【VPS・Linuxサーバー入門】WebARENA IndigoのVPSでお手頃な値段でプライベートLinuxサーバーを試そう

            1) IPv6対応のインターネットプロバイダと契約
2) IPv6対応のネットワークインターフェイスを備えたパソコン(ハード面)
3) IPv6対応のネットワークルータ(ハード面)でLANを構築
4) IPv6対応のサーバーへアクセスしている

        

            % ping6 2001:xxxx:xxxx:xxxx:xxxx:xxxx:0001
PING6(56=40+8+8 bytes) 2001:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:fc14 --> 2001:xxxx:xxxx:xxxx:xxxx:xxxx:1
16 bytes from 2001:xxxx:xxxx:xxxx:xxxx:xxxx:1, icmp_seq=0 hlim=51 time=150.839 ms
16 bytes from 2001:xxxx:xxxx:xxxx:xxxx:xxxx:1, icmp_seq=1 hlim=51 time=188.256 ms
#....
--- 2001:xxxx:xxxx:xxxx:xxxx:xxxx:0001 ping6 statistics ---
7 packets transmitted, 7 packets received, 0.0% packet loss
round-trip min/avg/max/std-dev = 57.379/112.551/205.652/61.659 ms

        

            $ ls -la .ssh
-rw-r--r--  1 ******* ******* 287  4月 21  2022 config
#...略

        

            $ cd <SSH秘密鍵をダウンロードした場所>
$ mv private_key.txt ~/.ssh/tacokin-no-himitsu

        

            ホスト名:
    作成したインスタンスに付与されたIPアドレス
ユーザー名:
    インスタンス化したOSに対応したユーザー名(※1)
パスフレーズ:
    空白(もしくは不要)
ポート:
    22
SSH鍵:
    SSH鍵の秘密鍵(private_key.txt)の中身

        

            CentOS: centos
Ubuntu: ubuntu
Rocky Linux: rocky
Alma Linux: alma
Oracle Linux: oracle
Debian: debian

        

            #...
Host my-indigo
  HostName 2001:xxxx:xxxx:xxxx:xxxx:xxxx:0001
  User debian
  Port 22
  IdentityFile "~/.ssh/tacokin-no-himitsu"

        

            % ssh my-indigo
The authenticity of host '2001:xxxx:xxxx:xxxx:xxxx:xxxx::1 (2001:xxxx:xxxx:xxxx:xxxx:xxxx::1)' can't be established.
ED25519 key fingerprint is SHA256:xxxxxxxxxxxxxxxxxxxxxxxxxxxx.
This key is not known by any other names
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes

Warning: Permanently added '2001:xxxx:xxxx:xxxx:xxxx:xxxx::1' (ED25519) to the list of known hosts.
Linux i-1xxxxxxxxxxxxx 5.10.0-16-amd64 #1 SMP Debian 5.10.127-1 (2022-06-30) x86_64

The programs included with the Debian GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
-bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)
_____________________________________________________________________
WARNING! Your environment specifies an invalid locale.
 The unknown environment variables are:
   LC_CTYPE=en_US.UTF-8 LC_MESSAGES=en_US.UTF-8 LC_ALL=en_US.UTF-8
 This can affect your user experience significantly, including the
 ability to manage packages. You may install the locales by running:

 sudo dpkg-reconfigure locales

 and select the missing language. Alternatively, you can install the
 locales-all package:

 sudo apt-get install locales-all

To disable this message for all users, run:
   sudo touch /var/lib/cloud/instance/locale-check.skip
_____________________________________________________________________

debian@i-1xxxxxxxxxxxxx:~$ 

        

            % ssh my-indigo
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@         WARNING: UNPROTECTED PRIVATE KEY FILE!          @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
Permissions 0644 for '/*********/.ssh/tacokin-no-himitsu' are too open.
It is required that your private key files are NOT accessible by others.
This private key will be ignored.
Load key "/*********/.ssh/tacokin-no-himitsu": bad permissions
debian@2001:xxxx:xxxx:xxxx:xxxx:xxxx::1: Permission denied (publickey).

% sudo chmod 600 tacokin-no-himitsu