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  1. or download this
    my $packed;
    my $n =1000000-1;
    my $offset = $n*4; 
    my $success = shmread($id, $packed, $offset, 4)
    
  2. or download this
    use warnings;
    use strict;
    ...
    
    exit;
    
  3. or download this
    $ ipcs -m
    
  4. or download this
    ------ Shared Memory Segments --------
    key        shmid      owner      perms      bytes      nattch     stat
    +us     
    0x00000000 8454205    valerio    600        4294967296 0
    
  5. or download this
     
    $ perl -V:archname 
    archname='x86_64-linux-gnu-thread-multi';