debian-mirror-gitlab/doc/development/gitlab_shell/features.md

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GitLab Shell feature list

Discover

Allows users to identify themselves on an instance via SSH. The command helps to confirm quickly whether a user has SSH access to the instance:

ssh git@<hostname>

PTY allocation request failed on channel 0
Welcome to GitLab, @username!
Connection to staging.gitlab.com closed.

When permission is denied, it returns:

ssh git@<hostname>
git@<hostname>: Permission denied (publickey).

Git operations

GitLab Shell provides support for Git operations over SSH by processing git-upload-pack, git-receive-pack and git-upload-archive SSH commands. It limits the set of commands to predefined Git commands:

• git archive
• git clone
• git pull
• git push

Generate new 2FA recovery codes

Enables users to generate new 2FA recovery codes:

$ ssh git@<hostname> 2fa_recovery_codes

Are you sure you want to generate new two-factor recovery codes?
Any existing recovery codes you saved will be invalidated. (yes/no)
yes

Your two-factor authentication recovery codes are:
...

Verify 2FA OTP

Allows users to verify their 2FA one-time password (OTP):

$ ssh git@<hostname> 2fa_verify

OTP: 347419

OTP validation failed.

LFS authentication

Enables users to generate credentials for LFS authentication:

$ ssh git@<hostname> git-lfs-authenticate <project-path> <upload/download>

{"header":{"Authorization":"Basic ..."},"href":"https://gitlab.com/user/project.git/info/lfs","expires_in":7200}

Personal access token

Enables users to use personal access tokens via SSH:

$ ssh git@<hostname> personal_access_token <name> <scope1[,scope2,...]> [ttl_days]

Token:   glpat-...
Scopes:  api
Expires: 2022-02-05