Mathieu's questions

嗨，我在我的服务器 B 上创建了一个密钥环

我将服务器 B 的公钥复制到服务器 A 的 authorized_keys 文件中

我的服务器在 Ubuntu 20.04 LTS 上

当我尝试将目录从服务器 A 传输到服务器 B 时，出现此错误：

ubuntu@server_B:~$ scp -r -p ubuntu@server_A:/home/ubuntu/www-example-com/ /home/ubuntu/www-example-com/
ubuntu@server_A: Permission denied (publickey).

为什么我有这个错误？如何纠正？

ubuntu@server_B:~$ ls -l /home
total 20
drwx------  2 root   root   16384 Nov  5 01:14 lost+found
drwxr-xr-x 11 ubuntu ubuntu  4096 Nov  5 03:57 ubuntu



ubuntu@server_B:~$ ls -a -l /home/ubuntu
total 76
drwxr-xr-x 11 ubuntu ubuntu 4096 Nov  5 03:57 .
drwxr-xr-x  4 root   root   4096 Nov  5 01:04 ..
-rw-------  1 ubuntu ubuntu 4961 Nov  5 03:38 .bash_history
-rw-r--r--  1 ubuntu ubuntu  220 Feb 25  2020 .bash_logout
-rw-r--r--  1 ubuntu ubuntu 3771 Feb 25  2020 .bashrc
-rw-rw-r--  1 ubuntu ubuntu  241 Nov  5 01:28 bridge_log.txt
drwx------  3 ubuntu ubuntu 4096 Nov  5 01:24 .cache
drwxr-x---  3 ubuntu ubuntu 4096 Nov  5 01:24 .config
drwx------  4 ubuntu ubuntu 4096 Nov  5 01:28 .gnupg
drwxrwxr-x  3 ubuntu ubuntu 4096 Nov  5 03:57 .local
-rw-------  1 ubuntu ubuntu  409 Nov  5 03:50 .mysql_history
drwxr-xr-x  9 ubuntu ubuntu 4096 Nov  5 03:27 nginx-1.18.0
drwxrwxr-x  7 ubuntu ubuntu 4096 Nov  5 03:27 ngx_brotli
drwx------  3 ubuntu ubuntu 4096 Nov  5 01:24 .password-store
-rw-r--r--  1 ubuntu ubuntu  807 Feb 25  2020 .profile
drwx------  2 ubuntu ubuntu 4096 Nov  5 04:43 .ssh
-rw-r--r--  1 ubuntu ubuntu    0 Nov  5 01:07 .sudo_as_admin_successful
-rw-rw-r--  1 ubuntu ubuntu  204 Nov  5 03:33 .wget-hsts
drwxr-xr-x  2 ubuntu ubuntu 4096 Nov  5 04:00 www-example-com



ubuntu@server_B:~$ ls -l .ssh
total 16
-rw------- 1 ubuntu ubuntu  748 Nov  5 04:34 authorized_keys
-rw------- 1 ubuntu ubuntu 3434 Nov  5 04:32 id_rsa_dev-example-com
-rw-r--r-- 1 ubuntu ubuntu  748 Nov  5 04:32 id_rsa_dev-example-com.pub
-rw-r--r-- 1 ubuntu ubuntu  222 Nov  5 04:43 known_hosts

和

ubuntu@server_A ~ $ ls -l /home
total 20
drwx------  2 root   root   16384 Sep  7 17:10 lost+found
drwxr-xr-x 12 ubuntu ubuntu  4096 Nov  5 02:02 ubuntu



ubuntu@server_A ~ $ ls -a -l /home/ubuntu
total 148
drwxr-xr-x 12 ubuntu ubuntu  4096 Nov  5 02:02 .
drwxr-xr-x  4 root   root    4096 Sep  7 17:04 ..
-rw-------  1 ubuntu ubuntu 72711 Nov  5 02:02 .bash_history
-rw-r--r--  1 ubuntu ubuntu   220 Feb 25  2020 .bash_logout
-rw-r--r--  1 ubuntu ubuntu  4049 Sep  7 21:13 .bashrc
-rw-rw-r--  1 ubuntu ubuntu   258 Sep  7 17:20 bridge_log.txt
drwx------  4 ubuntu ubuntu  4096 Sep  7 17:50 .cache
drwxr-x---  4 ubuntu ubuntu  4096 Sep  7 17:50 .config
drwxrwxr-x  3 ubuntu ubuntu  4096 Sep  7 21:13 .drush
drwx------  4 ubuntu ubuntu  4096 Oct 27 16:15 .gnupg
drwxrwxr-x  3 ubuntu ubuntu  4096 Sep  7 17:50 .local
-rw-------  1 ubuntu ubuntu  3417 Sep 14 04:38 .mysql_history
drwxr-xr-x  9 ubuntu ubuntu  4096 Sep  7 17:38 nginx-1.18.0
drwxrwxr-x  7 ubuntu ubuntu  4096 Sep  7 17:38 ngx_brotli
drwx------  3 ubuntu ubuntu  4096 Sep  7 17:18 .password-store
-rw-r--r--  1 ubuntu ubuntu   807 Feb 25  2020 .profile
-rw-rw-r--  1 ubuntu ubuntu    66 Sep  7 21:15 .selected_editor
drwx------  2 ubuntu ubuntu  4096 Nov  5 04:42 .ssh
-rw-r--r--  1 ubuntu ubuntu     0 Sep  7 17:07 .sudo_as_admin_successful
-rw-rw-r--  1 ubuntu ubuntu   244 Nov  5 03:45 .wget-hsts
drwxr-xr-x  6 ubuntu ubuntu  4096 Nov  4 01:03 www-example-com



ubuntu@server_A ~ $ ls -l .ssh
total 4
-rw------- 1 ubuntu ubuntu 1496 Nov  5 04:33 authorized_keys

服务器 B（副本）

$ cat /home/ubuntu/.ssh/id_rsa_dev-example-com.pub

服务器 A（过去）

$ nano /home/ubuntu/.ssh/authorized_keys
$ sudo systemctl restart ssh

我将使用 Ubuntu 20.04 重新制作服务器

它将具有 6 GB 的 RAM、一个用于操作系统的 20 GB SSD 和一个用于数据的 100 GB SSD。

我们应该做一个 SWAP 分区吗？

如果是这样，需要多少 GB？

谢谢

我将把我的站点从 Ubuntu 18.04 服务器移动到 Ubuntu 20.04 服务器

在我的旧服务器上，我以这种方式安装了 MySQL：

$ wget -c https://dev.mysql.com/get/mysql-apt-config_0.8.12-1_all.deb
$ sudo dpkg -i mysql-apt-config_0.8.12-1_all.deb
$ sudo apt update
$ sudo apt install mysql-server

ubuntu@www-oldserver-com ~ $ mysql -V
mysql  Ver 8.0.21 for Linux on x86_64 (MySQL Community Server - GPL)

在我的新服务器上，MySQL 8 已经在 Ubuntu 20.04 存储库中

我应该像下面这样安装 MySQL 还是使用其他方法不破坏任何东西？

$ sudo apt install mysql-server

ubuntu@www-newserver-com:~$ mysql -V
mysql  Ver 8.0.21-0ubuntu0.20.04.4 for Linux on x86_64 ((Ubuntu))

我似乎在某处读到社区 MySQL 版本与分发存储库中的版本不兼容。

我在 ProtonMail 有一个 PRO 帐户，我想将它用于我的网络服务器。我在这里找到了一个教程：

https://pychao.com/2018/10/13/use-protonmail-bridge-on-headless-linux-machines/#comment-6612

https://pychao.com/2018/10/14/use-protonmail-for-wordpress-servers-smtp-setting-on-google-cloud-platform/

在我的服务器上，我尝试了以下命令行：

$ sudo apt install pass
$ wget -c https://protonmail.com/download/protonmail-bridge_1.2.7-1_amd64.deb
$ sudo dpkg -i protonmail-bridge_1.2.7-1_amd64.deb
$ sudo apt update
$ sudo apt install protonmail-bridge

但我遇到错误：

ubuntu@www-example-com ~ $ sudo dpkg -i protonmail-bridge_1.2.7-1_amd64.deb
Selecting previously unselected package protonmail-bridge.
(Reading database ... 105245 files and directories currently installed.)
Preparing to unpack protonmail-bridge_1.2.7-1_amd64.deb ...
Unpacking protonmail-bridge (1.2.7-1) ...
dpkg: dependency problems prevent configuration of protonmail-bridge:
 protonmail-bridge depends on qt5-default; however:
  Package qt5-default is not installed.
 protonmail-bridge depends on libqt5designer5; however:
  Package libqt5designer5 is not installed.
 protonmail-bridge depends on libqt5multimediawidgets5; however:
  Package libqt5multimediawidgets5 is not installed.
 protonmail-bridge depends on libqt5quickwidgets5; however:
  Package libqt5quickwidgets5 is not installed.
 protonmail-bridge depends on libpulse-mainloop-glib0; however:
  Package libpulse-mainloop-glib0 is not installed.
 protonmail-bridge depends on libsecret-1-0; however:
  Package libsecret-1-0 is not installed.
 protonmail-bridge depends on ttf-dejavu; however:
  Package ttf-dejavu is not installed.

dpkg: error processing package protonmail-bridge (--install):
 dependency problems - leaving unconfigured
Processing triggers for mime-support (3.60ubuntu1) ...
Errors were encountered while processing:
 protonmail-bridge

和 ：

ubuntu@www-example-com ~ $ sudo apt install protonmail-bridge
Reading package lists... Done
Building dependency tree       
Reading state information... Done
protonmail-bridge is already the newest version (1.2.7-1).
You might want to run 'apt --fix-broken install' to correct these.
The following packages have unmet dependencies:
 protonmail-bridge : Depends: qt5-default but it is not going to be installed
                     Depends: libqt5designer5 but it is not going to be installed
                     Depends: libqt5multimediawidgets5 but it is not going to be installed
                     Depends: libqt5quickwidgets5 but it is not going to be installed
                     Depends: libpulse-mainloop-glib0 but it is not going to be installed
                     Depends: libsecret-1-0 but it is not going to be installed
                     Depends: ttf-dejavu but it is not going to be installed
E: Unmet dependencies. Try 'apt --fix-broken install' with no packages (or specify a solution).

如何在 Ubuntu Server 20.04 上安装 ProtonMail？