shell读取文件每一行的方式

1 -- SHELL读取文件的方法
#使用read命令读取一行数据
while read myline
do
 echo "LINE:"$myline
done < datafile.txt


#使用read命令读取一行数据
cat datafile.txt | while read myline
do 
 echo "LINE:"$myline
done


#读取一行数据
cat datafile.txt | while myline=$(line)
do 
 echo "LINE:"$myline
done


#读取一行数据
while myline=$(line)
do 
 echo "LINE:"$myline
done < datafile.txt


#使用read命令读取变量数据
cat datafile.txt | while read paraa parab parac
do
 echo "PARAA:"$paraa
 echo "PARAB:"$parab
 echo "PARAC:"$parac
done


#使用read命令读取变量数据
while read paraa parab parac
do
 echo "PARAA:"$paraa
 echo "PARAB:"$parab
 echo "PARAC:"$parac
done < datafile.txt