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"some data after the end of the payload data" warning

raddison
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Hi guys,

Quite by accident, I tested the latest LTS User iso with 7-zip and and there was a warning message saying: "... some data after the end of the payload data". Then I tested the latest User iso and I got the same warning message. What exactly is that "some data"?

Best wishes community,
Richard

P.S. Oh, obviously I've researched the issue and the occurrence is not a bug in 7-zip. That "some data" is genuinely there. It's just that I can't find any explanation for it. Technically, it shouldn't be there, should it?


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raddison
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Oh, if I have checksummed the images? Sure. I'm doing it again right now and copypasting directly from the utility.

neon-userltsedition-20170329-0019-amd64.iso
SHA256
Code: Select all
bd21b7801957c7b8332467102dd67cecd2de30c3cfa7b1b3fdfd248ddbd85559


neon-useredition-20170323-1018-amd64.iso
SHA256
Code: Select all
efa4a966c8ed3e5613eae2fb402cf1b4ca2af3297fe98225df6f918a09168b65


https://files.kde.org/neon/images/neon- ... .sha256sum
https://files.kde.org/neon/images/neon- ... .sha256sum

I can't see any discrepancies. Can you? The thing is I intend to stick with these images for a while and I wanna be absolutely certain I've got what I bargained for. Thank you guys.


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NoNameNoBlame
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HINT:

If You want to compare 2 long strings visually, it's easier this way:

echo -e "\n…\n…\n"

$ echo -e "\nbd21b7801957c7b8332467102dd67cecd2de30c3cfa7b1b3fdfd248ddbd85559\nbd21b7801957c7b8332467102dd67cecd2de30c3cfa7b1b3fdfd248ddbd85559\n"

Readable Result:

bd21b7801957c7b8332467102dd67cecd2de30c3cfa7b1b3fdfd248ddbd85559
bd21b7801957c7b8332467102dd67cecd2de30c3cfa7b1b3fdfd248ddbd85559
NoNameNoBlame
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The offical way to check it:

First change into directory.
Then:

$ ls -l test.txt
1 -rw-rw-r-- 1 *** *** 1 Sep 29 2016 test.txt


$ sha256sum test.txt
00e3261a6e0d79c329445acd540fb2b07187a0dcf6017065c8814010283ac67f test.txt

# The Check
$ echo 00e3261a6e0d79c329445acd540fb2b07187a0dcf6017065c8814010283ac67f test.txt | sha256sum --check
test.txt: OK
raddison
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Thank you. Much appreciated.


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NoNameNoBlame
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It even gets better (easier):

$ sha256sum --check <<<"00e3261a6e0d79c329445acd540fb2b07187a0dcf6017065c8814010283ac67f test.txt"
test.txt: OK
raddison
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NoNameNoBlame wrote:It even gets better (easier):

$ sha256sum --check <<<"00e3261a6e0d79c329445acd540fb2b07187a0dcf6017065c8814010283ac67f test.txt"
test.txt: OK


Thanks. But say one is on Windows. All that is not applicable on Windows. What I would like to know is how on earth one can run a gpg check on Windows. I'm aware of Cleopatra but somehow I always failed with it. I don't know how to use it.

https://www.gpg4win.org/

On a second thought though, never mind. I'm quitting Windows anyways.


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raddison
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@NoName
Better tell me how do I enable the firewall from the terminal and how to check its status, cause I've forgotten it. I don't need any GUI to manage the firewall in Linux.

... and tell an opinion on Quidsup's Notrack software. If unfamiliar with it, check it on GitHub. Thanks.


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NoNameNoBlame
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raddison wrote:
NoNameNoBlame wrote:It even gets better (easier):

$ sha256sum --check <<<"00e3261a6e0d79c329445acd540fb2b07187a0dcf6017065c8814010283ac67f test.txt"
test.txt: OK


Thanks. But say one is on Windows. All that is not applicable on Windows. What I would like to know is how on earth one can run a gpg check on Windows. I'm aware of Cleopatra but somehow I always failed with it. I don't know how to use it.

https://www.gpg4win.org/

On a second thought though, never mind. I'm quitting Windows anyways.



On Windows with Kleopatra:

$ gpg --print-md SHA256 test.txt
test.txt: 00E3261A 6E0D79C3 29445ACD 540FB2B0 7187A0DC F6017065 C8814010
283AC67F

is the same as:

$ sha256sum test.txt
00e3261a6e0d79c329445acd540fb2b07187a0dcf6017065c8814010283ac67f test.txt

Last edited by NoNameNoBlame on Thu Apr 06, 2017 7:05 pm, edited 1 time in total.
NoNameNoBlame
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Firewall:

$ man -k 'firewall|ip?tables'
fwcheck_psad (8) - look for iptables rules that log and block unwanted packets.
fwsnort (8) - Firewall Snort
ip6tables-apply (8) - a safer way to update iptables remotely
ip6tables-save (8) - dump iptables rules to stdout
iptables (8) - administration tool for IPv4/IPv6 packet filtering and NAT
iptables-apply (8) - a safer way to update iptables remotely
iptables-extensions (8) - list of extensions in the standard iptables distribution
iptables-restore (8) - Restore IP Tables
iptables-save (8) - dump iptables rules to stdout
iptables-xml (1) - Convert iptables-save format to XML
ip6tables (8) - administration tool for IPv4/IPv6 packet filtering and NAT
IPTables::ChainMgr (3pm) - Perl extension for manipulating iptables and ip6tables poli...
IPTables::Parse (3pm) - Perl extension for parsing iptables and ip6tables policies
kmsgsd (8) - separates iptables messages from all other kernel messages.
nf2csv (1) - iptables to CSV data
ufw (8) - program for managing a netfilter firewall
xtables-multi (8) - xtables multi-link binary for netfilter's iptables and ip6tables
NoNameNoBlame
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NoNameNoBlame
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# "Message Digest Hash": The MicroSoft way…. PowerShell:

$ Get-FileHash -Path .\desktop.ini -Algorithm sha256 | Format-List


Algorithm : SHA256
Hash : CAFEC240D998E4B6E92AD1329CD417E8E9CBD73157488889FD93A542DE4A4844
Path : C:\Users\***\Documents\desktop.ini
raddison
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@NoName
You're clearly very knowledgeable. Thanks a lot.


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