NIS : クライアントの設定2020/09/16

	NIS クライアントの設定をして、NIS サーバーのユーザーアカウントでログインできるようにします。
[1]	サーバー側と同じ NIS システムをインストールします。

root@node01:~#

apt -y install nis

Preconfiguring packages ...

# インストール中、NIS ドメインの設定を求められるため、自ドメイン名を入力

# インストールタスク中、自動的に起動を試みるが失敗するので、終わるまで待つか、放っておいて別ウィンドウで設定開始する

 +----------------------------| Configuring nis |----------------------------+
 | Please choose the NIS "domainname" for this system. If you want this      |
 | machine to just be a client, you should enter the name of the NIS domain  |
 | you wish to join.                                                         |
 |                                                                           |
 | Alternatively, if this machine is to be a NIS server, you can either      |
 | enter a new NIS "domainname" or the name of an existing NIS domain.       |
 |                                                                           |
 | NIS domain:                                                               |
 |                                                                           |
 | srv.world_____________________________________________________________    |
 |                                                                           |
 |                                  <Ok>                                     |
 |                                                                           |
 +---------------------------------------------------------------------------+

[2]	NIS クライアントとしての設定です。

root@node01:~#

vi /etc/yp.conf

#
# yp.conf       Configuration file for the ypbind process. You can define
#               NIS servers manually here if they can't be found by
#               broadcasting on the local net (which is the default).
#
#               See the manual page of ypbind for the syntax of this file.
#
# IMPORTANT:    For the "ypserver", use IP addresses, or make sure that
#               the host is in /etc/hosts. This file is only interpreted
#               once, and if DNS isn't reachable yet the ypserver cannot
#               be resolved and ypbind won't ever bind to the server.

# ypserver ypserver.network.com

# 最終行へ追記 [domain (ドメイン名) server (NIS マスターサーバーのホスト名 or IP アドレス)]

domain srv.world server dlp.srv.world

root@node01:~#

vi /etc/nsswitch.conf

# 7行目：以下のように追記

passwd:         files systemd nis
group:          files systemd nis
shadow:         files nis
gshadow:        files

hosts:          files dns nis

# 必要であれば以下も対応

root@node01:~#

vi /etc/pam.d/common-session

# 最終行に追記 (初回ログイン時にホームディレクトリを自動作成)

session optional        pam_mkhomedir.so skel=/etc/skel umask=077

root@node01:~#

systemctl restart rpcbind nis

root@node01:~#

exit

node01 login: focal     # NIS 登録ユーザー
Password:
Welcome to Ubuntu 20.04.1 LTS (GNU/Linux 5.4.0-42-generic x86_64)

 * Documentation:  https://help.ubuntu.com
 * Management:     https://landscape.canonical.com
 * Support:        https://ubuntu.com/advantage

  System information as of Wed 16 Sep 2020 04:22:09 PM JST

  System load:  0.28               Processes:               134
  Usage of /:   12.4% of 24.54GB   Users logged in:         0
  Memory usage: 5%                 IPv4 address for enp1s0: 10.0.0.51
  Swap usage:   0%

 * "If you've been waiting for the perfect Kubernetes dev solution for
   macOS, the wait is over. Learn how to install Microk8s on macOS."

   https://www.techrepublic.com/article/how-to-install-microk8s-on-macos/

11 updates can be installed immediately.
8 of these updates are security updates.
To see these additional updates run: apt list --upgradable

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

Ubuntu comes with ABSOLUTELY NO WARRANTY, to the extent permitted by
applicable law.

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

Ubuntu comes with ABSOLUTELY NO WARRANTY, to the extent permitted by
applicable law.

Creating directory '/home/focal'.
focal@node01:~$     # ログインできた

# NIS パスワード変更は以下の通り

focal@node01:~$

yppasswd

hanging NIS account information for focal on dlp.srv.world.
Please enter old password:
Changing NIS password for focal on dlp.srv.world.
Please enter new password:
Please retype new password:

The NIS password has been changed on dlp.srv.world.

focal@node01:~$