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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
http://public-yum.oracle.com/repo/OracleLinux/OL7/UEKR3/x86_64/repodata/repomd.xml: [Errno 14] curl#6 – “Could not resolve host: public-yum.oracle.com; Unknown error”
Trying other mirror.
http://public-yum.oracle.com/repo/OracleLinux/OL7/latest/x86_64/repodata/repomd.xml: [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
[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
从上面的可以看到如下信息, 这给出了操作步骤。1: 是将该文件复制一份到 /etc/systemd/system 目录下并命名为 vncserver@:.service；2: 是将 <USER> 替换成你要开启 vncserver 的用户名；3: 是执行 systemctl daemon-reload；4: 是执行 systemctl enable vncserver@:.service 来启动 vncserver 服务。
# 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`
首先复制文件:
[root@oracle12c system]# cp /lib/systemd/system/vncserver@.service /etc/systemd/system/vncserver@:1.service
[root@oracle12c /]# cd /etc/systemd/system
[root@oracle12c system]# ls -lrt vnc*
-rw-r–r–. 1 root root 1744 Mar 28 10:47 vncserver@:1.service
编辑 vncserver@:1.service 文件将文件中的用 root 替换
修改前的内容如下:
[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
[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
修改后的内容如下:
[root@oracle12c system]# vi vncserver@:1.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
[Service]
Type=simple
# Clean any existing files in /tmp/.X11-unix environment
ExecStartPre=/bin/sh -c ‘/usr/bin/vncserver -kill :1 > /dev/null 2>&1 || :’
ExecStart=/sbin/runuser -l root -c “/usr/bin/vncserver :1”
PIDFile=/root/.vnc/%H:1.pid
ExecStop=/bin/sh -c ‘/usr/bin/vncserver -kill :1 > /dev/null 2>&1 || :’
[Install]
WantedBy=multi-user.target
这里重点要注意的是 Type 的值要修改为 simple, 不能用原来的 forking，否则会在执行 systemctl start vncserver@:1.service 时出现问题，故障信息如下:
[root@oracle12c system]# systemctl start vncserver@:1.service
Job for vncserver@:1.service failed. See ‘systemctl status vncserver@:1.service’ and ‘journalctl -xn’ for details.
[root@oracle12c system]# systemctl status vncserver@:1.service
vncserver@:1.service – Remote desktop service (VNC)
Loaded: loaded (/etc/systemd/system/vncserver@:1.service; enabled)
Active: failed (Result: resources) since Mon 2016-03-28 10:57:03 CST; 26s ago
Process: 11898 ExecStart=/sbin/runuser -l root -c /usr/bin/vncserver %i (code=exited, status=0/SUCCESS)
Process: 11895 ExecStartPre=/bin/sh -c /usr/bin/vncserver -kill %i > /dev/null 2>&1 || : (code=exited, status=0/SUCCESS)
3. 设置远程登陆的密码
操作系统登陆，执行 vncpasswd, 注意这个密码不一定与操作系统登陆的密码一致，需要远程桌面的所有的账号，都需要设置一次。
[root@oracle12c /]# vncpasswd root
Password:
Verify:
4. 设置 vncserver 为自启动
[root@oracle12c system]# systemctl daemon-reload
[root@oracle12c system]# systemctl enable vncserver@:1.service
[root@oracle12c system]# systemctl start vncserver@:1.service
[root@oracle12c system]# systemctl status vncserver@:1.service
vncserver@:1.service – Remote desktop service (VNC)
Loaded: loaded (/etc/systemd/system/vncserver@:1.service; enabled)
Active: active (running) since Mon 2016-03-28 13:14:47 CST; 14min ago
Process: 7237 ExecStop=/bin/sh -c /usr/bin/vncserver -kill :1 > /dev/null 2>&1 || : (code=exited, status=0/SUCCESS)
Process: 9030 ExecStartPre=/bin/sh -c /usr/bin/vncserver -kill :1 > /dev/null 2>&1 || : (code=exited, status=0/SUCCESS)
Main PID: 9080 (Xvnc)
CGroup: /system.slice/system-vncserver.slice/vncserver@:1.service
鈥 9080 /usr/bin/Xvnc :1 -desktop oracle12c:1 (root) -auth /root/.Xauthority -geometry 1024×768 -rfbwait 30000 -rfbauth /root/.vnc/passwd -rfbport 5901 -f…
Mar 28 13:14:47 oracle12c systemd[1]: Started Remote desktop service (VNC).
