Using VNC to connect CentOS7 Remote Desktop under Windows

When actually maintaining the remote Linux Server host, sometimes the pure command line mode may not meet our needs, this time need to use the remote host GUI mode, that can see the server's desktop, generally use two ways: Xmanager or VNC. I started with Xmanager, version is Xmanager5 Enterprise, but in connection with the server, you can connect (already see the host name), but unable to open the desktop, tossing a long time finally give up, choose VNC, in contrast convenient many. Below the summary of their own practical experience, the need for friends can see.
Description under I here the CentOS host has installed the GoHome desktop, not installed please install a GUI desktop.

First, the Linux host installs the VNC service 1, installs the Vnc-server

VNC is divided into servers and clients, Linux server hosts need to install VNCSERVER,CENTOS7 under general use TIGERVNC.
Execute command under root:

#yum-y tigervnc-server

Configuration is required after the installation is complete.

2, Configuration Vnc-server

Go to Catalog

#cd /lib/systemd/system#ls

We will see a service called [email protected], which is the VNC service we need. However, it needs to be configured before it can be used. Assuming that we are currently configuring Remote Desktop for the root user, the configuration process is as follows:

First, copy the service, named [email Protected]:1.service,

#cpvncserver@.service [email protected]:1.service

then modify [email Protected]:1.service

#vivncserver@:1.service

See the following text:

[Unit]
Description=remote Desktop Service (VNC)
After=syslog.target Network.target

[Service]
Type=forking
# Clean any existing files in/tmp/. X11-unix Environment
Execstartpre=/bin/sh-c '/usr/bin/vncserver-kill%i >/dev/null 2>&1 | | :’
Execstart=/sbin/runuser-l < user>-C "/usr/bin/vncserver%i"
pidfile=/home/< User>/.vnc/%h%i.pid
Execstop=/bin/sh-c '/usr/bin/vncserver-kill%i >/dev/null 2>&1 | | :’

[Install]
Wantedby=multi-user.target

Here, and only one substitution is needed: Replace < user> with the user that needs to be configured. Note that because Root's home directory is/root/, not/home/root/, the following text is replaced:

[Unit]
Description=remote Desktop Service (VNC)
After=syslog.target Network.target

[Service]
Type=forking
# Clean any existing files in/tmp/. X11-unix Environment
Execstartpre=/bin/sh-c '/usr/bin/vncserver-kill%i >/dev/null 2>&1 | | :’
Execstart=/sbin/runuser-l root-c "/usr/bin/vncserver%i"
Pidfile=/root/.vnc/%h%i.pid
Execstop=/bin/sh-c '/usr/bin/vncserver-kill%i >/dev/null 2>&1 | | :’

[Install]
Wantedby=multi-user.target

If a non-root user, such as user admin,pidfile, should be:

Execstart=/sbin/runuser-l admin-c "/usr/bin/vncserver%i"
Pidfile=/home/admin/.vnc/%h%i.pid

Finally Esc+:wq save exit.

3. Start Vnc-server

In the configuration file just now, there is a description:

# Quick HowTo:
# 1. Copy This file To/etc/systemd/system/[email protected]:.service
# 2. Edit and Vncserver parameters appropriately
# ("Runuser-l-c/usr/bin/vncserver%i-arg1-arg2")
# 3. Run systemctl daemon-reload
# 4. Run ' systemctl enable [email protected]:.service

When the configuration is complete, you also need to perform

#systemctl daemon-reload#systemctl enable [email protected]:1.service

Then turn on the VNC service

#systemctlstartvncserver@:1.service

To see if the launch was successful

#systemctlstatusvncserver@:1.service

If real active means to be successful. Below, set the VNC connection password,
Perform

#vncpassword

Prompt to enter the password and confirm that this is for remote connection when the authentication, you can set a bit. After configuration, you can restart the VNC service.

