#!/bin/bash
# http://stackoverflow.com/questions/29240694/tr-command-in-awk-to-change-the-column-values
perl -F, -lane '$F[$_] =~ tr/a-c/e-f/ =~ tr/0-5/6-9/ for (0); # (0, 4, 8);
print join(",", @F)' <<':'
abcbchs,degehek
abcbchs,degehek
abcbchs,degehek
abcbchs,degehek
abcbchs,degehek
abcbchs,degehek,lskjsjshsh
abcbchs,degehek
abcbchs,degehek,lskjsjshsh
:
IyEvYmluL2Jhc2gKIyBodHRwOi8vc3RhY2tvdmVyZmxvdy5jb20vcXVlc3Rpb25zLzI5MjQwNjk0L3RyLWNvbW1hbmQtaW4tYXdrLXRvLWNoYW5nZS10aGUtY29sdW1uLXZhbHVlcwpwZXJsIC1GLCAtbGFuZSAnJEZbJF9dID1+IHRyL2EtYy9lLWYvID1+IHRyLzAtNS82LTkvIGZvciAoMCk7ICAjICgwLCA0LCA4KTsKICAgIHByaW50IGpvaW4oIiwiLCBARiknIDw8JzonCmFiY2JjaHMsZGVnZWhlawphYmNiY2hzLGRlZ2VoZWsKYWJjYmNocyxkZWdlaGVrCmFiY2JjaHMsZGVnZWhlawphYmNiY2hzLGRlZ2VoZWsKYWJjYmNocyxkZWdlaGVrLGxza2pzanNoc2gKYWJjYmNocyxkZWdlaGVrCmFiY2JjaHMsZGVnZWhlayxsc2tqc2pzaHNoCjo=
effffhs,degehek
effffhs,degehek
effffhs,degehek
effffhs,degehek
effffhs,degehek
effffhs,degehek,lskjsjshsh
effffhs,degehek
effffhs,degehek,lskjsjshsh