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```
my $cmd = `ls -l`;
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$ cat backtictest.pl 
#!/usr/bin/perl
...
-rw-r--r--  1 user  group    260 May  6 17:58 Class2.pm
-rw-r--r--  1 user  group    331 May  6 17:58 MyExceptions.pm
-rwx------  1 user  group    182 May 21 07:38 backtictest.pl