{"id":4955,"date":"2023-12-04T11:18:03","date_gmt":"2023-12-04T19:18:03","guid":{"rendered":"https:\/\/SUMMALAI.COM\/?p=4955"},"modified":"2023-12-04T11:18:04","modified_gmt":"2023-12-04T19:18:04","slug":"how-to-connect-a-linux-instance-on-oracle-cloud","status":"publish","type":"post","link":"https:\/\/SUMMALAI.COM\/?p=4955","title":{"rendered":"How to Connect a Linux Instance on Oracle Cloud"},"content":{"rendered":"\n

You connect to a running Linux instance by using a Secure Shell (SSH) connection.<\/p>\n\n\n\n

The steps to connect to a Linux instance vary, depending on the operating system that you’re connecting from.<\/p>\n\n\n\n

Most UNIX-style systems include an SSH client by default. Windows 10 and Windows Server 2019 systems should include the\u00a0OpenSSH client<\/a>, which you need if you created your instance using the SSH keys generated by\u00a0Oracle Cloud Infrastructure. For other Windows versions, you can download a free SSH client called PuTTY from\u00a0http:\/\/www.putty.org<\/a>.<\/p>\n\n\n\n

Connecting to a Linux Instance from a Windows System Using OpenSSH<\/h2>\n\n\n\n

If the instance uses a key pair that was generated by Oracle Cloud Infrastructure, then use the following procedure.<\/p>\n\n\n\n

  1. If this is the first time you are using this key pair, then you must set the file permissions so that only you can read the file. Do the following:
    1. In Windows Explorer, navigate to the private key file, right-click the file, and then click Properties<\/strong>.<\/li>
    2. On the Security<\/strong> tab, click Advanced<\/strong>.<\/li>
    3. On the Permissions<\/strong> tab, for Permission entries<\/strong>, under Principal<\/strong>, ensure that your user account is listed.<\/li>
    4. Click Disable Inheritance<\/strong>, and then select Convert inherited permissions into explicit permissions on this object<\/strong>.<\/li>
    5. For Permission entries<\/strong>, select each permission entry that is not your user account and click Remove<\/strong>.<\/li>
    6. Ensure that the access permission for your user account is Full control<\/strong>.<\/li>
    7. Save your changes.<\/li><\/ol><\/li>
    8. To connect to the instance, open Windows PowerShell and run the following command: Note<\/strong>Copy the following example to ensure the correct characters are used. If the wrong character is used in ssh -i<\/code>, an error such as Could not resolve hostname ...: No such host is known<\/code> might occur.Copyssh -i <private_key_file><\/var> <username><\/var>@<public-ip-address><\/var><\/code><private_key_file><\/var> is the full path and name of the .key<\/code> file that contains the private key associated with the instance you want to access.<username><\/var> is the default username for the instance. For Oracle Linux and CentOS images, the default username is opc<\/code>. For Ubuntu images, the default username is ubuntu<\/code>.<public-ip-address><\/var> is the instance’s IP address that you retrieved from the Console.<\/li>
    9. If you’re connecting to this instance for the first time, you need to accept the fingerprint of the key. To accept the fingerprint, type yes<\/strong> and press Enter<\/strong>.<\/li><\/ol>\n\n\n\n

       Note<\/strong><\/p>\n\n\n\n

      For SSH troubleshooting suggestions, see Troubleshooting the SSH Connection<\/a>.<\/p>\n\n\n\n

      Connecting to a Linux Instance from a Windows System Using PuTTY<\/h2>\n\n\n\n

      SSH private key files generated by Oracle Cloud Infrastructure are not compatible with PuTTY. If you use a private key file that was generated during the instance creation process, you must convert the file to a .ppk<\/code> file before you can use it with PuTTY to connect to the instance.<\/p>\n\n\n\n

       Note<\/strong><\/p>\n\n\n\n

      If you changed the file permissions on the key to connect from a Windows system using OpenSSH, then the key will not work with a PuTTY connection. Use OpenSSH to connect instead<\/a>.<\/p>\n\n\n\n

      Convert a generated .key private key file:<\/strong><\/p>\n\n\n\n

      1. Open PuTTYgen.<\/li>
      2. Click Load<\/strong>, and select the private key that was generated when you created the instance. The extension for the key file is .key<\/code>.<\/li>
      3. Click Save private key<\/strong>.<\/li>
      4. Specify a name for the key. The extension for new private key is .ppk<\/code>.<\/li>
      5. Click Save<\/strong>. Note<\/strong>PuTTYgen does not overwrite the .key<\/code> file but creates an additional file of the same name with the .ppk<\/code> extension.<\/li><\/ol>\n\n\n\n

        Connect to the Linux instance using a .ppk private key file:<\/strong><\/p>\n\n\n\n

        If the instance uses a key pair that you created using PuTTY Key Generator, use the following procedure.<\/p>\n\n\n\n

        1. Open PuTTY.<\/li>
        2. In the Category<\/strong> pane, select Session<\/strong> and enter the following: