01 gen a key pair
=======================================
[chouck@centostwo .ssh]$ ssh-keygen
Generating public/private rsa key pair.
Enter file in which to save the key (/home/chouck/.ssh/id_rsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/chouck/.ssh/id_rsa.
Your public key has been saved in /home/chouck/.ssh/id_rsa.pub.
The key fingerprint is:
SHA256:cj7nXiKZzEPHdvimt+egO/kW43KhWH9anBXxsosuu98 chouck@centostwo
The key's randomart image is:
+---[RSA 2048]----+
| . |
| o|
| ...|
| . . o.|
| . S = . . .|
| B =.o+o + |
| Xoo=*+= |
| .**B*+o |
| .O&**E |
+----[SHA256]-----+
[chouck@centostwo .ssh]$
02 ls -l .ssh/id_*
===================================
copy content of id_rsa.pub key (this is a SINGLE line)
cat id_rsa.pub
ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDEp5xKFfDmVMpdLOfqLUoF80a1Od1odERFqC/A971PxP4X98Z2ToDWEuvJ9/2asWZz8iSHFuHqpYca2PeJGNHbPB59217xEK08NRIomZ+w4gzxoNSsrSN1ufX1vJuAzv+R1YYewsE7F5aXCI+5R7m8Tv44pECiP9Ebi4fLKSwtcGFXW2v7Eh66mnCkmIdYEInPbWlrlNmuetUluWQXnYzjeoQId37bcTxbW7uJLZkRx5+Qaseh7FrlwWOhiS1RWtwwIW+P2KIB9nwlwWe1h/FQ5K3ncQ3t2Mp2CYzm14VutUWqs/jEgN97FnBr806kwNB0Z+u+r2Nvd/bMCbeoQMIF chouck@centostwo
03 - On the remote server
===================================
Put the pub key into the .ssh/authorized_keys file
in the account to be connected to.
vi .ssh/authorized_keys
1 ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDkwLpm55oYYD2wZCFD3jf2zRVkJ1sj0/zIUhYDsqA7yL4o33Wp0LjmtLtsqA+lhBlTWHE8Q5rUhYjHAlFqiuHZcHb+ WNr8CqPjZp1r/EkJDm5AU1byGnNGN8BLvCGY8Lr0EGchd4K4Q81Cz3uCcFob5tB8sEYjCNi+qRR6kaaJDo6UiutFJtr4MPp3R2Y5o7nFHlc/NhiY/+AYYHNVlzsnUnkz BckMagptm0z9wbiAs2Hbvsou6JsC1bjBg6bXuefy0G3Y9gtPD9ImleR1fzZr5BOrdk7x7n4eQ9cpgsfByr25FxW4cejdFmZQ9EV50frWkDPYhyHEg5B+PhCJU97r cho uck@chouck-Vostro-3700
2 ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDEp5xKFfDmVMpdLOfqLUoF80a1Od1odERFqC/A971PxP4X98Z2ToDWEuvJ9/2asWZz8iSHFuHqpYca2PeJGNHbPB59 217xEK08NRIomZ+w4gzxoNSsrSN1ufX1vJuAzv+R1YYewsE7F5aXCI+5R7m8Tv44pECiP9Ebi4fLKSwtcGFXW2v7Eh66mnCkmIdYEInPbWlrlNmuetUluWQXnYzjeoQI d37bcTxbW7uJLZkRx5+Qaseh7FrlwWOhiS1RWtwwIW+P2KIB9nwlwWe1h/FQ5K3ncQ3t2Mp2CYzm14VutUWqs/jEgN97FnBr806kwNB0Z+u+r2Nvd/bMCbeoQMIF cho uck@centostwo
04 test it
==========================================================================
ssh chouck@128.226.30.236
Last failed login: Fri Nov 12 06:56:21 EST 2021 from centostwo.binghamton.edu on ssh:notty
There were 2 failed login attempts since the last successful login.
Last login: Fri Nov 12 06:55:39 2021
[chouck@centoswork ~]$ pwd
/home/chouck