Questions tagged [hash]

Questions related to hashes, hash values or hash codes that are returned by hash functions such as MD5, SHA-1 and SHA-256 and provide a simple way to check the integrity of a download.

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51 views

How to use hashed passwords with netplan (for wpa2 enterprise) instead of plain text passwords?

I have a question concerning this post How do you configure Netplan on Ubuntu to store 802.1x credentials securely? Because I am a nooby, I don't have the reputation to comment on posts and creating ...
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Cannot run sudo apt-get update on Ubuntu 16.04 [duplicate]

I am using Ubuntu 16.04 on Dell XPS 13 and having issues doing many things, and the common fix is usually, sudo apt-get update And I get these four errors: E: Failed to fetch store:/var/lib/apt/...
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1answer
58 views

Checksums aren't martching for kubuntu

I have downloaded kubuntu 18.04.2 from here. I verified ISO by sha256 checksums, surprisingly they are different. The sha256sum for ISO: ...
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3answers
136 views

change many file names to hash (sha256)?

I have a bunch of video files where all the file names are un-useful gibberish. 1) Is there an easy command to change the names of all the files in a folder to a hash, like (sha256).mp4? I don't want ...
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Hash Sum mismatch on sudo apt upgrade on Ubuntu 18.04 [duplicate]

While upgrading packages on Ubuntu 18.04 via command sudo apt upgrade, I am receiving Hash Sum mismatch. I have tried doing according to answers of this question, but not worked.
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hashed password of encrupted pdf

I try to understand the meaning/name of individual strings which are separated by '*' in the following pdf hash.txt , but I can't get any description,,,Is there anybody to help please!? MyPDF.pdf:$...
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1answer
99 views

hash doesn't show me a list of Bash commands

I read in the O'reilly Bash book (third edition, 2005) what I understood as that if I'll execute hash I'll see a "hash table" with a list of all possible Bash commands plus all commands common to most ...
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Migrating servers

For my sins I am assisting a friend in migrating from a 10 year old SuSE mail server to one running Ubuntu-18.04. One of the things I need to do is migrate over about a dozen or so users--several of ...
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Where is the authoritative location for new Ubuntu releases? [duplicate]

An AWS droplet running Ubuntu is now reporting itself as Ubuntu 16.04.5 LTS but I find no reference to this version on ubuntu.com. The latest version is showing as 16.04.4 (http://releases.ubuntu....
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1k views

Which type of hash is this? [closed]

This password is secure, it's encoded at least 13 times.. What could go wrong really? Vm0wd2QyUXlVWGxWV0d4WFlURndVRlpzWkZOalJsWjBUVlpPV0ZKc2JETlhhMk0xVmpKS1IySkVU ...
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2answers
4k views

Hash Sum mismatch error when trying to upgrade [duplicate]

I am getting this error when trying to upgrade: E: Failed to fetch http://archive.ubuntu.com/ubuntu/pool/main/l/linux-firmware/linux-firmware_1.157.15_all.deb Hash Sum mismatch To check what is ...
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2answers
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Error CL_PLATFORM_NOT_FOUND_KHR in running HashCat 4.0.1

I've downloaded HashCat 4.0.1 form its official website. Running it show following error: root@mstehr:~/hashcat-4.0.1# ./hashcat64.bin -I hashcat (v4.0.1) starting... clGetPlatformIDs(): ...
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871 views

Acceptable Hashes by shadow

What hash algorithms does /etc/shadow accept? I've tried generating password hashes from PHP, using password_hash("password1234", PASSWORD_DEFAULT);, but that doesn't seem to work when I try to ...
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1answer
494 views

What packages in Ubuntu repositories provide BLAKE2 sums on 16.04?

