copy file into another file problem

nile

while read line_f1 <$file1; do
  while read line_f2 <$file2; do
      echo $line_f1 >> $output
      echo $line_f2 >> $output
   done
done

muzx

仅仅是一个治标的办法,供参考(SCOUNIX):

1. sed -n -e '1,2p'  1.txt;sed -n -e '2,3p' 2.txt >3.txt

复制代码

红袖添香

原帖由 "fatfish" 发表：
i have files:

1.txt, 2.txt

1.txt
~~~~~~~~~~~~~~~~~~
hi
~~~~~~~~~~~~~~~~~`
2.txt
~~~~~~~~~~~~~~~~``
my friend
~~~~~~~~~~~~~~~
how to do the shell command to achieve
1.txt
~~~~~~~~~~~~~~..........

   


i'm very confused with your notation and statement. how many lines in 1.txt or 2.txt? should they just be concatenated or shold be done in certain order? are the wave lines "~~~~~" parts of the text? if not,

# cat 1.txt 2.txt > 3.txt

maybe solve your problem.