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0
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1answer
22 views

how to bring back md5deep

I have been using md5deep for a very long time, more than 10 years. It is a natural "go to" tool for me since it offers recursion, matching and missing modes, and even a triage which I do like. I ...
1
vote
2answers
1k views

md5 or sha1 while copying a file

Is there a way in any linux distro to perform a md5sum or sha1 check while the file is being transferred from a local partition to an NFS one? Example: I have a NFS mounted drive and a very big file ...
1
vote
1answer
25 views

Debian package's files authentication

I know that dpkg keeps md5sums of configuration files for each package installed, so it can tell whether they are changed or not when upgrading. Does it keep md5sums for regular (non-configuration) ...
6
votes
2answers
6k views

/etc/shadow : how to generate $6$ 's encrypted password?

In /etc/shadow file there are encrypted password. Encrypted password is no longer crypt(3) or md5 "type 1" format. (according to this previous answer) Now I have a ...
6
votes
1answer
279 views

Use md5sum to verify file in a script

This question is probably quite easy but I don't know how to accomplish this. I want to verify a file using md5sum -c file.md5. I can do that by hand, but I don't know how to check the validity in a ...
13
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2answers
828 views

Why do these duplicated SD cards have different sha1sums for their content?

I have a bunch of Class 10 UHS-1 SDHC SD cards from different manufacturers. They are all partitioned as follows $ sudo fdisk -l /dev/sdj Disk /dev/sdj: 14.9 GiB, 15931539456 bytes, 31116288 sectors ...
14
votes
3answers
10k views

Calculate md5sum of a CD/DVD

I have an ISO file, which I burned to a CD. Now how can I check if the CD is correctly created? I would like a command that calculate the hash sum that I can use to check with the hash sum I calculate ...
1
vote
1answer
19 views

Openssl generate invalid websocket security code

I need to write websocket server on GAWK. And server must handle user's Sec-WebSocket-Key by following algorithm (from RFC): Concat key with 258EAFA5-E914-47DA-95CA-C5AB0DC85B11 Take sha-1 in binary ...
1
vote
1answer
32 views

Command to verify CRC (CRC32) hashes recursively

With the commands md5sum, sha1sum, sha256sum I can take a text file having an hash and a path per line and verify the entire list of files in a single command, like sha1sum -c mydir.txt. (Said text ...
1
vote
0answers
16 views

Benefit of using multiple checksums for a group in AIDE

What are the benefits to having all md checksum functions specified for a group when running AIDE? For example, what is the difference between defining the first line and the second line with less md ...
1
vote
1answer
69 views

Executing a command in remote machine and redirecting output to a local file

I am uploading a file via sftp and just performing the safety test if the file is completely uploaded to the remote server. I am taking md5 hash of both(file in local and file in remote server) and ...
11
votes
5answers
11k views

generate consistent machine unique ID

Can we generate a unique id for each PC, something like uuuidgen, but it will never change unless there are hardware changes? I was thinking about merging CPUID and MACADDR and hash them to generate ...
4
votes
1answer
47 views

Best way to programatically detect the current host (by hardware features)

I have a hard drive with a Linux installation on it that I like to boot from different physical computers. My question is whether it's possible to programmatically detect which computer the drive is ...
0
votes
1answer
68 views

Using hashed password for adduser function in Linux

Sorry, I´m novice in Linux and I am looking for information, how to create new user account in Debian with pre-defined encrypted password. I have a function in bash, that if new user´s id´s are not ...
0
votes
0answers
13 views

Hash Sum Mismatch LMDE2

I have just installed LMDE2 Cinnamon and I am having problems to install two updates, blueberry and cinnamon-translations. Both in the Update Manager and using apt-get -f install says that ...
1
vote
1answer
106 views

md5sum for every file (with ll)

I want output like this: name size and hash: myfile.txt 222M 24f4ce42e0bc39ddf7b7e879a mynewfile.txt 353M a274613df45a94c3c67fe646 For name and size only I have ll -h | awk '{print ...
1
vote
1answer
144 views

What hash algorithms can I use in preseed's passwd/user-password-crypted entry?

