mirror of
https://github.com/AlexBocken/mykb.git
synced 2024-11-14 02:06:17 +01:00
80 lines
1.9 KiB
Markdown
80 lines
1.9 KiB
Markdown
# General
|
|
The basic syntax is
|
|
```
|
|
ssh user@domain
|
|
```
|
|
You can either log in using a password or an ssh key.
|
|
The second method is considered safer and more user friendly.
|
|
To initialize the ability to log in using an ssh key, you need a local ssh key-pair.
|
|
If you dont have one, generate one on your local machine using
|
|
```
|
|
ssh-keygen -t rsa
|
|
```
|
|
and following the instructions.
|
|
This generated a public and private key pair which are saved in `~/.ssh`.
|
|
To then enable the key based login, you have to make sure that `~/.ssh` exists on the server.
|
|
Change the permisions of this folder using `chmod 700 ~/.ssh`.
|
|
The next step is to make the `authorized_keys` file using
|
|
```
|
|
touch ~/authorized_keys
|
|
chmod 600 ~/.ssh/authorized_keys
|
|
```
|
|
Now open the `authorized_keys` and copy-paste the public key contents in to it.
|
|
|
|
One can also use `ssh-copy-id user@domain` after generating the key-pair.
|
|
|
|
|
|
|
|
## Add keys to Keychain
|
|
|
|
If you added a passphrase to your key, you may be tired of typing it over and over again.
|
|
Add the following to your `~/.ssh/config`.
|
|
|
|
```
|
|
Host HOME
|
|
User root
|
|
HostName domain.example
|
|
IdentityFile ~/.ssh/id_rsa
|
|
AddKeysToAgent yes
|
|
UseKeychain yes
|
|
```
|
|
|
|
This saves the passphrase in the keychain for the current session.
|
|
It also allows you to specify which specific key to use and to use `ssh HOME` to connect to the server.
|
|
|
|
|
|
## Add keys for layered logins
|
|
|
|
If you need to connect to an access server before connecting to the actual server you want to connect to, this can be automized by adding
|
|
|
|
```
|
|
IgnoreUnknown AddKeysToAgent,UseKeychain
|
|
```
|
|
|
|
## All EXEMPLUM-COMPANY
|
|
```
|
|
Host EXEMP*
|
|
User username
|
|
IdentityFile ~/.ssh/id_rsa
|
|
AddKeysToAgent yes
|
|
UseKeychain yes
|
|
```
|
|
|
|
## Access server
|
|
|
|
```
|
|
Host EXEMPaccess
|
|
HostName login.example.com
|
|
```
|
|
|
|
## Working server
|
|
|
|
```
|
|
Host EXEMPwork
|
|
HostName work.example.com
|
|
proxycommand ssh -CW %h:%p EXEMPaccess ## access server
|
|
|
|
```
|
|
to your `~/.ssh/config`.
|
|
To connect to the working server, just type `ssh EXEMPwork`.
|