Questions tagged [md5]
The md5 tag has no usage guidance.
43
questions
71
votes
20
answers
213k
views
How to create an SHA-512 hashed password for shadow?
The previous SF questions I've seen have lead to answers that produce MD5 hashed password.
Does anyone have a suggestion on to produce an SHA-512 hashed password? I'd prefer a one liner instead of a ...
- 10.9k
33
votes
10
answers
46k
views
Calculate MD5 checksum of a directory
I'm looking for a quick way to compare directory contents. Is it possible to do an md5sum (or equivalent checksum) of an entire directory?
Using Ubuntu Linux
- 2,820
22
votes
2
answers
3k
views
Why are md5 passwords hashed differently?
I've been wondering for a while, why does running "echo 'helloworld' | openssl passwd -1 -stdin" yield different results every time?If I put any of the hashes in my /etc/shadow I can use them as my ...
- 1,102
18
votes
4
answers
17k
views
Different md5sums for same tar contents
I run a test creating two tars from the same dir (its files remained unchanged), and I found that their md5sums were different. I assume there's some timestamp being included in the tar's header, but ...
- 677
11
votes
3
answers
3k
views
Windows 2012 R2 - Search for Files using MD5 Hash?
My organization recently discovered malware that was sent to some users via email that managed to get past our email security in a sophisticated, targeted attack. The names of the files vary from user ...
- 221
10
votes
3
answers
12k
views
vsftpd will not accept passwords encrypted with MD5
I am setting up an server with vsftpd to let virtual users access their space. Now it is fully working but only with CRYPT passwords. So
sudo htpasswd -c /etc/vsftpd/ftpd.passwd phpmyadmin
will not ...
- 307
7
votes
1
answer
8k
views
Securing NTP: which method to use?
Can someone good at NTP configuration please share which method is the best/easiest to implement a secure, tamper-proof version of NTP? Here are some difficulties...
I don't have the luxury of having ...
- 403
6
votes
1
answer
7k
views
Does AWS cli do a data integrity check on sync with s3? [closed]
I've been looking into using AWS cli for data integrity checks to verify a backup has been transferred from a Linux file server correctly to AWS s3. Likewise, I would like to verify when restoring a ...
- 965
6
votes
1
answer
5k
views
LDAP passwords encryption (userPassword attribute)
I'm trying to import passwords from an LDAP to a MySQL database. When I look at the userPassword attribute for the known password test I get this:
userPassword:: ...
- 3,523
5
votes
4
answers
9k
views
Is it secure to encrypt my POST variables to md5 before sending them?
I have a simple login form where a user enters their username and password. When php receives the vars via POST, it encrypts the password to md5, then compares it with the database records.
My ...
- 51
5
votes
5
answers
2k
views
md5sum of large files gives different results sometimes
I have an AMD quad core, 8 gb RAM, 1 SSD EXT2 (2 months old), 2 HDD EXT4, approximately 1 year old.
I'm using Ubuntu 10.04 x86-64 and when I compute the md5sum of large files (9 GB) sometimes I get ...
- 203
4
votes
2
answers
4k
views
Can "tar" backup incrementally?
I have my home folder with a few GB.
Is it possible to run tar on it, create a home.tar.gz, and then for changed files, it creates home1.tar.gz only with modified files from previous tar (thus being ...
4
votes
2
answers
777
views
Different md5sum on 2 NFS clients
2 machines are mounting the same NFS folder(which is on a single 3rd machine).
Files get uploaded from either client server to this mount, usually in chunks. Server A might handle a chunk, then ...
- 273
4
votes
3
answers
4k
views
Can I force the passwd command to use MD5 hash (and not crypt)?
How can I force the passwd command to use MD5 hash and not to use crypt? I need to get the passwd command to talk to the ldap server (which it does) and use MD5 when I change passwords for the users.
