Remove newline from end of file

Question

I want to remove newline \n only from end of the file in unix
e.g.

abc  
def  
ghi
​

output should be

abc  
def  
ghi

In the end of file there should not be a single \n

Answer 1

You can:

perl -pe 'chomp if eof' file1 > file2

Example:

$ cat file1
abc
def
ghi
$ perl -pe 'chomp if eof' file1 > file2
$ cat file2
abc
def
ghi$