#systemctlrestartvncserver@:1.service

4. Configure the Firewall

The VNC service is turned on, but if the remote client needs to connect, additional configuration for the firewall is required to open the port. The general VNC service is to use 590+X as the access port, X for the configured [email protected]:x, such as [email protected]:1.service here], the port is 5901.
Execute command

#vi /etc/sysconfig/iptables

In

-A input-p tcp-m state–state new-m tcp–dport 22-j ACCEPT

Add configuration Below

-A input-p tcp-m state–state new-m tcp–dport 5901-j ACCEPT

Then save the exit and restart the firewall. Here the basic VNC server configuration is over.

Second, the Client remote connection

Once you have configured the service-side VNC service, you can connect remotely. Here is the use of Win7 under the connection, the client is using tigervnc-1.5.0, Baidu under the general have, after downloading the direct installation, the installation process can be removed as the service side of the check, but it doesn't matter. After entering the installation directory, find Vncviewer.exe, double-click Execute, enter the IP and port number, click Connection, and then follow the prompts to enter the previously configured access password, enter, you can see the remote Linux host desktop.

Three, open multiple Vncserver

Sometimes we may need more than one user's desktop environment, such as when I am remotely installing Oracle, I also need an Oracle user's desktop environment, but previously only configured the root user, the following describes the configuration of multi-user vncserver. Configuration idea is simple, is to configure multiple [email protected]:n.service.

1. Copy [email protected]

Assuming that our users are already established, here's an example of admin. First log in as root,

#cd /lib/systemd/system

directory, as described above, copy the configuration file, but this is not: 1, but: 2, the number can be set by itself, generally increment.

#cpvncserver@.service [email protected]:2.service

then modify [email Protected]:2.service

#vivncserver@:2.service

Modify Configuration

[Unit]
Description=remote Desktop Service (VNC)
After=syslog.target Network.target

[Service]
Type=forking
# Clean any existing files in/tmp/. X11-unix Environment
Execstartpre=/bin/sh-c '/usr/bin/vncserver-kill%i >/dev/null 2>&1 | | :’
Execstart=/sbin/runuser-l admin-c "/usr/bin/vncserver%i"
Pidfile=/home/admin/.vnc/%h%i.pid
Execstop=/bin/sh-c '/usr/bin/vncserver-kill%i >/dev/null 2>&1 | | :’

[Install]
Wantedby=multi-user.target

Save exit. Then follow the configuration file prompts to execute

#systemctl daemon-reload#systemctl enable [email protected]:2.service

2. Modify the VNC login authentication password

After execution, switch to admin account and execute

$vncserver :2

Will ask for a verification password

You'll require a password to access your desktops.

Password:
Verify:
xauth:file/home/admin/. Xauthority does not exist

New ' localhost.localdomain:2 (admin) ' Desktop is Localhost.localdomain:2

Creating default startup Script/home/admin/.vnc/xstartup
Starting applications specified In/home/admin/.vnc/xstartup
Log file Is/home/admin/.vnc/localhost.localdomain:2.log

3. Start the service

Then switch back to root and execute

#systemctl deamon-reload#systemctl start [email protected]:2.service

When the prompt starts unsuccessfully, execute the command

#vncserver:2

Tip There is already a vncserver as:2 running, this time we want to kill this process, execute the command

#vncserver-kill:2

But generally no use, then we

# ps -ef | grep vnc

To view the process ID of the vncserver:2, such as PID 1311, execute

#kill -9 1311

And then execute

#systemctlstartvncserver@:2.service

Or an error, check the log,

#journalctl -xn

Tip You need to delete/tmp/. X2-lock
Perform

#rm /tmp/.X2-lock

Start again

#systemctlstartvncserver@:2.service

or error, check the log, prompted to delete/tmp/. X11-unix/x2
Perform

#rm /tmp/.X11-unix/X2

Start again

#systemctlstartvncserver@:2.service

Finally no error, then check the status

#systemctlstatusvncserver@:2.service

Discovery has started, then complete. Then be careful not to forget to configure the firewall as described above.

End all the configuration, in the actual startup process may encounter a variety of problems, as long as the quiet to view the log, generally can be resolved. Where there is a mistake, I also hope to correct it.

Finally, recommend a good article: CentOS7 installation configuration VNC.

Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.

Connect CentOS7 Remote Desktop using VNC under Windows