Reputation: 9259

Git Remote: Error: fatal: protocol error: bad line length character: Unab

I set up a git server and want now to push initially my repo from the client. I used git push origin master and get this error message:

fatal: protocol error: bad line length character: Unab

I don't know what's wrong. I don't know what "Unab" is. I tried to resize the shell but it is still "Unab". I cannot find a solution for this error message.

I setup the server with "authorized_keys" and SSH. (I can connect to it, using SSH.)

It seems to be a git problem?

BTW: The server is set up in a Windows 7 VM

Upvotes: 159

Answers (30)

user1719210

Reputation: 318

In my case, from GIT windows to a remote GIT on pi raspberry server, using this command:

GIT_SSH_COMMAND="ssh -p 22" git push origin master

instead of

git push origin master

solved the problem

Upvotes: 0

Tito

Reputation: 9044

Late answer here, but hope it will help someone. If its a protocol error, it has to do something with your local git not able to communicate to the remote git. This can happen if you cloned the repo via ssh and sometime later, you lost the keys to the repo or your ssh agent cannot find those keys anymore.

Solution

Generate a new key and add it your git repo or configure your ssh agent to load the keys if you still have the keys with you & not with someone else ;)
Another quick fix is to go to your .git directory and edit the config file's [remote "origin"] url from git@... to http... so that ssh keys are not needed to push and it will revert to asking your username and password.
```
[remote "origin"]
url   = git@gitlab.*****.com:****/****.git
fetch = +refs/heads/*:refs/remotes/origin/*
```
Change to
```
[remote "origin"]
url   = http://gitlab.*****.com/****/****.git
fetch = +refs/heads/*:refs/remotes/origin/*
```

Upvotes: 0

Mark

Reputation: 624

I too had this issue...

fatal: protocol error: bad line length character: fata

What resolved my issue was updating GIT...

$ brew upgrade git

Upvotes: 1

Ashrik Ahamed

Reputation: 445

If any one has changed the buffer size, then this is for you, this line of command will reset it :

git config --global http.postBuffer 1048576

Upvotes: 3

Bence Musa

Reputation: 17

I know this is a rather old thread but when I had a very similar error message, I only got hints from this posts to investigate around SSH. I forgot that I put up an sshrc with an "echo" in it to test. So if you are running some form of UNIX, and get this error, then try looking into the following files:

/etc/sshrc: runs for any user login
~/.ssh/rc: runs for a specific user login

If these scripts have stdout then I think it can confuse the SSH key exchange process. At least it did it for me. Removing the echoes lines fixed my issue.

Upvotes: 0

Silviu

Reputation: 123

Had some similar issue but git fatal: protocol error: bad line length character: Cann and I was not able getting rid of it until I got rid of all the plink.exe dependency (have installed the Putty via choco installer) but also removed the next line from the .gitconfig file sshCommand = plink -batch.

Upvotes: 1

Zhang Yu

Reputation: 669

In my case, the issue is caused by a modified /bin/ssh. I work on a server with other people and the default /bin/ssh is somehow modified, it outputs unintended logs when starting. I restore the /bin/ssh to the correct executable and solved it.

Upvotes: 0

Karthik N

Reputation: 69

I had same problem when I did git pull

git pull fatal: protocol error: bad line length character: <htm fatal: the remote end hung up unexpectedly

I changed my remote url HTTP to SSH, and it worked for me.

git remote set-url origin "HTTP" to "SSH"

Upvotes: 0

jlh

Reputation: 4677

TL;DR: Do not omit username@ in your remote URLs when on Windows.

On Linux and on Windows with the default ssh, you can omit the username from remote URLs, like so:

git clone server-name:/srv/git/repo-name

Because ssh's default behavior is to just use whatever username you're currently logged in with. If you're on Windows and have set up git to use plink.exe so that you can use the key loaded in your pageant, then this will not work, because plink does not have this same automatic username behavior, resulting in those cryptic error messages, because it will prompt for the username:

$ plink server-name
login as: _

Versus:

$ plink username@server-name
...logs you in...

