两台配置一致的Ubuntu笔记本无法从本地主机执行git clone求助

Alright, let's troubleshoot your git clone problem step by step—since you’ve already got matching SSH/Git configs and RSA keys across both Ubuntu laptops, we can narrow down the likely culprits quickly. Here’s what to check:

Git over SSH depends entirely on a working SSH connection, so start here to rule out the foundation:

• Test basic SSH access from your local host:

  ssh system1
  

  If this fails, SSH is the root issue. Dig deeper with these checks:
  • Lock down .ssh directory and key permissions (SSH rejects overly permissive files):
    On both your local host and system1, run these commands to set correct permissions:

    chmod 700 ~/.ssh
    chmod 600 ~/.ssh/id_rsa_common
    chmod 644 ~/.ssh/config
    

  • Confirm your IdentityFile path is correct:
    Double-check that ~/.ssh/id_rsa_common exists on your local host (even if keys are identical, a typo in the filename will break things).
  • Get verbose SSH logs for debugging:
    Run this to see exactly where SSH is failing:

    ssh -v system1
    

    Look for lines like "Permission denied" or "No such identity" to pinpoint the issue.

If SSH works, next confirm the repo itself is accessible:

• Verify the repo exists on system1 and has proper permissions:
  Log into system1, then check the repository path (e.g., if you’re cloning ssh://system1/path/to/repo.git):

  ls -al /path/to/repo.git
  

  Make sure user1 has read access to the repo directory and all its contents.
• Test cloning with an absolute path:
  From your local host, try cloning using the full system path to rule out relative path confusion:

  git clone system1:/absolute/path/to/your/repository.git
  

Even though you said configs are identical, quick checks won’t hurt:

• Confirm global Git user settings are correctly applied:

  git config --list --global
  

  (Note: These usually affect commits, not cloning, but it’s good to eliminate variables.)

• Check system1’s firewall allows SSH:
  On system1, verify SSH is permitted (Ubuntu uses ufw by default):

  sudo ufw status
  

  If SSH isn’t listed, allow it with sudo ufw allow ssh.
• Confirm system1’s IP is reachable:
  Ping the IP from your local host to ensure network connectivity:

  ping <system1_ip>
  

  If ping fails, you’ve got a network routing issue separate from SSH/Git.

Once you work through these steps, you’ll likely spot where the breakdown is. Let me know which step hits an error, and we can dive deeper!

内容的提问来源于stack exchange，提问作者orionlin