I’m using putty on Buster Just Fine. are you sure you have X11 Forwarding turned on?
Under SSH, X11 Forwarding? after you set it up did you save the profile?
root@zynthian:~# sudo apt-get install vnc4server blackbox
Reading package lists… Done
Building dependency tree
Reading state information… Done
The following additional packages will be installed:
libbt0v5 tigervnc-common tigervnc-standalone-server
Suggested packages:
bbkeys menu xfonts-100dpi | xfonts-75dpi xfonts-scalable
The following NEW packages will be installed:
blackbox libbt0v5 tigervnc-common tigervnc-standalone-server vnc4server
0 upgraded, 5 newly installed, 0 to remove and 64 not upgraded.
Need to get 1,156 kB of archives.
After this operation, 3,140 kB of additional disk space will be used.
Do you want to continue? [Y/n] y
Get:1 http://ftp.heanet.ie/mirrors/raspbian/raspbian stretch/main armhf libbt0v5 armhf 0.70.1-34 [76.5 kB]
Get:2 http://ftp.heanet.ie/mirrors/raspbian/raspbian stretch/main armhf blackbox armhf 0.70.1-34 [191 kB]
Get:3 http://ftp.heanet.ie/mirrors/raspbian/raspbian stretch/main armhf tigervnc-common armhf 1.7.0+dfsg-7 [59.2 kB]
Get:4 http://ftp.heanet.ie/mirrors/raspbian/raspbian stretch/main armhf tigervnc-standalone-server armhf 1.7.0+dfsg-7 [823 kB]
Get:5 http://ftp.heanet.ie/mirrors/raspbian/raspbian stretch/main armhf vnc4server armhf 4.1.1+X4.3.0+t-1 [7,122 B]
Fetched 1,156 kB in 5s (228 kB/s)
Selecting previously unselected package libbt0v5:armhf.
(Reading database … 96168 files and directories currently installed.)
Preparing to unpack …/libbt0v5_0.70.1-34_armhf.deb …
Unpacking libbt0v5:armhf (0.70.1-34) …
Selecting previously unselected package blackbox.
Preparing to unpack …/blackbox_0.70.1-34_armhf.deb …
Unpacking blackbox (0.70.1-34) …
Selecting previously unselected package tigervnc-common.
Preparing to unpack …/tigervnc-common_1.7.0+dfsg-7_armhf.deb …
Unpacking tigervnc-common (1.7.0+dfsg-7) …
Selecting previously unselected package tigervnc-standalone-server.
Preparing to unpack …/tigervnc-standalone-server_1.7.0+dfsg-7_armhf.deb …
Unpacking tigervnc-standalone-server (1.7.0+dfsg-7) …
Selecting previously unselected package vnc4server.
Preparing to unpack …/vnc4server_4.1.1+X4.3.0+t-1_armhf.deb …
Unpacking vnc4server (4.1.1+X4.3.0+t-1) …
Setting up tigervnc-common (1.7.0+dfsg-7) …
update-alternatives: using /usr/bin/tigervncconfig to provide /usr/bin/vncconfig (vncconfig) in auto mode
update-alternatives: using /usr/bin/tigervncpasswd to provide /usr/bin/vncpasswd (vncpasswd) in auto mode
Setting up tigervnc-standalone-server (1.7.0+dfsg-7) …
update-alternatives: using /usr/bin/tigervncserver to provide /usr/bin/vncserver (vncserver) in auto mode
update-alternatives: using /usr/bin/Xtigervnc to provide /usr/bin/Xvnc (Xvnc) in auto mode
Setting up libbt0v5:armhf (0.70.1-34) …
Processing triggers for libc-bin (2.24-11+deb9u4) …
Setting up vnc4server (4.1.1+X4.3.0+t-1) …
Processing triggers for man-db (2.7.6.1-2) …
Processing triggers for hicolor-icon-theme (0.15-1) …
Setting up blackbox (0.70.1-34) …
update-alternatives: using /usr/bin/blackbox to provide /usr/bin/x-window-manager (x-window-manager) in auto mode Error: GDBus.Error:org.freedesktop.systemd1.UnitMasked: Unit packagekit.service is masked.
When I try vnc4server
root@zynthian:~# vnc4server
-bash: vnc4server: command not found