在 Fedora 27 Desktop 上设置屏幕共享时出现问题

Question

我正在使用 GNOME 运行 Fedora 27 桌面版。我已经尝试了来自整个网络的说明，但没有找到任何可以让我设置与远程用户共享我的屏幕的方法。谁能帮我解决这个问题？

非常感谢您的回复。

到目前为止的故事如下：

========

我最初尝试过：

Activies -> Show Application -> Settings -> Sharing

并看到选项：

File Sharing
Media Sharing
Remote Login

但没有看到 Screen Sharing 的选项，建议应该显示一页。

========

我看过：

https://docs.fedoraproject.org/f27/system-administrators-guide/Wayland.html

然后运行

$ echo $WAYLAND_DISPLAY

产生

wayland-0

但我不知道如何使用这些信息来解决我的问题。我也没有找到说明 Fedora 27 下 Wayland 屏幕共享工作正常的文档。

========

在我尝试过的众多解决方案中，我按照https://docs.fedoraproject.org/f27/system-administrators-guide/infrastructure-services/TigerVNC.html 的说明取得了最好的进展

以下命令有效：

sudo dnf install tigervnc-server
sudo cp /lib/systemd/system/vncserver@.service /etc/systemd/system/vncserver@.service 

然后我编辑了/etc/systemd/system/vncserver@.service，在以下两行中将<USER>替换为我的用户名：

ExecStart=/sbin/runuser -l <USER> -c "/usr/bin/vncserver %i -geometry 1280x1024"
PIDFile=/home/<USER>/.vnc/%H%i.pid

然后我跑了：

sudo systemctl daemon-reload

并设置密码：

vncpasswd

接下来网站的说明告诉我：

使用有效的显示编号，执行以下命令：

sudo systemctl enable vncserver@:display_number.service

我尝试过使用显示编号 0、1 和 2。

例如，显示编号为 1 时，我收到不同的错误消息，具体取决于 SELinux 设置为 Enforcing 还是 Permissive。

sudo systemctl start vncserver@:1.service

使用“强制”：

Job for vncserver@:1.service failed because the service did not take the steps required by its unit configuration.
See "systemctl  status vncserver@:1.service" and "journalctl  -xe" for details.

尝试 SELinux 建议的以下步骤后：

sudo ausearch -c 'systemd' --raw | audit2allow -M my-systemd
semodule -i my-systemd.pp

和：

sudo ausearch -c 'geoclue' --raw | audit2allow -M my-geoclue
sudo semodule -i my-geoclue.pp

错误消息已更改为与此处给出的“Permissive”相同：

Job for vncserver@:1.service failed because the control process exited with error code.
See "systemctl  status vncserver@:1.service" and "journalctl  -xe" for details.

systemctl status vncserver@:1.service 的输出如下：

● vncserver@:1.service - Remote desktop service (VNC)
   Loaded: loaded (/etc/systemd/system/vncserver@.service; disabled; vendor preset: disabled)
   Active: failed (Result: exit-code) since Mon 2018-03-26 12:24:12 EDT; 3min 4s ago
  Process: 23294 ExecStart=/usr/sbin/runuser -l jazcap53 -c /usr/bin/vncserver :1 (code=exited, status=98)
  Process: 23292 ExecStartPre=/bin/sh -c /usr/bin/vncserver -kill :1 > /dev/null 2>&1 || : (code=exited, status=0/SUCCESS)

Mar 26 12:24:12 localhost.localdomain systemd[1]: Starting Remote desktop service (VNC)...
Mar 26 12:24:12 localhost.localdomain systemd[1]: vncserver@:1.service: Control process exited, code=exited status=98
Mar 26 12:24:12 localhost.localdomain systemd[1]: Failed to start Remote desktop service (VNC).
Mar 26 12:24:12 localhost.localdomain systemd[1]: vncserver@:1.service: Unit entered failed state.
Mar 26 12:24:12 localhost.localdomain systemd[1]: vncserver@:1.service: Failed with result 'exit-code'.

而sudo journalctl -xe 产生了：

Mar 26 12:27:41 localhost.localdomain systemd[1]: Started SSSD Kerberos Cache Manager.
-- Subject: Unit sssd-kcm.service has finished start-up
-- Defined-By: systemd
-- Support: https://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit sssd-kcm.service has finished starting up.
-- 
-- The start-up result is done.
Mar 26 12:27:41 localhost.localdomain audit[1]: SERVICE_START pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 msg='unit=sssd-kcm c
Mar 26 12:27:41 localhost.localdomain sssd[kcm][23679]: Starting up
Mar 26 12:27:41 localhost.localdomain systemd[1]: Started SSSD Secrets Service responder.
-- Subject: Unit sssd-secrets.service has finished start-up
-- Defined-By: systemd
-- Support: https://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit sssd-secrets.service has finished starting up.
-- 
-- The start-up result is done.
Mar 26 12:27:41 localhost.localdomain audit[1]: SERVICE_START pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 msg='unit=sssd-secre
Mar 26 12:27:41 localhost.localdomain sssd[secrets][23680]: Starting up
Mar 26 12:30:04 localhost.localdomain sudo[23858]: jazcap53 : TTY=pts/0 ; PWD=/home/jazcap53 ; USER=root ; COMMAND=/bin/journalctl -xe
Mar 26 12:30:04 localhost.localdomain audit[23858]: USER_CMD pid=23858 uid=1001 auid=1001 ses=3 subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 msg
Mar 26 12:30:04 localhost.localdomain audit[23858]: CRED_REFR pid=23858 uid=0 auid=1001 ses=3 subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 msg='
Mar 26 12:30:04 localhost.localdomain sudo[23858]: pam_systemd(sudo:session): Cannot create session: Already occupied by a session
Mar 26 12:30:04 localhost.localdomain audit[23858]: USER_START pid=23858 uid=0 auid=1001 ses=3 subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 msg=
Mar 26 12:30:04 localhost.localdomain sudo[23858]: pam_unix(sudo:session): session opened for user root by (uid=0)

Answer 1

如果您没有安装Vino，GNOME 将不会显示屏幕共享作为选项。

sudo dnf install vino 应该这样做。然后，您可以按照最初的尝试设置屏幕共享。