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  1. or download this
    lanx@lanx-1005HA:~$ echo $a,$b
0,0
...
666 42
lanx@lanx-1005HA:~$ echo $a,$b
0,0
  2. or download this
    lanx@lanx-1005HA:~$ ps -edaf |grep perl
lanx      2731  2174  0 18:02 pts/2    00:00:00 perl -e print "@ENV{a,
+b}\n";sleep 100