Grep fields from file

Shell Programming and Scripting
1

I have two files

file1 :

   USER   CURR_TIMES   FAIL_CO F_TIME LAST_O_TIME
  ---------- -------------------------- ------------ ------------------- -------------------
  T123  2017-02-25 19:16:58 GMT 3 2017-02-25 13:28:29 2017-02-25 13:42:31
   K123  2017-02-25 19:16:58 GMT 3 2017-02-25 13:28:29 2017-02-25 13:42:31

file2 :

USER   CURR_TIMES   FAIL_CO F_TIME LAST_O_TIME
  ---------- -------------------------- ------------ ------------------- -------------------
  T123  2017-02-25 19:16:58 GMT 3 2017-02-25 13:28:29 2017-02-25 13:42:31

I want

grep(c1,c3,c4,c5) "T123  3 2017-02-25 13:28:29 2017-02-25 13:42:31"

from file1
and matched in file2 and would like to delete from file1

2

This reads from file2 first, then if file1 has a match in file2 the line does not print. Using awk.

awk '
       FILENAME=="file2" { arr[ $1 $3 $4 $5 ]++; next }
       FILENAME=="file1"  { key=$1 $3 $4 $5; if( ! key in arr) {print $0}} 
      ' file2 file1 >newfile

newfile has the changes from file1.