$ sudo apt update
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://repo.mysql.com/apt/debian buster InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 467B942D3A79BD29

$ sudo apt-key adv --keyserver keys.gnupg.net --recv-keys 467B942D3A79BD29
Executing: /tmp/apt-key-gpghome.XXXXXXXXXX/gpg.1.sh --keyserver keys.gnupg.net --recv-keys 467B942D3A79BD29
gpg: keyserver receive failed: Server indicated a failure

$ sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 467B942D3A79BD29
Executing: /tmp/apt-key-gpghome.aZcq2blOEC/gpg.1.sh --keyserver keyserver.ubuntu.com --recv-keys 467B942D3A79BD29
gpg: key 467B942D3A79BD29: public key "MySQL Release Engineering <mysql-build@oss.oracle.com>" imported
gpg: Total number processed: 1
gpg:               imported: 1

$ sudo apt-get install apt-transport-https
$ curl https://packages.sury.org/php/apt.gpg | sudo apt-key add -

- /etc/apt/sources.list.d/deb.sury.org.list
[src]
deb https://packages.sury.org/php/ stretch main

$ sudo apt-get update
$ sudo apt-get install php5.6-cli php5.6-fpm php7.0-cli php7.0-fpm

server {
	listen 8870 default_server;
	listen [::]:8870 default_server;
	server_name _;
	root /var/www/site-with-php7.0;
	index index.php;
	location / {
		include snippets/fastcgi-php.conf;
		fastcgi_pass unix:/run/php/php7.0-fpm.sock; # adjust for the listen setting discussed above
	}
}

server {
	listen 8856 default_server;
	listen [::]:8856 default_server;
	server_name _;
	root /var/www/site-with-php5.6;
	index index.php;
	location / {
		include snippets/fastcgi-php.conf;
		fastcgi_pass unix:/run/php/php5.6-fpm.sock; # adjust for the listen setting discussed above
	}
}

$ ln -s ../sites-available/site-with-php5.6 /etc/nginx/sites-enabled
$ ln -s ../sites-available/site-with-php7.0 /etc/nginx/sites-enabled
$ systemctl reload nginx.service

sudo aptitude purge $(dpkg -l |grep -e '^rc' | awk '{print $2}')

sudo crontab -e

# update-alternatives --config editor
% sudo update-alternatives --config editor
alternative editor (/usr/bin/editor を提供) には 3 個の選択肢があります。

  選択肢    パス              優先度  状態
------------------------------------------------------------
 * 0            /bin/nano            40        自動モード
  1            /bin/nano            40        手動モード
  2            /usr/bin/vim.basic   30        手動モード
  3            /usr/bin/vim.tiny    10        手動モード

現在の選択 [*] を保持するには Enter、さもなければ選択肢の番号のキーを押してください: 2
update-alternatives: /usr/bin/editor (editor) を提供するために 手動モード で /usr/bin/vim.basic を使います

# update-alternatives --config editor
There are 3 choices for the alternative editor (providing /usr/bin/editor).

  Selection    Path                Priority   Status
------------------------------------------------------------
 * 0            /bin/nano            40        auto mode
  1            /bin/nano            40        manual mode
  2            /usr/bin/vim.basic   30        manual mode
  3            /usr/bin/vim.tiny    10        manual mode

Press enter to keep the current choice[*], or type selection number: 2
update-alternatives: using /usr/bin/vim.basic to provide /usr/bin/editor (editor) in manual mode

# deb cdrom:[Debian GNU/Linux 4.0 r9 _Etch_ - Official i386 NETINST Binary-1 20100523-09:56]/ etch contrib main
# deb http://archive.debian.org/debian/ etch contrib main non-free
deb http://ftp.riken.jp/Linux/debian/debian-archive/ etch contrib main non-free

sudo dpkg-reconfigure keyboard-configuration
sudo service keyboard-setup restart

XKBMODEL="pc105"
XKBLAYOUT="us"

XKBMODEL="jp106"
XKBLAYOUT="jp"

deb http://ftp.jaist.ac.jp/debian-backports/ squeeze-backports main contrib non-free

Package: *
Pin: release a=squeeze-backports
Pin-Priority: 200

% gpg --keyserver keys.gnupg.net --recv-key 89DF5277
% gpg -a --export 89DF5277 | sudo apt-key add -

deb http://packages.dotdeb.org stable all
deb-src http://packages.dotdeb.org stable all

% wget http://www.dotdeb.org/dotdeb.gpg
% cat dotdeb.gpg | sudo apt-key add -
OK

E: この APT が対応している以上の数の説明が要求されました。
E: Problem with MergeList /var/lib/apt/lists/cdn.debian.or.jp_debian_dists_unstable_main_i18n_Translation-ja
E: パッケージ一覧または状態ファイルをパースできませんでした、または開けませんでした。

APT::Acquire::Translation "none";

title       Debian GNU/Linux, kernel 2.6.26-2-686
root        (hd0,0)
kernel      /boot/vmlinuz-2.6.26-2-686 root=/dev/sda1 ro acpi=off
initrd      /boot/initrd.img-2.6.26-2-686

iface eth0 inet static
address 192.168.0.XX
netmask 255.255.255.0
broadcast 192.168.0.255
gateway 192.168.0.1

% uname -a
Linux trinity 2.6.18-6-686 #1 SMP Mon Aug 18 08:42:39 UTC 2008 i686 GNU/Linux

# aptitude update

Reading package lists...
W: There is no public key available for the following key IDs:
4D270D06F42584E6
W: You may want to run apt-get update to correct these problems

# aptitude update
# aptitude upgrade
# aptitude dist-upgrade

% uname -a
Linux trinity 2.6.26-1-686 #1 SMP Sat Jan 10 18:29:31 UTC 2009 i686 GNU/Linux

APT::Cache-Limit "100000000";

# aptitude update
...

Reading package lists... Done
W: There are no public key available for the following key IDs:
A70DAF536070D3A1
W: There are no public key available for the following key IDs:
A70DAF536070D3A1
W: There are no public key available for the following key IDs:
A70DAF536070D3A1
W: You may want to run apt-get update to correct these problems

# aptitude update
...

パッケージリストを読み込んでいます... 完了
W: 以下の鍵 ID に対して利用可能な公開鍵がありません:
A70DAF536070D3A1
W: 以下の鍵 ID に対して利用可能な公開鍵がありません:
A70DAF536070D3A1
W: 以下の鍵 ID に対して利用可能な公開鍵がありません:
A70DAF536070D3A1

# Enter your license key here
LicenseKey YOUR_LICENSE_KEY_HERE

# Enter your User ID here
UserId YOUR_USER_ID_HERE

# Enter the Product ID(s) of the database(s) you would like to update
# By default 106 (MaxMind GeoIP Country) is listed below
ProductIds 106

% geoiplookup example.com
GeoIP Country Edition: US, United States

Template #30 in /var/lib/dpkg/info/base-config.templates does not contain a 'Template:' line