|wc -l` ]
if [ "$flag" -eq 0 ]
 then
 echo "Error! The directory does not contain any files witn a .txt extension"
 echo
 else
for i in ` ls  *.txt`
do
   echo File : $i
   head -n 3  $i|awk '{ print NR ": " $0 }'|sed 's/^/Line /'
   echo -n "Delete ? Y|N: "
   read a
     if [ "$a" = "Y" ]
        then
        rm  $i
        echo  "File $i has been deleted "
     elif  [ "$a" = "N" ] ; then
        echo "File $i was NOT deleted "
      fi
     echo
done
 fi
fi


    while [ $# -gt 0 ]
do
    if [ ! -f  `pwd`/$1 ]
    then
    echo "Error! File $1 does not exist in the directory " 
    echo
    elif  [  ${1##*.} = "txt" ] 
      then
    echo "File: $1"
 head -n 3  $1|awk '{ print NR ": " $0 }'|sed 's/^/Line /'
   echo -n " Delete ? Y|N "
   read a
     if [ "$a" = "Y" ]
        then
        rm  $1
        echo  "File $1 has been deleted "
     elif  [ "$a" = "N" ] ; then
        echo "File $1 was NOT deleted "
      fi
         echo 
      else
       echo "Error! Unable to process $1.I can only deleted files witn .txt extnsion"
       echo
       
    fi


shift
done

 echo  "No more .txt file to process. Finished!"
 echo