[root@oracle12c system]# systemctl stop vncserver@:1.service
[root@oracle12c system]# systemctl status vncserver@:1.service
vncserver@:1.service – Remote desktop service (VNC)
Loaded: loaded (/etc/systemd/system/vncserver@:1.service; enabled)
Active: inactive (dead) since Mon 2016-03-28 13:31:08 CST; 12s ago
Process: 10703 ExecStop=/bin/sh -c /usr/bin/vncserver -kill :1 > /dev/null 2>&1 || : (code=exited, status=0/SUCCESS)
Process: 9080 ExecStart=/sbin/runuser -l root -c /usr/bin/vncserver :1 (code=exited, status=0/SUCCESS)
Process: 9030 ExecStartPre=/bin/sh -c /usr/bin/vncserver -kill :1 > /dev/null 2>&1 || : (code=exited, status=0/SUCCESS)
Main PID: 9080 (code=exited, status=0/SUCCESS)
Mar 28 13:14:47 oracle12c systemd[1]: Started Remote desktop service (VNC).
Mar 28 13:31:08 oracle12c systemd[1]: Stopping Remote desktop service (VNC)…
Mar 28 13:31:08 oracle12c systemd[1]: Stopped Remote desktop service (VNC).
[root@oracle12c system]# systemctl start vncserver@:1.service
[root@oracle12c system]# systemctl status vncserver@:1.service
vncserver@:1.service – Remote desktop service (VNC)
Loaded: loaded (/etc/systemd/system/vncserver@:1.service; enabled)
Active: active (running) since Mon 2016-03-28 13:31:29 CST; 7s ago
Process: 10703 ExecStop=/bin/sh -c /usr/bin/vncserver -kill :1 > /dev/null 2>&1 || : (code=exited, status=0/SUCCESS)
Process: 10733 ExecStartPre=/bin/sh -c /usr/bin/vncserver -kill :1 > /dev/null 2>&1 || : (code=exited, status=0/SUCCESS)
Main PID: 10783 (Xvnc)
CGroup: /system.slice/system-vncserver.slice/vncserver@:1.service
鈥 10783 /usr/bin/Xvnc :1 -desktop oracle12c:1 (root) -auth /root/.Xauthority -geometry 1024×768 -rfbwait 30000 -rfbauth /root/.vnc/passwd -rfbport 5901 -…
Mar 28 13:31:29 oracle12c systemd[1]: Starting Remote desktop service (VNC)…
Mar 28 13:31:29 oracle12c systemd[1]: Started Remote desktop service (VNC).
5. 关闭 Oracle Linux 的防火墙
root 用户执行操作
查看防火墙状态。
[root@oracle12c tmp]# systemctl status firewalld
firewalld.service – firewalld – dynamic firewall daemon
Loaded: loaded (/usr/lib/systemd/system/firewalld.service; enabled)
Active: active (running) since Mon 2016-03-28 14:51:40 CST; 6s ago
Main PID: 14827 (firewalld)
CGroup: /system.slice/firewalld.service
14827 /usr/bin/python -Es /usr/sbin/firewalld –nofork –nopid
临时关闭防火墙命令。重启电脑后，防火墙自动起来。
[root@oracle12c tmp]# systemctl stop firewalld
永久关闭防火墙命令。重启后，防火墙不会自动启动。
[root@oracle12c tmp]# systemctl disable firewalld
rm ‘/etc/systemd/system/basic.target.wants/firewalld.service’
rm ‘/etc/systemd/system/dbus-org.Fedoraproject.FirewallD1.service’
6. 使用 vnc viewer 进行远程连接
CentOS 6.5 安装 VNC Server 实现图形化访问 http://www.linuxidc.com/Linux/2015-12/126262.htm
VNC 的安装配置 http://www.linuxidc.com/Linux/2013-05/84941.htm
CentOS 6.3 安装和配置 VNC http://www.linuxidc.com/Linux/2013-05/84668.htm
Linux 下强制不检测依赖安装 VNC http://www.linuxidc.com/Linux/2013-05/84075.htm
CentOS6 VNC 服务安装配置 http://www.linuxidc.com/Linux/2013-04/82510.htm
CentOS 下 VNC 配置和安装 http://www.linuxidc.com/Linux/2013-05/83975.htm
VNC 远程控制安装和设置 http://www.linuxidc.com/Linux/2013-01/77769.htm
Windows 通过 VNC 访问 Ubuntu http://www.linuxidc.com/Linux/2012-10/73043.htm
Windows 远程桌面访问 Ubuntu 12.04 之安装 VNC http://www.linuxidc.com/Linux/2012-07/64801.htm
本文永久更新链接地址 ：http://www.linuxidc.com/Linux/2016-03/129613.htm
