DBA，在创建Oracle数据库的过程中一般要使用dbca和netca图像化进行建库和创建监听（如果使用脚本建库另说），所以图形化操作工具是必不可少的，在Linux操作系统中个人比较喜欢的图形化操作软件是VNC，今天刚好遇到了Oracle Linux 7的操作环境，就顺手记录一下配置过程。
1.检查系统是否已经安装vncserver软件包
[root@oracle12c ~]# rpm -qa|grep tigervnc
tigervnc-server-minimal-1.2.80-0.30.20130314svn5065.el7.x86_64
tigervnc-license-1.2.80-0.30.20130314svn5065.el7.noarch
没有安装执行以下命令进行安装
[root@oracle12c Packages]# pwd
/run/media/yong/OL-7.0 Server.x86_64/Packages
[root@oracle12c Packages]# yum -y install tigervnc-server-1.2.80-0.30.20130314svn5065.el7.x86_64.rpm
Loaded plugins: langpacks
Examining tigervnc-server-1.2.80-0.30.20130314svn5065.el7.x86_64.rpm: tigervnc-server-1.2.80-0.30.20130314svn5065.el7.x86_64
Marking tigervnc-server-1.2.80-0.30.20130314svn5065.el7.x86_64.rpm to be installed
Resolving Dependencies
--> Running transaction check
---> Package tigervnc-server.x86_64 0:1.2.80-0.30.20130314svn5065.el7 will be installed
--> Finished Dependency Resolution
: [Errno 14] curl#6 - "Could not resolve host: public-yum.oracle.com; Unknown error"
Trying other mirror.
: [Errno 14] curl#6 - "Could not resolve host: public-yum.oracle.com; Unknown error"
Trying other mirror.
Dependencies Resolved
=======================================================================================================================================================================
Package Arch Version Repository Size
=======================================================================================================================================================================
Installing:
tigervnc-server x86_64 1.2.80-0.30.20130314svn5065.el7 /tigervnc-server-1.2.80-0.30.20130314svn5065.el7.x86_64 488 k
Transaction Summary
=======================================================================================================================================================================
Install 1 Package
Total size: 488 k
Installed size: 488 k
Downloading packages:
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Installing : tigervnc-server-1.2.80-0.30.20130314svn5065.el7.x86_64 1/1
Verifying : tigervnc-server-1.2.80-0.30.20130314svn5065.el7.x86_64 1/1
Installed:
tigervnc-server.x86_64 0:1.2.80-0.30.20130314svn5065.el7
Complete!
2.配置vncserver,之前的版本，如果安装vnc一般都需要使用vncserver命令来设置口令，然后配置/etc/sysconfig/vncservers文件。在Oracle Linux7中，虽然然还存在这个文件，不过其内容只有如下一行：
[root@oracle12c /]# cat /etc/sysconfig/vncservers
# THIS FILE HAS BEEN REPLACED BY /lib/systemd/system/vncserver@.service
先来看一下该文件/lib/systemd/system/vncserver@.service的内容
[root@oracle12c system]# cat /lib/systemd/system/vncserver@.service
# The vncserver service unit file
#
# Quick HowTo:
# 1. Copy this file to /etc/systemd/system/vncserver@:.service
# 2. Edit and vncserver parameters appropriately
# ("runuser -l <USER> -c /usr/bin/vncserver %i -arg1 -arg2")
# 3. Run `systemctl daemon-reload`
# 4. Run `systemctl enable vncserver@:.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