How To Set Up SSH Keys - Revision history

Barbeda at 02:04, 3 September 2023

2023-09-03T02:04:12Z

← Older revision		Revision as of 02:04, 3 September 2023
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	user$ cat ~/.ssh/id_rsa.pub \| ssh user@remote.host "cat >> ~/.ssh/authorized_keys"		user$ cat ~/.ssh/id_rsa.pub \| ssh user@remote.host "cat >> ~/.ssh/authorized_keys"

			After you've succsessfully copied over the SSH key, you should be able to ssh directly into the remote server with

			ssh user@remote.host

			(user is still your username, and remote.host is still the server you're trying to access, like bowie.cs.earlham.edu)

	3. Create a config file (Optional)		3. Create a config file (Optional)

Barbeda at 01:22, 3 September 2023

2023-09-03T01:22:45Z

← Older revision		Revision as of 01:22, 3 September 2023
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	user$ cat ~/.ssh/id_rsa.pub \| ssh user@remote.host "mkdir -p ~/.ssh && chmod 700 ~/.ssh && cat >> ~/.ssh/authorized_keys"		user$ cat ~/.ssh/id_rsa.pub \| ssh user@remote.host "mkdir -p ~/.ssh && chmod 700 ~/.ssh && cat >> ~/.ssh/authorized_keys"

	Note that, user@remote.host should be replaced with appropriate terms.		Note that, user@remote.host should be replaced with appropriate terms. If you already have an .ssh directory on the remote host, you just need:

			user$ cat ~/.ssh/id_rsa.pub \| ssh user@remote.host "cat >> ~/.ssh/authorized_keys"

	3. Create a config file (Optional)		3. Create a config file (Optional)

Ttphan21 at 21:17, 5 February 2023

2023-02-05T21:17:51Z

← Older revision		Revision as of 21:17, 5 February 2023
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	On the local machine:		On the local machine:
	* ssh-keygen -t rsa and/or ssh-keygen -t dsa		* ssh-keygen -t rsa and/or ssh-keygen -t dsa
	* ssh-~~copyid~~ -i ~/.ssh/id_rsa.pub user@remote.host and/or dsa		* ssh-copy-id -i ~/.ssh/id_rsa.pub user@remote.host and/or dsa
	* test with ssh user@remote.host		* test with ssh user@remote.host

	Tested and working 2022		Tested and working 2022

Ttphan21 at 21:51, 12 November 2022

2022-11-12T21:51:30Z

← Older revision		Revision as of 21:51, 12 November 2022
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	* ssh-copyid -i ~/.ssh/id_rsa.pub user@remote.host and/or dsa		* ssh-copyid -i ~/.ssh/id_rsa.pub user@remote.host and/or dsa
	* test with ssh user@remote.host		* test with ssh user@remote.host

			Tested and working 2022

Charliep at 09:27, 5 September 2022

2022-09-05T09:27:03Z

← Older revision		Revision as of 09:27, 5 September 2022
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	=== SSH Key Setup ===		=== SSH Key Setup ===

	1. Create the RSA key pair		1. Create the RSA key pair on your machine (laptop, desktop, etc.):
	user$ ssh-keygen -t rsa -b 4096		user$ ssh-keygen -t rsa -b 4096

Charliep at 17:12, 13 August 2021

2021-08-13T17:12:20Z

← Older revision		Revision as of 17:12, 13 August 2021
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	Press enter for all questions to keep the defaults. You may change the defaults, but it is preferred not to. Also, it is common to leave the passphrase empty. The entire point of ssh keys is to make login easier and faster, and passphrase defeats the purpose, I believe. With defaults, your public key will be saved in ~/.ssh/id_rsa.pub and private key will be saved in ~/.ssh/id_rsa file.		Press enter for all questions to keep the defaults. You may change the defaults, but it is preferred not to. Also, it is common to leave the passphrase empty. The entire point of ssh keys is to make login easier and faster, and passphrase defeats the purpose, I believe. With defaults, your public key will be saved in ~/.ssh/id_rsa.pub and private key will be saved in ~/.ssh/id_rsa file.

	2. Copy the public id to remote host.		2. Copy the public id to remote host (for most people this will be user@bowie.cs.earlham.edu or user@cluster.earlham.edu).
	user$ ssh-copy-id user@remote.host		user$ ssh-copy-id user@remote.host

Charliep at 15:41, 12 March 2021

2021-03-12T15:41:31Z

← Older revision		Revision as of 15:41, 12 March 2021
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	HostName remote.host.3		HostName remote.host.3
	User username		User username

			=== SSH key setup when the usernames are not the same ===
			On the local machine:
			* ssh-keygen -t rsa and/or ssh-keygen -t dsa
			* ssh-copyid -i ~/.ssh/id_rsa.pub user@remote.host and/or dsa
			* test with ssh user@remote.host

Craigje at 14:32, 27 August 2019

2019-08-27T14:32:56Z

← Older revision		Revision as of 14:32, 27 August 2019
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	Host $hostname_you_want_to_use		Host $hostname_you_want_to_use
	HostName $complete_hostname		HostName $complete_hostname
	User $username		User $username

	$ sign indicates variable, so you should replace your username with $username, and you can use tools in place of $hostname_you_want_to_use, tools.cs.earlham.edu in place of $complete_hostname.		$ sign indicates variable, so you should replace your username with $username, and you can use tools in place of $hostname_you_want_to_use, tools.cs.earlham.edu in place of $complete_hostname.
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	Similarly, you can add more hosts to this config file with a line space between each. For e.g., a file with multiple configs might look like:		Similarly, you can add more hosts to this config file with a line space between each. For e.g., a file with multiple configs might look like:
	Host host1		Host host1
	HostName remote.host.1		HostName remote.host.1
	User username		User username

	Host host2		Host host2
	HostName remote.host.2		HostName remote.host.2
	User username		User username

	Host host3		Host host3
	HostName remote.host.3		HostName remote.host.3
	User username		User username

Khojanator: /* SSH Key Setup */

2018-12-26T21:44:54Z

SSH Key Setup

← Older revision		Revision as of 21:44, 26 December 2018
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	=== SSH Key Setup ===		=== SSH Key Setup ===

	1. ~~Step One -~~ Create the RSA key pair		1. Create the RSA key pair
	user$ ssh-keygen -t rsa -b 4096		user$ ssh-keygen -t rsa -b 4096

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	* -b flag specifies the number of bits for the key. It is common to use 2048 or 4096 as possible values for this flag.		* -b flag specifies the number of bits for the key. It is common to use 2048 or 4096 as possible values for this flag.