- 135
3
votes
2
answers
6k
views
changing shadow hash algorithm to bcrypt: how to rehash
I want to change my SHA512 shadow file to use bcrypt as shown in this question/answer: Enable blowfish-based hash support for crypt
The problem is that i run into a chicken and egg problem, because ...
- 239
3
votes
5
answers
9k
views
Is there any value in checking MD5 of files after they have been unzipped?
A project I am working on currently requires that the user runs an MD5 hash checking tool on the entire project, after it has been unzipped. They do not currently request that the ZIP itself is ...
- 133
2
votes
2
answers
2k
views
Migrate user and passwords to new linux box
I am trying to migrate old Centos 4.3 box to Centos 7.
I have followed the migration steps from an article published way long back on http://www.cyberciti.biz/faq/howto-move-migrate-user-accounts-old-...
- 197
2
votes
1
answer
2k
views
Check all debian binaries against the checksum of the original
I would like to check all binaries on my server against
dpkg -e <path_to_deb_package> <destination>
(for example rkhunter could do this check against the originals when doing probupdate)...
- 2,529
2
votes
2
answers
779
views
Software to brute force MD5 password on multi-core machine? [closed]
First off, I'm well aware that this is a controversial topic. I can give my word as a sysadmin that I have the best of intentions (depending on how you view the next paragraph) but I understand that ...
- 1,536
2
votes
1
answer
420
views
debsum and actual md5
I have discovered that debsum maybe does not work as i thought.
I ran
debsum -as
And actually i did not see sshd binary in that list.
However md5 of the /usr/sbin/sshd file and the numbers given ...
- 21
1
vote
1
answer
843
views
md5sum returns different results for a folder, but why?
/tmp/file.txt
tar cvf 1.tar tmp
md5sum 1.tar
c32dc6f04ff02b371129dd4aa923cc12
rm 1.tar
cd tmp
touch test.txt
rm test.txt
cd ..
tar cvf 1.tar tmp
md5sum 1.tar
f9204f04ff02b300130ee4aa234aa78
i dont ...
- 506
1
vote
1
answer
988
views
Creating an MD5 file for a directory tree for only a given extension
I would like to create an MD5 file of a directory tree, containing only the bare names of the files. md5deep exactly does that, but it cannot filter for files when in recursive mode.
md5deep -rb . &...
- 711
1
vote
1
answer
1k
views
How to generate a Linux Apache password file on a PC running Windows 7?
My development machine is Windows. I use the htpasswd program that is part of the Windows XAMPP package, version 1.7.7, to generate a Windows Apache password file.
C:\xampp\apache\bin\htpasswd.exe -...
- 261
1
vote
0
answers
391
views
RPM --queryformat FILEMD5S checksum is different than md5sum of machine
The RPM man page says:
The FILEMD5S Tag The FILEMD5S tag is used to display the MD5 checksum
for each of the files that comprise the package.
Array: Yes (Size: One entry per filemd5s)
Used with ...
1
vote
0
answers
796
views
MD5 hash comparison over SMB SLOW
I'm scripting a full backup solution in powershell on Windows server 2016 for Hyper-V VM's and have run into the issue that calculating the MD5 hash over the network on a mounted network drive across ...
- 250
1
vote
1
answer
3k
views
Password mismatch in dovecot with postafixadmin
After many hours trying to set up a new mail server, I just can't figure out why the passwords which postfixadmin store are a mismatch with what dovecot passes for authentication.
In postfixadmin, ...
- 363
0
votes
2
answers
4k
views
How can I ensure non-corrupt file transfer in linux?
I have script scheduled with cron that transfers a file around to other machines using scp filename user@host:~ and today have noticed that sometimes the md5 of the files don't match. Upon closer ...
- 325
0
votes
3
answers
2k
views
Puppet - MD5 sum of string
I would like to name a file based on a MD5 sum of certain characters. Such as $environment and $URL. So from a high-level what I'd want is something like md5("http://$environment/$url").
Does anyone ...
