Linux script or command to read top 50 file size

Dear Experts,

Since my disk-space is used more than 95%, Could you provide  linux
command or script to find out the top 50 biggest files size in my hard-disk so that I can delete those
not-important files with bigger file size. I check du and df command not including that .

Please advise
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ls -sR / | perl -MHeap::Simple -lne 'BEGIN{ $heap = Heap::Simple->new(elements => "Array")}m#^(/.*):# and $d=$1; m/^(\d+)\s+(.*)/ and $heap->insert([$1,"$d/$2"]) and print "$1 $d/$2"; $heap->count>50 and $heap->extract_top;END{print "@$_" for  $heap->extract_all;} '
rwniceingAuthor Commented:
ozo, thanks for your reply. I get this error on linux Centos when run the command  on linux shell
Can't locate Heap/ in @INC (@INC contains: /usr/local/lib/perl5/site_perl/5.16.2/x86_64-linux /usr/local/lib/perl5/site_perl/5.16.2 /usr/local/lib/perl5/5.16.2/x86_64-linux /usr/local/lib/perl5/5.16.2 .).
BEGIN failed--compilation aborted.
rwniceingAuthor Commented:
Or do I need to run it in script with including perl ?
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You could install it, or use a slightly less efficient method:
ls -sR / | perl -lne 'm#^(/.*):# and $d=$1; m/^(\d+)\s+(.*)/ and print "$1 $d/$2"' | sort -n | tail -50

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rwniceingAuthor Commented:
it works but including  all directory from root , how can I  just do it  for my account directory  such as "/home/myaccount" ?
ls -sR /home/myaccount
rwniceingAuthor Commented:
thanks for your rely ,now I know what  you mean  and following command works

ls -sR /home/myaccount | perl -lne 'm#^(/.*):# and $d=$1; m/^(\d+)\s+(.*)/ and print "$1 $d/$2"' | sort -n | tail -50
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