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This guide goes through setting up secure passwordless SSH connection between a local OSX workstation and a remote server also running a Linux variant. The process requires generating a public and private key on the local computer and then adding the public key to the remote servers authorised list. What is great about this is that it allows a password prompt free session, handy for a lot of uses.
This can be used in both OSX10.10 Yosemite and OSX 10.9 Mavericks.
Turn Off SSH on Mac OS with systemsetup If you want to disable SSH servers from the command line and thereby prevent remote connections, simply switch ‘on’ to ‘off’ with the -setremotelogin flag of systemsetup like so: sudo systemsetup -setremotelogin off Again, sudo is necessary to toggle SSH off and disable the ssh and sftp servers. SiteGround uses key pairs for SSH authentication purposes, as opposed to plain username and password. More information on SSH keys is available here. You can generate an SSH key pair in Mac OS following these steps.
First thing that you need to do on your OSX machine is to create a directory that will store your SSH keys. Then you will generate a public and private key for your account, launch the Terminal and punch in some commands:
Create a .ssh Directory
Change to the home directory
Create a SSH directory name .ssh and move into it
Make sure that the file permissions are set to read/write/execute only for the user
Create your private and public key, the blank quotes at the end of the command gives the private key no password, so allowing for passwordless logins!
Change into the .ssh directory and list the contents of that .ssh directory
Thats your SSH keys created, the private key is the id_rsa and the public one is the id_rsa.pub, don’t give out the private one always keep that one only on your local machine.
Sharing the Public Key
Create an authorized_keys in the .ssh directory of the remote computer that you want to connect to.
You can create automatic logins by adding the contents of your public key to the authorized_keys file on the remote device.
To see and copy your public key use the cat command and copy the contents:
On the remote computer if needed, change the permssions on the authorized_keys file to write to add the public key, on a new line paste in your public key, and change permissions back to read only after for security.
Allow write on authorised_keys
Paste the entire id_rsa.pub content with vi or nano into the authorized_keys file, if using nano use the -w flag to not use incorrect line breaks.
If the remote host does not have an “authorized_keys” file simply create one and after the public key is pasted in don’t forget to takeaway write permissions.
Going Both Ways
So now when you connect via SSH no password is prompted as the remote computer has your public key which is only decrypted by your private key held in your local .ssh/ directory. If you want the communications to be bilateral then repeat the process in the opposite order between the two.
Now the two computers can securely connect with no password prompting, making it ideal to script between the two for file copies or back ups.
Doing it Quicker
Now instead of typing in
Make an alias in your bash shell you could alias it to
Reload the the shell
Then all you have to type in is the alias
![Mac Os X Disable Ssh Key Mac Os X Disable Ssh Key](/uploads/1/2/5/7/125743992/854043864.jpeg)
Related
Before you configure Subversion or Dreamweaver for SVN+SSH, create an RSA key pair and configure the public key on the server. This public/private key pair is used to authenticate with the server, instead of storing and passing your password in plain text. (It is possible to configure SSH without using key pairs; however, Adobe doesn't recommend doing so because of the lack of security.)
To configure the RSA keys, create the private/public RSA key pair on the client computer. Put the public key on the server, and then authorize the key on the server. Adobe also recommends testing the SSH connection afterward to verify that it is configured correctly.
Note: Access to the client computer (that is, the one from which you connect) is required to complete these steps. These steps also require access to the server (for example, directly or via SSH/FTP). On Windows, you need access to an SSH client (for example, TortoiseSVN) and an RSA key generator application (for example PuTTYgen). Mac OS comes with an SSH client and a key generator.
- Input the following command and then press Enter:
ssh-keygen -t rsa - When prompted to save the key, press Enter to select the default location.
- (Optional) Type a passphrase for the key, then press Return/Enter. If you typed a passphrase, then type it again to confirm and press Return/Enter.A confirmation message appears showing that the private and public keys were saved, including their save location and names.
- To copy the public key to the server, input a command like the following, substituting the appropriate AccountName and ServerName:
scp .ssh/id_rsa.pub AccountName@ServerName:~/temp_rsa.pub - Connect to the server via SSH. Input a command like the following, substituting the appropriate AccountName and ServerName:
ssh -l AccountName@ServerName - Type your password when prompted to log in.
Note: If you can log in without being prompted for your password, then your computer/login has already been authorized on the server. Skip the next section and go directly to Test the SSH connection, below.
- Open your RSA key generator application (for example, PuTTYgen).
- Save the private key and the public key. The remaining steps assume that you used the names private_key and public_key, respectively.
