reverse lines of file

use rev filename. For example,

[xianjund@douglasgran hypotest]$ head test11.data 

ENSG00000007372 ENSG00000109911 ENSG00000121690

ENSG00000007372 ENSG00000149100 ENSG00000170959

ENSG00000043355 ENSG00000175198 ENSG00000102452

ENSG00000172845 ENSG00000115840 ENSG00000091428

[xianjund@douglasgran hypotest]$ rev test11.data

09612100000GSNE 11990100000GSNE 27370000000GSNE

95907100000GSNE 00194100000GSNE 27370000000GSNE

25420100000GSNE 89157100000GSNE 55334000000GSNE

82419000000GSNE 04851100000GSNE 54827100000GSNE

It's cool, hmm?