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creating a file in reverse order of another file

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# 1  
Old 11-27-2008
creating a file in reverse order of another file
Hi,

I have a requirement where i need to write a script to create the new file from the given input file with the data in reverse order (bottom to top)
Sample data:
Input File--------------
Java
VB
Oracle
Teradata
Informatica

Output file:-----------------
Informatica
Teradata
Oracle
VB
Java

Thanks,
Srilaxmi
# 2  
Old 11-27-2008
Code:
man tac

or if you don't have tac

Code:
sed '1! G; $ p; h'

# 3  
Old 11-27-2008
perl :

Code:
open FH, "<file";
@arr=<FH>;
print "",reverse @arr;
close FH;

shell:
Code:
sed -n '1 {
h
}
1 !{
  $ !{
    x
    H
  }
}
$ {
  x
  H
  x
  p
}' file

# 4  
Old 11-28-2008
You really should search before posting a question. You would get your answers in just a few seconds and we wouldn't have to revisit old questions.

https://www.unix.com/shell-programmin...rse-order.html
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