- Put your public_key in ~/ using the name temp_rsa.pub on your server (for example, directly or via SSH/FTP).
- Connect to the server via SSH. Assuming that you're using TortoiseSVN, input a command like the following, substituting the appropriate AccountName and ServerName:
tortoiseplink AccountName@ServerName - Type your password when prompted to log in.
Note: If you can log in without being prompted for your password, then your computer/login has already been authorized on the server. Skip the next section and go directly to Test the SSH connection, below.
On the server (for example, directly or via SSH/FTP), complete the following steps:
- Verify that the .ssh folder exists on the server. Input the following command and then press Enter:
ls -al ~/.ssh - Do one of the following:
- If the results of the ls command indicate that the folder does not exist, then create it and then authorize the key on the server. Input the following commands, and press Enter after each one:
mkdir ~/.ssh
mv ~/temp_rsa.pub ~/.ssh/authorized_keys - If the folder exists, then add the key to the server's authorization list. Input the following commands, and press Enter after each one:
cat ~/.ssh/authorized_keys ~/temp_rsa.pub > temp_keys
mv temp_keys ~/.ssh/authorized_keys
- If the results of the ls command indicate that the folder does not exist, then create it and then authorize the key on the server. Input the following commands, and press Enter after each one:
Once you have completed the steps above, test to make sure you can connect to your server via SSH without being prompted for a password.
If you can connect but are still being prompted for a password, repeat the applicable server-side steps above. Consider starting over by creating a key pair on the client, and then repeating the remaining steps.
![Ssh Ssh](https://community-cdn-digitalocean-com.global.ssl.fastly.net/assets/tutorials/images/large/ssh_keys_social.png?1531340291)
Note: When generating keys, be sure to specify the correct number of bits for your server. 2048 bits is fairly common. However, check with your web host if you are not certain.
If you still can't connect without being prompted for a password, see the OpenSSH or your web host for additional assistance.
To configure Subversion to use SSH, add the path to your SSH client and your login information to the Subversion config file.
Note: This information assumes that Windows users are using TortoiseSVN, and that Mac users are using the Mac OS SSH client.
To complete these steps, first open the Subversion configuration file for editing. The config file is in one of the following folders:
- Windows 7 and Vista
C:UsersYour User NameAppDataRoamingSubversionconfig - Windows XP
C:Documents and SettingsYour User NameApplication DataSubversionconfig - Mac OS X
/Users/Your User Name/.subversion/config
- In the Terminal, locate the .subversion folder in your user folder as mentioned above. (Choose Go > Go To Folder in Finder, or use a command like ls -al ~/.subversion in Terminal.)
- The path to SSH is usually '/usr/bin/ssh'. If you are not sure, enter which ssh into Terminal.
- Open the Subversion config file for editing with a text editor (for example, nano, pico, and so on).
For example, enter nano ~/.subversion/config into Terminal. - Enter the following within the tunnels section (underneath [tunnels]):
ssh = $SVN_SSH /usr/bin/ssh
Note: To use key-based authentication, add -i PathToKey. E.g. ssh = $SVN_SSH /usr/bin/ssh -i PathToKey
Alternatively, you can enter the user name and password into this path by adding -l UserName -pw Password. This method is insecure and, therefore, Adobe doesn't recommend it.
- In Windows Explorer, locate the Subversion folder in your user folder as mentioned above.
- Open the file into a plain-text editor, like Notepad.
- In the [tunnels] section, specify where ssh client exists. This location depends on where you installed it.
Open the file and enter the following within the tunnels section (underneath [tunnels]):
ssh = $SVN_SSH C:/PathToSSHClient/tortoiseplink.exe
Note: To use key-based authentication, add -i PathToKey. E.g. ssh = $SVN_SSH C:/PathToSSHClient/tortoiseplink.exe -i PathToKey
Alternatively, you can enter the user name and password into this path by adding -l UserName -pw Password. This mthod is insecure and, therefore, Adobe doesn't recommend it.
- Open your Dreamweaver site definition, and then choose Version Control from the category list.
- Enter your server address in the Server Address field.
- Unless included with in your server address, enter your repository path in the Repository Path field.
- If your server does not use the default SSH port (22), then select Non Default and then enter the Server Port.
- Enter the Username and Password. Leave these fields empty for anonymous login.
Note: The user name and password are NOT taken from Dreamweaver. The only way to send user is to enter AccountName@ServerName in the server name field.
- In the Files panel, choose Local view or Repository view.
- Right-click (Windows) or Ctrl+click (Mac OS) on the root folder to display the menu.
- Select Version Control > Get Latest Versions to update the file list.
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