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linux shell按行讀入文件

linux shell按行讀入文件   #/bin/bash    printf "*************************************\n"  echo " cat file whiel read line"  cat test.txt |while read line  do  &nbsp; echo $line;  done    printf "*************************************\n"  echo "while read line <file"  while read line  do  &nbsp; echo $line;  done <test.txt    printf "*************************************\n"  echo "for line in cat test.txt"  SAVEIFS=$IFS  IFS=$(echo -en "\n")  for line in $(cat test.txt)  do  &nbsp; echo &nbsp;$line;  done  IFS=$SAVEIFS  
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