I am looking to calculate BLAKE2 hashes for files on my Ubuntu 16.04 machine. I would like something similar to md5sum or sha512sum for BLAKE2, however have not found a package in the Ubuntu ...
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1answer
2k views

How can I verify Lubuntu ISOs? [duplicate]

I want to download and verify the ISO of lubuntu. The problem is I can't find a secure channel in the first place. The official ISO here is being downloaded with http (not https). Of course I can ...
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1answer
235 views

hashdeep with sha1 and sha1sum create different results

I computed a sha1 hash of the file '/etc/mtab' with hashdeep on Ubuntu 16.04. Then I computed a sha1 hash of the same file with sha1sum. And I got a different hash! When computing hashes for other ...
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1answer
14k views

Ubuntu 16.04 LTS Failed to fetch / Hash Sum mismatch [duplicate]

Here's what I keep getting when I sudo apt update Hit:1 http://archive.canonical.com/ubuntu xenial InRelease Ign:2 http://dl.google.com/linux/chrome/deb stable InRelease Get:3 http:...
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1answer
82 views

Changing between keymappings leading to defective keys - custom mappings a solution?

Original title: Losing the # key after swapping between keymappings When I swap between to key-mappings, I seem to lose the functionality of several keys. This seems to affect the hash symbol (...
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1answer
819 views

How to increase the number of hashing rounds for /etc/shadow?

I usually use long passwords for my machines, but I heard that it's possible to increase the number of hashing rounds and get the same security with a shorter one. How would I make my system use more ...
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3answers
661 views

How to protect from CIA #Vault7-like attacks into Linux from Windows

Linux is compiled from open-source and thousands of developers would spot any malicious source code. However many Linux users dual boot Windows and malware / spyware / "spook"ware (CIA) software could ...
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3answers
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authconfig: command not found ubuntu

I'm trying to use hashcat to validate a hashing algorithm but keeping this error when using authconfig command. error: authconfig: command not found ubuntu Am I missing something? I haven't ...
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1answer
25k views

“hash sum mismatch” error when doing update [duplicate]

I have just installed 16.04 LTS. However, I cannot update. $ sudo apt-get update Fetched 34,3 MB in 1h 51min 52s (5.110 B/s) Reading package lists... Done E: ...
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1answer
132 views

Why are there no gpg signed hashes for the mini.iso

None of the gpg-signed files I've found containing hashes for various ubuntu iso files contain a hash for the mini.iso files. The only hashes for the mini.iso files I've found are plain md5sums on the ...
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1answer
1k views

How do I generate a 'Hash-Code' for a document or photograph?

I want to generate a 'Hash-Code' for a document and a photograph. How do I do this please?
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1answer
270 views

How are password hashes compared?

I was doing an exercise today, which includes creating a new user by manually editing /etc/group ; /etc/shadow ; /etc/passwd Now, referring to /etc/shadow, I had to create password hashes. I used ...
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1answer
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Ubuntu partitioning and hashing

I need to split up Ubuntu in two partitions: one partition that contains all the files that do not change over time, for instance because of changes in the date/time and logins, and another partition ...
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1answer
1k views

How do I update shadow file password hashes after changing the encryption method?

I had gone through with this link. Suppose my current-encr is SHA-512, SHA-256, or another, the password hash would be stored (in /etc/shadow) of the user based on the current encr and would use ...
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1answer
85 views

Where can I locate legacy hashes for older minor releases? [closed]

I need md5sum or sha1sum hashes for version Ubuntu 14.04.3 Can someone please help me locate them?
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1answer
300 views

Steam hash sum mismatch and invalid file format errors

I have Steam Beta installed, and when I just ran: sudo apt-get update I got the following output: Ign http://security.ubuntu.com vivid-security InRelease Ign http://gb.archive.ubuntu.com vivid ...
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2answers
2k views

Why hash file are always different in openssl aes-256-cbc output files?

I tried to encrypt file using this command: openssl enc -aes-256-cbc -in $infile -out $outfile -pass file:$keyfile For the same input file, Why the output files has different hashes.
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1answer
75 views

How to file a bug report against Ubuntu in general?

I am wanting to file a bug report against Ubuntu in general, because I have noticed that the Ubuntu security hashes provided, are only MD5sums, and as for security reasons MD5 is being phased out, it ...
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1answer
466 views

Nautilus script to compare hash values of two files

Sometimes I need to check if two files are identical. I attempted to make a bash script to achieve that but I can not make my head around it. I found below script on the net, I placed it in Nautilus ...
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1answer
79 views

How to search for files through hashsums

I search for files often in my files system by either using the tree command and grep, or the find command, but recently I downloaded some content from a site, but forgot where I saved it, now I know ...
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2answers
2k views

How to generate randomart of anyfile?