When it comes to passwd/user-password-crypted statement in a preseed file, most examples use an MD5 hash. Example: # Normal user's password, either in clear text #d-i passwd/user-password password ...
1
vote
3answers
67 views

Merge several files on the basis of the md5sum

I have a file data.txt, which was divided into fragments. I need to properly combine fragments of files so that the original file was created data.txt. I do not know what procedure does this, because ...
2
votes
1answer
445 views

How to fix error message Hash sum mismatch error

I recently upgraded my Linux Mint to Rafaela 17.2 and while I was tweaking a little bit the interface and installing some themes and icons, I found myself with this annoying error message: W: ...
3
votes
1answer
40 views

chpasswd and openssl

I'm trying to pass an MD5 password to chpasswd but it doesn't seem to work. echo username:$(openssl passwd -1 -salt salt password) Then I try to pass this to chpasswd to change the password echo ...
4
votes
4answers
2k views

is it possible to create a file given an md5 hash

I know this is a strange question, and I know that md5sum is nearly impossible to break... but I'm just wondering if someone here knows if it is possible to recreate a file given it's md5sum hash? I ...
1
vote
1answer
20 views

creating and using hashsum in .iso image

I recently came across sha1sum -c . As the manpage states - -c, --check read SHA1 sums from the FILEs and check them Now I know how to generate and use sha1sum from an .iso . For ...
0
votes
1answer
23 views

Script add's md5sum to duplicate filenames but still get error notifications when executed

So by using some info from other threads on this site I have managed to get a script to copy files to another directory, then add the md5sum into the duplicate file names. However, I'm not fully ...
1
vote
2answers
154 views

HDD image file checksum does not match with device checksum

I have a 660297728 byte HDD image with MD5 hash f5a9d398e974617108d26c1654fe7bcb: root@T42# ls -l image -rw-rw-r-- 1 noc noc 660297728 Sep 29 19:00 image root@T42# md5sum image ...
0
votes
1answer
123 views

Want a sha256 ssl cert,but i get sha1,why?

I use this procedure openssl req -newkey rsa:2048 -sha256 -subj "/C=IT/ST=Lazio/L=Roma/O=Blu/CN=server.server.server" -keyout ssl.key -out ssl.req -passout file:"/root/pass" ;done #sign certificate ...
0
votes
1answer
275 views

BASH: Getting the md5 hash of file on remote server

Is there a way I could get the md5 hash of a file on a remote server? I'm looking for a command like md5 hlin117@server:/path/to/file.txt
3
votes
3answers
429 views

How to rename multiple files to their contents' MD5 sum?

I would like to rename some files to their contents' MD5 sum; for example, if file foo is empty, it should be renamed to d41d8cd98f00b204e9800998ecf8427e. Does it have to be script or can I use ...
2
votes
3answers
55 views

find and md5sum not yielding any output (find -o limit?)

I ran into a situation that I don't really understand. I have a bunch of backup files in a recursive structure of which I want to calculate the md5. When I add some additional file extensions the ...
1
vote
3answers
84 views

Get checksum of directory on bash

I was wondering: Is it possible to create a checksum of a directory (using something like md5sum) Is it possible to recursively create checksum for each file inside the dir (and then print it out)? ...
34
votes
6answers
75k views

How to create SHA512 password hashes on command line

In Linux I can create a SHA1 password hash using sha1pass mypassword. Is there a similar command line tool which lets me create sha512 hashes? Same question for Bcrypt and PBKDF2.
1
vote
2answers
108 views

MySQLdump via crontab - Pass --password=/hashed/password/file so I can use via crontab w/o using plain text password

So I'm setting up a WordPress backup guide/making a backup schedule for myself for real. I want to do MySQL dumps daily, but the command either requires -p then user input or ...
0
votes
1answer
63 views

Replace the first word of each line with its MD5

I have file with two space separated word in each line. I am looking for shell scrip in Unix to replace the first word of each row with its md5 hash representation. I have tried to adjust what is ...
10
votes
5answers
8k views

How can I get a base64 encoded shaX on the cli?

sha1sum outputs a hex encoded format of the actual sha. I would like to see a base64 encoded variant. possibly some command that outputs the binary version that I can pipe, like so: echo -n "message" ...
1
vote
2answers
140 views

Does the hash of a file change if the filename changes?

