[LINUX] Until you can borrow VPS with Conoha and authenticate public key with SSH

Work log from Mac to VPS connecting with SSH. It's not a big task, but I'll forget it soon, so make a note for myself

environment

Conoha VPS

Add a server in the Conoha Control Panel. This time, specify application: LAMP. At the moment it seems to be CentOS 8.

Create working user

Log in to the VPS from the client environment

Check the IP address from the details screen of the added server, and log in as the root user.

>>> ssh [email protected]x.xxx.xxx -p 22

Create a working user on your VPS

# adduser tukanpo
# passwd tukanpo

Add the created user to the wheel group

# gpasswd -a tukanpo wheel

[Addition] Later added to the apache group

Edit sudo config file

# sudo visudo

If the second line is commented out, uncomment it

## Allows people in group wheel to run all commands
%wheel  ALL=(ALL)       ALL

Creating a private / public key

Log in to the server again as a working user

Log out of VPS

# exit

Login as a working user

>>> ssh [email protected] -p 22

Create a .ssh directory directly under the user's working directory

$ mkdir .ssh
$ chmod 700 .ssh

Log out and switch to client again

Create a key on the client

Create .ssh directory if not yet created

>>> cd ~
>>> mkdir .ssh
>>> chmod 700 .ssh
>>> cd .ssh

Generate a key (unnecessary if it already exists and can be reused)

>>> ssh-keygen -t rsa -b 2048

Copy the client's public key to the server

Copy the public key to authorized_keys on the server side

>>> scp id_rsa.pub [email protected]:~/.ssh/authorized_keys

Enable connection by host name

Edit the config file in the .ssh directory (create it if it doesn't exist)

>>> vi config

Add the following

Host tukanpo.net
  HostName xxx.xxx.xxx.xxx
  User tukanpo
  Port 22
  IdentityFile ~/.ssh/id_rsa

Connect to VPS with host name

>>> ssh tukanpo.net

end

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