We all know the ASCII randomart generated by ssh-keygen when creating or validating ssh public keys. We also know you can generate hashes of any file with sha1sum or md5sum. But, is it possible to ...
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1answer
3k views

Differences between md5pass and md5sum

This question may be insane ,but due to definition of hash algorithms, hash algorithms are some kind of functions that accept variable length input and make it encrypted and the output always has a ...
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1answer
571 views

ubuntu MD5SUM hash doesnt match, now how to repair the iso image?

I have checked MD5SUM hash for the downloaded Ubuntu desktop 14.04 and it didn't match. I have downloaded the file from official website without using any client like utorrent etc. How can I repair ...
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2answers
446 views

ubuntu-14.10-desktop-amd64.iso might be broken or hash wrong [closed]

I downloaded the file ubuntu-14.10-desktop-amd64.iso three times and i got always the md5-hash f58827df4b80befc7f1e5cf3816d6d36. https://help.ubuntu.com/community/UbuntuHashes says the md5-hash is ...
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1answer
424 views

MD5 of official Ubuntu downloads NEVER match

I have tried to download the 14.04.1 and 14.04 versions of Ubuntu serveral times from different mirrors on different PCs/Laptops using Firefox to download from the site and BitTorrent to download via ...
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1answer
809 views

What are the hashes for the various flavours of Ubuntu?

The hashes posted on Ubuntu Hashes do not mention 14.04.1. Where and what are the hashes for the 14.04.1 images?
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2answers
888 views

md5 hashes are different with iso-images of 14.04 amd64 server and desktop

What shall I care for? Are sums given at https://help.ubuntu.com/community/UbuntuHashes wrong? Or do used progs calculate wrong? description/Source md5-hash WinMD5Sum:...
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2answers
764 views

hash of lubuntu-14.04.1- desktop-amd64.iso

I can not find what the hash of Lubuntu-desktop-14.04.1- amd64.iso is. Original language commented out, but still there
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3answers
5k views

hash value on directory

I want to verify integrity of folder. The folder has so many files and folders. How to calculate hash value of directory as a whole on Ubuntu. md5sum calculate at only file level.
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1answer
600 views

Is there an alternative for the Windows software “hashcheck” in Ubuntu?

hashcheck checks for matches of many common hash codes. (See http://code.kliu.org/hashcheck/) Is there an alternative for this software for Windows on Ubuntu?
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1answer
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Hash mismatch error while updating and trouble installing some packages

I am using Ubuntu 14.04 and my college provides us software repositories which we can access from inside the campus. I tried installing java and only after that I started getting the hash mismatch ...
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1answer
145 views

Copy all files whose hashes don't match

I currently have a hash list (known good) of a selection of various files. I want to copy all files when their hashes do not appear in the hash list to a separate directory. I have got the md5deep ...
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4answers
2k views

Is there a checksum utility equivalent to Hashtab for Windows?

I use Hashtab in Windows to compute the hash of a file. All I have to do is right click on the file, click properties and in the properties menu there would be a tab called Hash and it contains the ...
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0answers
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md5 Hash for 12.04.3 versions not listed [duplicate]

The UnbuntuHash page only lists hashes up to version 12.04.2. Where can I find the hash for 12.04.3?
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2answers
968 views

sha256sum/md5sum gives different results for big files (Ext4/Full disk Encryption)

Yesterday I reinstalled Ubuntu 13.04 64-bit on my computer (4GB RAM), and for the first time I decided to use Full Disk Encryption (all default settings). Today while running backups my computer ...
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1answer
2k views

Deja-Dup Backup Failed - Invalid data - SHA 1 hash mismatch for file

On my most recent weekly backup today, Deja-Dup gave me this little love note: Backup Failed Invalid data - SHA1 hash mismatch for file: duplicity-inc.20130124T230054Z.to.20130201T225108Z....
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3answers
2k views

Are ubuntu packages (deb-files) only md5sum secured?

Introductory Background to the question below### (so the question is more usable to more people) Inside of an Ubuntu/debian-style package (*.deb file) there is a file named /DEBIAN/md5sums which has ...