dhcp 服务器也支持 ipv6 服务。
ifconfig eth0
eth0 Link encap:Ethernet HWaddr: 00:21:85:d3:a3:36
inet addr:10.16.31.183 broadcast:10.16.31.255 netmask:255.255.255.0
inet6 addr: fe80::221:85ff:fed3:a336/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
关于ipv6的其他配置：
$ cd /proc/sys/net/ipv6/conf/all
$ grep "" disable_ipv6 forwarding autoconf
disable_ipv6:0
forwarding:1
autoconf:1
有什么办法可以解决这个问题吗？
我想将 java 环境更改为 java-6-openjdk。
/etc/环境：
PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games"
JAVA_HOME=/usr/lib/jvm/java-6-openjdk/
CLASSPATH=.:$CLASSPATH:$JAVA_HOME/lib
爪哇版本：
java version "1.6.0_20"
OpenJDK Runtime Environment (IcedTea6 1.9.5) (6b20-1.9.5-0ubuntu1~10.04.1)
OpenJDK 64-Bit Server VM (build 19.0-b09, mixed mode)
javac-版本：javac 1.6.0_20
但是在 shell 中：结果是/usr/lib/jvm/java-6-sun-1.6.0.22
而结果是/usr/lib/jvm/java-6-sun-1.6.0.22/lib。echo $JAVA_HOME$CLASSPATH
如何找到 由位置设置$JAVA_HOME&$CLASSPATH值的其他文件java-6-sun-1.6.0.22？
默认 DNS 服务器运行速度太慢，因此我通过添加名称服务器更改了配置。
/etc/resolv.conf ：
nameserver 202.102.192.68
nameserver 210.45.240.99
domain ***edu.cn
search ***edu.cn
但是文件会在一段时间后自动更改回默认值。
有什么方法可以解决这个问题吗？
谢谢！
添加太多壁纸后，壁纸管理工具Drapes崩溃。Drapes无法启动。我想修改或清理记录添加壁纸路径的文件，但我找不到使用locate drapes.
感谢任何建议。
我以前用“-opengl”选项启动游戏，冰封王座（使用wine）。当我进入游戏时，分辨率会改变，退出游戏后会恢复。
但这一次出现了问题。虽然我重新启动了几次计算机，但分辨率无法恢复。Ubuntu 窗格和登录窗口都非常出色。
nvidia-settings还检测到分辨率是“1024 x 768”，但是用这个工具好像没用。截图-NVIDIA X 服务器设置：
xrandr的结果：
Screen 0: minimum 320 x 240, current 1024 x 768, maximum 1024 x 768
default connected 1024x768+0+0 0mm x 0mm
1024x768 50.0*
800x600 51.0 52.0 53.0
680x384 54.0 55.0
640x480 56.0
576x432 57.0
512x384 58.0
400x300 59.0 60.0 61.0
320x240 62.0
/etc/X11/xorg.conf 的配置：
# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings: version 1.0 (buildd@yellow) Fri Apr 9 11:51:21 UTC 2010
Section "ServerLayout"
Identifier "Layout0"
Screen 0 "Screen0" 0 0
InputDevice "Keyboard0" "CoreKeyboard"
InputDevice "Mouse0" "CorePointer"
Option "Xinerama" "0"
EndSection
Section "Files"
EndSection
Section "InputDevice"
# generated from default
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "auto"
Option "Device" "/dev/psaux"
Option "Emulate3Buttons" "no"
Option "ZAxisMapping" "4 5"
EndSection
Section "InputDevice"
# generated from default
Identifier "Keyboard0"
Driver "kbd"
EndSection
Section "Monitor"
# HorizSync source: builtin, VertRefresh source: builtin
Identifier "Monitor0"
VendorName "Unknown"
ModelName "CRT-0"
HorizSync 28.0 - 55.0
VertRefresh 43.0 - 72.0
Option "DPMS"
EndSection
Section "Device"
Identifier "Device0"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "Entry Graphics"
EndSection
Section "Screen"
# Removed Option "metamodes" "1024x768 +0+0"
Identifier "Screen0"
Device "Device0"
Monitor "Monitor0"
DefaultDepth 24
Option "TwinView" "0"
Option "TwinViewXineramaInfoOrder" "CRT-0"
Option "metamodes" "1024x768_60 +0+0"
SubSection "Display"
Depth 24
EndSubSection
EndSection
可能重复：
如何创建截屏视频？
我一直在寻找一种工具来记录我的桌面。有人向我推荐RecordItNow。但我发现它是为 KDE 制作的，工具有时会崩溃。
谁能推荐一个更适合GNOME的应用程序以视频的形式录制屏幕。
似乎如果我选择桌面进行输出，将没有文件转换。所以我使用 bash 脚本更改了一些内容。
#!/bin/bash
VIDEO=$(zenity --file-selection)
mencoder ${VIDEO} -o ./output.avi -oac lavc -lavcopts acodec=libfaac:abitrate=128 ovc lavc -lavcopts vcodec=mpeg4:vbitrate=4000
错误：Audio LAVC, couldn't find encoder for codec libfaac.
