Avoid cat file1>>file2 automatic add return after file2.

AshesOfTime · 11-25-2004, 05:32 AM

file2:tftp -l file -r file -g
file1:192.168.0.1

when i cat file1>>file2 the content is:
tftp -l file -r file -g
192.168.0.1

how to put them in one line?

thanks a lot.

Cedrik · 11-25-2004, 06:07 AM

You could use :

Code:

perl -pe 's/\n/ /' file1>>file2

There will be a space at the end of line tough

jlliagre · 11-25-2004, 06:34 AM

The problem is that there is already an end-of-line in file2, so I'm not sure Cedrik's solution works either. (well, perhaps, but I avoid using perl anyway).

This is something that should work:

Code:

echo $(<file2) $(<file1) > file3

Cedrik · 11-25-2004, 06:50 AM

Hey, I didn't know the use of $(<file), could you explain how it automagically remove the
\n's and replace them by spaces ? Is it the echo command that did it ?

jlliagre · 11-25-2004, 07:18 AM

No magic here

$(<file) isn't removing the \n, it's just a shortcut to $(cat file) which itself is a better way of doing `cat file` .

It is indeed the echo command that removed the \n.
Echo is displaying each of its arguments separated by spaces and ignoring the last \n of each of it.
If you have embedded new-lines in the files, you must process them another way.

Cedrik · 11-25-2004, 07:27 AM

thanks to clarify it