Don't shell out to cd, use chdir
single quotes do not interpolate, so print 'cd $fbbin' prints literally cd $fbbin not cd /opt/firebird/bin
This is where you syntax error was, you were missing a closing single quote
Don't do localtime date math yourself, use strftime
use POSIX();
print POSIX::strftime('%Y-%m-%d-%H-%M-%S', localtime);
Don't shell out to ls, use glob function, so my @files = glob "*.$type";
Thats it :)
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