今天在一台Linux虚拟机上安装了一个ArcGIS Server For Linux(只ArcSOC)组件，一切正常，但是启动服务的时候报一下的错误：
[root@rhsde scripts]# ./startserver
Starting ArcGIS Server...
Monitor process started..
This process will continue to run even after the ArcGIS Server
is shut down. Please run the stopmonitor to shutdown this process
if necessary.
Starting Xvfb on port 600
Unable to start Xvfb on port 600.
Starting Xvfb on port 601
Unable to start Xvfb on port 601.
Starting Xvfb on port 602
Unable to start Xvfb on port 602.
Starting Xvfb on port 603
Unable to start Xvfb on port 603.
Starting Xvfb on port 604
Unable to start Xvfb on port 604.
Starting Xvfb on port 605
Unable to start Xvfb on port 605.
Starting Xvfb on port 606
Unable to start Xvfb on port 606.
Starting Xvfb on port 607
Unable to start Xvfb on port 607.
Starting Xvfb on port 608
Unable to start Xvfb on port 608.
Starting Xvfb on port 609
Unable to start Xvfb on port 609.
Starting Xvfb on port 610
Unable to start Xvfb on port 610.
Starting Xvfb on port 611
Unable to start Xvfb on port 611.
Starting Xvfb on port 612
Unable to start Xvfb on port 612.
Starting Xvfb on port 613
Unable to start Xvfb on port 613.
Starting Xvfb on port 614
Unable to start Xvfb on port 614.
Starting Xvfb on port 615
Unable to start Xvfb on port 615.
Starting Xvfb on port 616
Unable to start Xvfb on port 616.
Starting Xvfb on port 617
Unable to start Xvfb on port 617.
Starting Xvfb on port 618
Unable to start Xvfb on port 618.
Starting Xvfb on port 619
Unable to start Xvfb on port 619.
从错误上看是无法启动Xvfb进程，具体原因不详，到$AGSHOME/servercore/.Server/Init_Xvfb.sh中查看启动Xvfb的函数，修改ags_xvfb_log变量到/tmp/xvfb.log，将错误信息记录到/tmp/xvfb.log文件中。再次启动服务，发现xvfb.log中记录如下信息：
Cannot establish any listening sockets - Make sure an X server isn't already running
Couldn't open RGB_DB '/usr/X11R6/lib/X11/rgb'
_XSERVTransSocketUNIXCreateListener: ...SocketCreateListener() failed
_XSERVTransMakeAllCOTSServerListeners: server already running
Fatal server error:
Cannot establish any listening sockets - Make sure an X server isn't already running
Couldn't open RGB_DB '/usr/X11R6/lib/X11/rgb'
_XSERVTransSocketUNIXCreateListener: ...SocketCreateListener() failed
_XSERVTransMakeAllCOTSServerListeners: server already running
Fatal server error:
Cannot establish any listening sockets - Make sure an X server isn't already running
Couldn't open RGB_DB '/usr/X11R6/lib/X11/rgb'
_XSERVTransSocketUNIXCreateListener: ...SocketCreateListener() failed
_XSERVTransMakeAllCOTSServerListeners: server already running
Fatal server error:
Cannot establish any listening sockets - Make sure an X server isn't already running
原来是X Server已经启动了一个实例，到/tmp将 .X11-unix目录删除掉，继续启动服务，还是报同样的错误，继续查看/tmp/xvfb.log文件，发现错误发生了如下的变化：
Couldn't open RGB_DB '/usr/X11R6/lib/X11/rgb'
_XSERVTransmkdir: Owner of /tmp/.X11-unix should be set to root
Could not init font path element /usr/X11R6/lib/X11/fonts/misc/, removing from list!
Could not init font path element /usr/X11R6/lib/X11/fonts/TTF/, removing from list!
Could not init font path element /usr/X11R6/lib/X11/fonts/Type1/, removing from list!
Could not init font path element /usr/X11R6/lib/X11/fonts/CID/, removing from list!
Could not init font path element /usr/X11R6/lib/X11/fonts/75dpi/, removing from list!
Could not init font path element /usr/X11R6/lib/X11/fonts/100dpi/, removing from list!
原来是缺少文件，从别的机器上将这些文件拷贝过来后，重启启动服务后，成功。在此简记一下。
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