If you already cloned a repository somehow you can fix the remotes in your .git/config by adding the username@ to the remote URL.

Upvotes: 5

Developer Marius Žilėnas

Reputation: 6119

If you use Putty. Then make sure to have Pageant running and your private key is loaded in Pageant (mouse right-click on Pageant icon on the Taskbar and click "View keys" on the menu that pops up).

Otherwise when you do in cmd.exe :

git clone ssh://name@host:/path/to/git/repo.git

you get this message "fatal: protocol error: bad line length character:"

Upvotes: 4

Amit Shah

Reputation: 8179

For GitExtension users:

I faced the same issue after upgrading git to 2.19.0

Solution:

Tools > Settings > Git Extensions > SSH

Select [OpenSSH] instead of [PuTTY]

Upvotes: 42

CoolMind

Reputation: 28793

In my case after fetch it was written: fatal: protocol error: bad line length character: Pass. Also after push I got: fatal: protocol error: bad line length character: git@ Done.

After reboot of Windows I had to start "PuTTY agent" (pageant.exe) again and add a private key that disappeared from a list of keys.

Upvotes: 5

Hakaishin

Reputation: 2932

Changing the ssh exectuable from builtin to nativ under settings/version control/git did the trick for me.

Upvotes: 0

Val

Reputation: 21

I had the same error "fatal: protocol error: bad line length character: shmi" Where the shmi is user name in my case. I switched SSH from PuTTY to OpenSSH in "Git Extensions->Settings->SSH". It helped.

Upvotes: 2

David Aleu

Reputation: 3942

For me adding the same host details into Putty with the private key (convert with puttygen) worked. Any git bash commands after that had no problems.

Upvotes: 1

Shoonya

Reputation: 128

Git doesn't prompt for password and fails with similar cryptic message "fatal: protocol error: bad line length character: user" if you don't have your private key authentication setup as well.

https://www.digitalocean.com/community/tutorials/how-to-configure-ssh-key-based-authentication-on-a-linux-server tells how to specify public key on the server. Basically add the public key to ~/.ssh/authorized_keys or ~/.ssh/authorized_keys2

I had to struggle a bit on how to provide private key to the Git Bash on the windows machine. Dan McClain's answer in https://serverfault.com/questions/194567/how-do-i-tell-git-for-windows-where-to-find-my-private-rsa-key/382801#382801 describes that. One addition to his answer, in my case the private key file was expected to be named id_rsa.pub

Upvotes: 1

Nikolai Koudelia

Reputation: 2639

In my case the problem was 32-bit Putty and pageant.exe - it can't communicate with 64-bit TortoisePlink.exe. Replacing 32-bit Putty with a 64-bit version solved the problem.

Upvotes: 2

Edward Thomson

Reputation: 78673

This error message is a bit obtuse, but what it's actually trying to tell you is that the remote server didn't reply with a proper git response. Ultimately, there was a problem on the server running the git-receive-pack process.

In the Git protocol, the first four bytes should be the line length. Instead, they were the characters Unab... which is probably the beginning an error message of some kind. (ie, it's probably "Unable to..." do something).

What happens when you run ssh <host> git-receive-pack <path-to-git-repository>? You should see the error message that your git client is barfing on and you may be able to correct it.

Upvotes: 142

MaeseDude

Reputation: 451

I had the same kind of problem after installing GIT on Windows. At first it worked; then, a day later (after a PC reboot), it didn't anymore, and I got this:

$ git pull
fatal: protocol error: bad line length character: git@

The problem was that after the reboot, the automatically started Putty "pageant.exe" didn't have the private key active anymore. When you add a key in pageant, it's not a persistent setting by default. I just had to add the key again, and it worked fine. So, for that case, it's necessary to make pagenant load the key automatically, as discussed here:

https://www.digitalocean.com/community/tutorials/how-to-use-pageant-to-streamline-ssh-key-authentication-with-putty

