Questions[hash](ubuntu)

I would like to generate sha256 hash for each log file in a folder and store that hash in a file named by the original file name suffixed with ".sha265" int he same folder. For example, I would like to store the hash for /path/file.ext into /path/file.ext.sha256

I succeed in generating the hashes but fail in creating the .sha256 files. Here is how are generated the hashes :

find /data/dump/ -type f -name "*.log" -exec sha256sum {} \;

Any help would be appreciated ! :)

I tried to install:

• Ubuntu 20.04
• Xubuntu 20.04
• Kubuntu 20.04

But, post install on execute sudo apt-get update, I received the message "Hash Sum mismatch"

What is the problem?

I tried:

apt clean
apt-get clean
rm -rf /var/lib/apt/lists/*

I have ubuntu 16.04 based vms and dockers using mssqlserver driver 17. Installed the classic way

curl https://packages.microsoft.com/keys/microsoft.asc | apt-key add -
curl https://packages.microsoft.com/config/ubuntu/16.04/prod.list > /etc/apt/sources.list.d/mssql-release.list 

sudo apt-get update
ACCEPT_EULA=Y apt-get install msodbcsql17
apt-get -y install unixodbc-dev

Since this morning and an update on microsoft side the apt-get update after adding the repo fails E: Failed to fetch https://packages.microsoft.com/ubuntu/16.04/prod/dists/xenial/main/binary-amd64/Packages.gz Hash Sum mismatch

I followed any lead i could find here (Trouble downloading packages list due to a "Hash sum mismatch" error) to clean apt cache etc. And compared on several machines, either vms, docker containers, even an azure databricks spark instance, same error everywhere so it seems to definitely be an error on the microsoft repo (that, I checked, received an update early this morning).

Is there a way to temporary avoid the hash check to allow my script to bypass that error or am I condemned to wait for M$ to update their repo ?

I'm behind a proxy, and dirmngr doesn't seem to honour the http_proxy rules. So i'm doing these steps

1. download sha256sums.gpg and sha256sums from ubuntuhashes
2. gpg --verify sha256sums.gpg sha256sums
3. The key doesn't exist in my keyring, so i go to the pool.sks-keyservers.net and search for the key 0xD94AA3F0EFE21092. The results: http://pool.sks-keyservers.net:11371/pks/lookup?search=0xD94AA3F0EFE21092&op=vindex
4. the site returns a page with a set of keys and keyIDs. I select the key that resembles 0xD94AA3F0EFE21092 and copy this pgp key block into a file
5. gpg --import returns an invalid packet, read block error.

How do i resolve this error? On my system the apt-key list shows a similar signing key, so importing this from the /etc/apt/trusted.gpg.d/ubuntu-keyring-2012-cdimage.gpg, i'm able to verify the ubuntu hashes. On the other hand, verifying a file with a key that is distributed with the release doesn't make sense. Using the pgp key that is returned from the sks-keyservers should be the preferred method.

Also, the web search on pool.sks-servers.net returns a page that is not https by default. Is it de rigeur to return results to keys using http?

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.