0
votes
2
answers
2k
views
Secure link depending only on directory name?
I am currently struggling to make nginx secure just folder name, dependlessly what the file name inside of it is. Let's say, I'm accessing a file in a folder /one/two/three, it would look like this:
...
- 35
0
votes
2
answers
3k
views
Change password hashing algorithm for SuSE users from blowfish to MD5
I have a network of roughly 1000 SuSE machines with 20-200 users on each. The password hashing algorithm used is the default i.e. blowfish. In order to check, whether a user has used a dictionary word ...
0
votes
2
answers
795
views
HOw to know if files md5 chnaged by virus or system itself centos
I installed OSSSEC to very files have chnaged or not.
But sometimes it is giving me false waring and integrity checksums like following files have chnaged.
How can i makesure that files are chnaged ...
John
0
votes
2
answers
889
views
Ubuntu - Is there any programme for MD5 rainbowtables on Ubuntu?
I've been reading about Rainbow Tables recently. There's a few webpages that will do a reverse look up for an MD5 hash. Is there any programme on Ubuntu that lets me do this? Is there something in ...
- 31.7k
0
votes
1
answer
76
views
Two salts, One password [closed]
If I have two different MD5 password hashes with two different salts (the salts are known), is there any way to cryptographically deduce if the two passwords match? Other than brute force password ...
- 386
0
votes
2
answers
2k
views
Moving a 13 gig file over sFTP (md5sum fails)
Each time I download a big file over sftp, the md5sum on the source machine doesn't match the md5sum I do on the destination machine.
I have a 13gig file on an Ubuntu 12.04 machine with openssh-...
- 1,508
0
votes
2
answers
259
views
Prompt server for Etag or MD5
We are a price comparison portal and crawl certain websites on a regular basis. I am looking for a method to save bandwidth by avoiding downloading the same page over and over again if the content did ...
- 139
0
votes
1
answer
927
views
check MD5 checksums from md5 file in Windows
Hopefully a simple question, does a simple Windows command line equivalent to md5sum --check [files.md5] exist? Alternatively, something I can script as a batch file.
I can generate the hashes file ...
- 1
0
votes
1
answer
101
views
Linux md5 checksum issue
I have a directory in which thousands of directories are present. I need to get md5sum of only around 60 directories from this list of thousands of directories.
How do I selectively run the md5 on a ...
0
votes
1
answer
239
views
NGINX secure_link returning 403
I´m using the following serve block to serve some mp4 files using NGINX secure link.
server {
listen 80;
listen [::]:80;
root /var/www/cdn;
index index.html index.php ...
0
votes
1
answer
95
views
Removing old files from home directories
I need to find and remove files older than 2 weeks from the home directories of my cluster.
I do not want to let people just "touch" the file to change the modification date and keep it for ...
- 1
0
votes
1
answer
1k
views
Compute and update the md5 hash after the fact
So... I just realized that the utility I’ve been using to upload data to azure blobs has only been setting content-md5 hashes for the small files, leaving the larger (more important) files without a ...
0
votes
0
answers
234
views
configuring MD5 bgp authentication on solaris 11 using quagga
I am attempting to configure a BGP router within a solaris zone, using dedicated network interfaces. Upstream provider insists on the use of MD5 authentication.
I have no bgp sessions coming up. I ...
- 255
-1
votes
1
answer
134
views
MD5 for Git's git-credential-osxkeychain executable? [closed]
This question copied over from Super-User, where it was apparently unwelcome. Anyway, asked and answered:
I'm setting up a GitHub account and have downloaded Git's git-credential-osxkeychain ...
github
-2
votes
1
answer
467
views
Understanding linux /etc/shadow file structure (Linux) [closed]
Consider the following line taken from /etc/shadow file:
root:$1$NFEf74q.$bmukkxAq9dOMJINgEtP7u0:15258:0:::::
From this I understand that the hashing algorithm is md5 ($1) and starting from third $ ...
- 109