Upvotes: 33

acveer

Reputation: 380

This might help someone. When I was trying to clone a project from an EC2 instance, I was getting the below error:

Cloning into 'repo1'...
fatal: protocol error: bad line length character: logi

The resolution for me includes the below steps:

Ensure SSH key (public) is added/updated in the EC2 instance.
Ensure authentication agent (in my case its Pageant=Putty Authentication Agent) is running and the corresponding private key is loaded.
Use the EC2 SSH key ID for the public key for git clone. Example:

git clone ssh://{SSH Key ID}@someaccount.amazonaws.com/v1/repos/repo1

Upvotes: 5

Thu 01 Jan 1970 000000 GMT

Reputation: 557

For me it was becuase I recently added

RequestTTY force

into .ssh/config

commenting this out allowed it to work

Upvotes: 6

Philipp Klemeshov

Reputation: 413

Well, I had this same issue (Windows 7). Try to get repo by password. I use Git Bash + Plink (environment variable GIT_SSH) + Pageant. Deleting GIT_SSH (temporary) helps me. I don't know why I can't use login by pass and login with RSA at the same time...

Upvotes: 0

Mohanakrrishna

Reputation: 168

you can always have http link to your git project. You can use that instead of ssh link. This is just an option you have

Upvotes: 0

Kevin Davis

Reputation: 365

It could be a security access on your machine, are you running Pageant (which is a putty agent)?

Upvotes: 0

janos

Reputation: 124646

I had similar issue, but the exact error message was:

fatal: protocol error: bad line length character: Usin

This is in Windows, with GIT_SSH set to the path of plink.exe of PuTTY.

Possible problems and solutions:

Make sure the path to plink.exe is correct. Unix style path works fine too, for example /c/work/tools/PuTTY/plink.exe
Make sure the key agent of PuTTY (pageant.exe) is running
Make sure the key agent contains a valid key to access the server

Upvotes: 78

Stanley Emmanuel

Reputation: 181

After loading the SSH private key in Git Extensions, this issue gets resolved.

Upvotes: 15

syclee

Reputation: 697

I had a similar problem on Windows using Git Bash. I kept getting this error when trying to do a git clone. The repository was on a Linux box with GitLab installed.

git clone git@servername:path/to/repo
fatal: protocol error: bad line length character: git@

I made sure the ssh key was generated. The public key was added on GitLab. The ssh-agent was running and the generated key was added (github link).

I ran out of options and then finally tried closing Git Bash and opening it again by right clicking 'Run as Administrator'. Worked after that.

Upvotes: 7

jamshid

Reputation: 1775

FYI I got this same error message after I upgraded a CentOS6 container to CentOS7 -- some git operations started failing when building the container, e.g.

# git remote show origin
fatal: protocol error: bad line length character: Inva

Running ssh gave me an error I could search on:

# ssh [email protected]
Invalid clock_id for clock_gettime: 7

That led me to https://github.com/wolfcw/libfaketime/issues/63 where I realized I had forgotten I had a LD_PRELOAD=/usr/local/lib/faketime/libfaketime.so.1 in a parent Dockerfile. Commenting that out fixed the error.

Upvotes: 2

bonbon.langes

Reputation: 1818

i also encounter that error once in a while, but when it does, it means that my branch is not up-to-date so i have to do git pull origin <current_branch>

Upvotes: 2

ConfusedDeer

Reputation: 3415

The following may help someone: When trying to clone a project I have on my AWS EC2 instance I was getting the following error:

Cloning into 'AWSbareRepo'...
fatal: protocol error: bad line length character: Plea

This was caused by trying to ssh as root instead of EC2-USER. if you actually ssh without doing a git clone... you will see the error msg in something along the lines of "Please login with ec2-user" Once I did a git clone as a ec2-user it was good.

Upvotes: 1

Git Remote: Error: fatal: protocol error: bad line length character: Unab

Answers (30)

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