add in the end of line, sed

1) in sed, "^" represents the begining of a line, and "$" the end of line, "^$" a blank line

2) if we want to add a string in the end of each line of a text file and save it to a new file:


#!/bin/csh
# find each file starting with "input" and apply the changes
foreach i ( `ls input*` )
    # get the last string in the filename separated by _
    set append = `echo $i | awk '{split($0,a, "_");print a[6]}' `     


    # add _elim_1fois at the end of each line and save it to a new file
    sed    's/$/_elim_1fois/'   $i  >> $i"_elim_1fois_"$append 
   
    sed   's/$/_elim_2fois/'    $i  >> $i"_elim_2fois_"$append


end