	Press enter for all questions~~, you~~ may change the defaults, but it is preferred not to. Also, it is common to leave the passphrase empty. The entire point of ssh keys is to make login easier and faster, and passphrase defeats the purpose, I believe. With defaults, your public key will be saved in ~/.ssh/id_rsa.pub and private key will be saved in ~/.ssh/id_rsa file.		Press enter for all questions to keep the defaults. You may change the defaults, but it is preferred not to. Also, it is common to leave the passphrase empty. The entire point of ssh keys is to make login easier and faster, and passphrase defeats the purpose, I believe. With defaults, your public key will be saved in ~/.ssh/id_rsa.pub and private key will be saved in ~/.ssh/id_rsa file.

	2. ~~Step Two -~~ Copy the public id to remote host.		2. Copy the public id to remote host.
	user$ ssh-copy-id user@remote.host		user$ ssh-copy-id user@remote.host

	You can install ssh-copy-id, if it doesn't exist already,		You can install ssh-copy-id if it doesn't exist already,

	OR,		OR,
Line 24:		Line 24:
	Note that, user@remote.host should be replaced with appropriate terms.		Note that, user@remote.host should be replaced with appropriate terms.

	3. ~~Step Three -~~ Create a config file (Optional)		3. Create a config file (Optional)
	Now that you have the key setup, and know how to use vi editor, let's create a config file. Personally, I enjoy the ability to type `ssh tools` and let ssh config take over, instead of typing `ssh user@tools.cs.earlham.edu`. For that,		Now that you have the key setup, and know how to use vi editor, let's create a config file. Personally, I enjoy the ability to type <code>ssh tools</code> and let ssh config take over, instead of typing <code>ssh user@tools.cs.earlham.edu</code>. For that,

	user$ vi ~/.ssh/config		user$ vi ~/.ssh/config

Khojanator at 21:37, 26 December 2018

2018-12-26T21:37:22Z

← Older revision		Revision as of 21:37, 26 December 2018
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	user$ ssh-keygen -t rsa -b 4096		user$ ssh-keygen -t rsa -b 4096

	-t specifies the type of key to create. You can check the possible options in the help. Since we are creating an RSA key, we will use -t rsa. -b flag specifies the number of bits for the key. It is common to use 2048 or 4096 as possible values for this flag. Press enter for all questions, you may change the defaults, but it is preferred not to. Also, it is common to leave the passphrase empty. The entire point of ssh keys is to make login easier and faster, and passphrase defeats the purpose, I believe. So, your public key will be saved in ~/.ssh/id_rsa.pub and private key will be saved in ~/.ssh/id_rsa.		* -t flag specifies the type of key to create. You can check the possible options in the help. Since we are creating an RSA key, we will use -t rsa.
			* -b flag specifies the number of bits for the key. It is common to use 2048 or 4096 as possible values for this flag.

			Press enter for all questions, you may change the defaults, but it is preferred not to. Also, it is common to leave the passphrase empty. The entire point of ssh keys is to make login easier and faster, and passphrase defeats the purpose, I believe. With defaults, your public key will be saved in ~/.ssh/id_rsa.pub and private key will be saved in ~/.ssh/id_rsa file.

	2. Step Two - Copy the public id to remote host.		2. Step Two - Copy the public id to remote host.
	user$ ssh-copy-id user@remote.host		user$ ssh-copy-id user@remote.host
	You can install ssh-copy-id if it doesn't exist already.
			You can install ssh-copy-id, if it doesn't exist already,

	OR,		OR,

	manually copy it as follows		manually copy it as follows

	user$ cat ~/.ssh/id_rsa.pub \| ssh user@remote.host "mkdir -p ~/.ssh && chmod 700 ~/.ssh && cat >> ~/.ssh/authorized_keys"		user$ cat ~/.ssh/id_rsa.pub \| ssh user@remote.host "mkdir -p ~/.ssh && chmod 700 ~/.ssh && cat >> ~/.ssh/authorized_keys"

	Note that, user@remote.host should be replaced with appropriate terms.		Note that, user@remote.host should be replaced with appropriate terms.

	3. Step Three - Create a config file (Optional)		3. Step Three - Create a config file (Optional)
	Now that you have the key setup, and know how to use vi editor, let's create a config file. Personally, I enjoy the ability to type `ssh tools` and let ssh config take over, instead of typing `ssh user@tools.cs.earlham.edu`. For that,		Now that you have the key setup, and know how to use vi editor, let's create a config file. Personally, I enjoy the ability to type `ssh tools` and let ssh config take over, instead of typing `ssh user@tools.cs.earlham.edu`. For that,

	user$ vi ~/.ssh/config		user$ vi ~/.ssh/config
	Enter the insert mode
			Enter the insert mode, and create the config, as follows:

	Host $hostname_you_want_to_use		Host $hostname_you_want_to_use
	HostName $complete_hostname		HostName $complete_hostname