Does the hash of a file change if the filename or path or timestamp or permissions change? $ echo some contents > testfile $ shasum testfile 3a2be7b07a1a19072bf54c95a8c4a3fe0cdb35d4 testfile
1
vote
2answers
107 views

Difficulty using 'md5sum -c'

I'm having some difficulty using md5sum to verify some copied files. I have two directories: dir1 and dir2. In dir1 there are five files: file1, file2, file3, file4 and file5. dir2 is empty. If I ...
9
votes
5answers
461 views

find | xargs shasum creates checksum of checksum file itself (prematurely) and fails when checking

My problem (in a script with #!/bin/sh) is as follows: I try to checksum all files in a directory for archival purposes. The checksum (in my case sha1) file with all filenames should reside in the ...
3
votes
2answers
109 views

Help checking the integrity of TAR files for backup

I want make a backup of my Home directory and I've read a good method is to use the tar tool, and I think it suits me well since all I need to do is create a .tar of every folder in the Home directory ...
2
votes
1answer
47 views

Clustering identical files ignoring spaces & linebreaks

Consider a folder with many XML files (10K small text files). Some XML files are identical, some are different. I would like to find out what files are identical (ignoring whitespaces, tabs and ...
7
votes
3answers
5k views

How to pipe md5 hash result in shell

I am looking for a simple way to pipe the result of md5sum into another command. Something like this: $echo -n 'test' | md5sum | ... My problem is that md5sum outputs not only the hash of the ...
2
votes
2answers
129 views

How to use md5sum for checksum with an md5 file which doesn't contain the filename

I have 2 files test.txt and test.txt.md5. I would like to verify the checksum of test.txt. The gnu tool md5sum requires an md5 file with the following format "[md5-hash][space][space][filename]" ...
2
votes
4answers
378 views

Change only one bit in a file

I have to test a hash function and I want to change only a single bit of a specific file. I tried with the dd command. That works, but I can only change a whole byte and not just a bit. sudo dd ...
0
votes
1answer
29 views

how to get the md5sum from a bootable CD/DVD?

AccuHash is a program that can get an md5sum from CD/DVD and without creating an ISO from, but it is a program only running in Windows. I looked around the web for how to do it and there is no ...
9
votes
4answers
3k views

how can a makefile detect whether a command is available in the local machine?

I began to use org-mode for planning out my tasks in GTD-style system. Putting every org files in a directory of a Dropbox folder, I run emacs to edit / manage these files from three different local ...
3
votes
2answers
1k views

How to remove duplicate files using bash

I have a folder with duplicate (by md5sum (md5 on a Mac)) files, and I want to have a cron job scheduled to remove any found. However, I'm stuck on how to do this. What I have so far: md5 -r * | ...
1
vote
1answer
419 views

smd5 - generate by unix tool or perl

I have problem on Unix, have to create a lot of passwords in smd5 but don't know how to generate smd5 passwords using some unix tool or perl in a form: {smd5}DoZgZ.OE$vSg4ZH7Bpy0BCdXNzBj001 I have ...
3
votes
2answers
3k views

How to create a md5-file for every folder in a drive recursivley?

I'm searching for a script which creates a md5 chechsum file for every single folder inside drive recursivley? I do have a copy of md5deep on my machine but I'm not that good in scripting bash.
0
votes
1answer
21 views

Incorrect Md5sum for Opera

I checked the md5sum for the .deb I downloaded from http://www.opera.com/download/guide/?os=linux-i386, and I got 272929c189608dd22a9f61fb0000a365. This number is not listed on ...
0
votes
1answer
37 views

rpm -V inner workings

I have an rpm file that is used to install a package I made the package consists of java classes and shell scripts to run these java classes, in a .run file. So the rpm essentially only contains a ...
21
votes
3answers
3k views

Find a file when you know its checksum?

I have the md5sum of a file and I don't know where it is on my system. Is there any easy option of find to identify a file based on its md5? Or do I need to develop a small script ? I'm working on ...
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votes
2answers
777 views

How to convert SHA to plain text? [closed]

I have found out, how I can convert plain text into an SHA (http://hash.online-convert.com/sha512-generator), but how can I convert a SHA key to plain text?