LinuxQuestions.org - Configuring TigerVNC on CentOS 8

I am trying to configure TigerVNC server on CentOS 8 but when I try to start the server using systemctl it stops right after startup.
Please find below the steps that I did:

1) I installed tigervnc-server package:

Code:

# dnf install tigervnc-server

2) I edited the tigervnc-server config file adding my user:

Code:

# nano /etc/tigervnc/vncserver.users

Code:

# cat /etc/tigervnc/vncserver.users

# TigerVNC User assignment

#

# This file assigns users to specific VNC display numbers.

# The syntax is <display>=<username>. E.g.:

#

# :2=andrew

# :3=lisa

 

:2=cristian

The user that I added is in the sudoers (wheel) group:

Code:

# cat /etc/group

root:x:0:

bin:x:1:

daemon:x:2:

sys:x:3:

adm:x:4:

tty:x:5:

disk:x:6:

lp:x:7:

mem:x:8:

kmem:x:9:

wheel:x:10:cristian

cdrom:x:11:

mail:x:12:

man:x:15:

dialout:x:18:

floppy:x:19:

games:x:20:

tape:x:33:

video:x:39:

ftp:x:50:

lock:x:54:

audio:x:63:

users:x:100:

nobody:x:65534:

dbus:x:81:

utmp:x:22:

utempter:x:35:

input:x:999:

kvm:x:36:qemu

render:x:998:

systemd-journal:x:190:

systemd-coredump:x:997:

systemd-resolve:x:193:

tss:x:59:

polkitd:x:996:

geoclue:x:995:

ssh_keys:x:994:

printadmin:x:993:

gluster:x:992:

rtkit:x:172:

pipewire:x:991:

pulse-access:x:990:

pulse-rt:x:989:

pulse:x:171:

libstoragemgmt:x:988:

qemu:x:107:

usbmuxd:x:113:

unbound:x:987:

rpc:x:32:

chrony:x:986:

avahi:x:70:

brlapi:x:985:

setroubleshoot:x:984:

saslauth:x:76:

cgred:x:983:

dnsmasq:x:982:

radvd:x:75:

sssd:x:981:

libvirt:x:980:

cockpit-ws:x:979:

cockpit-wsinstance:x:978:

flatpak:x:977:

colord:x:976:

rpcuser:x:29:

abrt:x:173:

gdm:x:42:

clevis:x:975:

gnome-initial-setup:x:974:

sshd:x:74:

slocate:x:21:

dip:x:40:

rngd:x:973:

tcpdump:x:72:

cristian:x:1000:

3) I edited the default config file specifying the session type:

Code:

# nano /etc/tigervnc/vncserver-config-defaults

Code:

# cat /etc/tigervnc/vncserver-config-defaults 

## Default settings for VNC servers started by the vncserver service

#

# Any settings given here will override the builtin defaults, but can

# also be overriden by ~/.vnc/config and vncserver-config-mandatory.

#

# See the following manpages for more details: vncserver(1) Xvnc(1)

#

# Several common settings are shown below. Uncomment and modify to your

# liking.



# securitytypes=vncauth,tlsvnc

# desktop=sandbox

# geometry=2000x1200

# localhost

# alwaysshared

session=gnome

4) I set a VNC password for the user that I created:

Code:

# su cristian

$ vncpasswd

5) I enabled and started the service:

Code:

# systemctl enable --now vncserver@:2

But the service is inactive:

Code:

# systemctl status vncserver@:2

● vncserver@:2.service - Remote desktop service (VNC)

  Loaded: loaded (/usr/lib/systemd/system/vncserver@.service; enabled; vendor preset: disabled)

  Active: inactive (dead) since Tue 2021-03-02 01:53:47 PST; 2min 15s ago

  Process: 38978 ExecStart=/usr/libexec/vncsession-start :2 (code=exited, status=0/SUCCESS)

 Main PID: 38984 (code=exited, status=0/SUCCESS)



Mar 02 01:53:45 localhost.localdomain systemd[1]: Starting Remote desktop service (VNC)...

Mar 02 01:53:45 localhost.localdomain systemd[1]: Started Remote desktop service (VNC).

Mar 02 01:53:47 localhost.localdomain systemd[1]: vncserver@:2.service: Succeeded.

I followed the steps here (the 5 steps above are the same steps): https://serverspace.us/support/help/...r-on-centos-8/

Should I create a config file for my service in /etc/systemd/system ?

If yes, then is this the correct template file: ?

Code:

# cat /lib/systemd/system/vncserver@.service 

# The vncserver service unit file

#

# Quick HowTo:

# 1. Add a user mapping to /etc/tigervnc/vncserver.users.

# 2. Adjust the global or user configuration. See the

#    vncsession(8) manpage for details. (OPTIONAL)

# 3. Run `systemctl enable vncserver@:<display>.service`

# 4. Run `systemctl start vncserver@:<display>.service`

#

# DO NOT RUN THIS SERVICE if your local area network is

# untrusted!  For a secure way of using VNC, you should

# limit connections to the local host and then tunnel from

# the machine you want to view VNC on (host A) to the machine

# whose VNC output you want to view (host B)

#

# [user@hostA ~]$ ssh -v -C -L 590N:localhost:590M hostB

#

# this will open a connection on port 590N of your hostA to hostB's port 590M

# (in fact, it ssh-connects to hostB and then connects to localhost (on hostB).

# See the ssh man page for details on port forwarding)

#

# You can then point a VNC client on hostA at vncdisplay N of localhost and with

# the help of ssh, you end up seeing what hostB makes available on port 590M

#

# Use "nolisten=tcp" to prevent X connections to your VNC server via TCP.

#

# Use "localhost" to prevent remote VNC clients connecting except when

# doing so through a secure tunnel.  See the "-via" option in the

# `man vncviewer' manual page.





[Unit]

Description=Remote desktop service (VNC)

After=syslog.target network.target



[Service]

Type=forking

ExecStart=/usr/libexec/vncsession-start %i

PIDFile=/var/run/vncsession-%i.pid

SELinuxContext=system_u:system_r:vnc_session_t:s0



[Install]

WantedBy=multi-user.target