已完成的错误：
MEncoder SVN-r1.0~rc3+svn20090426-4.4.3 (C) 2000-2009 MPlayer Team
success: format: 0 data: 0x0 - 0xdf2a8e
[Ogg] stream 1: video (Theora v3.2.1), -vid 0
[Ogg] stream 2: audio (Vorbis), -aid 0
Ogg file format detected.
VIDEO: [theo] 1440x896 24bpp 15.000 fps 0.0 kbps ( 0.0 kbyte/s)
[V] filefmt:18 fourcc:0x6F656874 size:1440x896 fps:15.000 ftime:=0.0667
==========================================================================
Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders
AUDIO: 22050 Hz, 1 ch, s16le, 90.0 kbit/25.51% (ratio: 11248->44100)
Selected audio codec: [ffvorbis] afm: ffmpeg (FFmpeg Vorbis)
==========================================================================
Opening video filter: [expand osd=1]
Expand: -1 x -1, -1 ; -1, osd: 1, aspect: 0.000000, round: 1
==========================================================================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
VDecoder init failed :(
Opening video decoder: [theora] Theora/VP3
VDec: vo config request - 1440 x 896 (preferred colorspace: Planar YV12)
VDec: using Planar YV12 as output csp (no 0)
Movie-Aspect is 1.61:1 - prescaling to correct movie aspect.
videocodec: libavcodec (1440x896 fourcc=34504d46 [FMP4])
Selected video codec: [theora] vfm: theora (Theora (free, reworked VP3))
==========================================================================
Exiting...
Ogg stream 0 is of an unknown type
[theora @ 0x24e8800]Missing extradata!
Could not open codec.
Audio LAVC, couldn't find encoder for codec libfaac.
有一个名为 的输出文件output.avi，但是不能播放ogv。可以更改输出格式吗？
系统信息：
Ubuntu SMP Thu Sep 16 16:05:42 UTC 2010 x86_64 GNU/Linux
虚拟游行：
VirtualBox 3.1.6_OSE r59338 linux.amd64
我想在Virtual Box中安装一个带有x86-64的虚拟系统，但似乎不可能做到这一点。
虚拟机提示我它只检测到 i686 CPU。
主机架构与客户端虚拟操作系统架构之间是否存在联系？
kvm-ok结果：
INFO: Your CPU supports KVM extensions
INFO: /dev/kvm does not exist
HINT: sudo modprobe kvm_amd
KVM acceleration can NOT be used
sudo modprobe kvm_amd结果
FATAL: Error inserting kvm_amd (/lib/modules/2.6.32-24-server/kernel/arch/x86/kvm/kvm-amd.ko): Operation not supported
kvm-ok再次：
INFO: Your CPU supports KVM extensions
INFO: KVM is disabled by your BIOS
HINT: Enter your BIOS setup and enable Virtualization Technology (VT), and then hard poweroff/poweron your system
KVM acceleration can NOT be used
但是另一个问题发生了，VirtualBox 显示了一个错误窗口：
VT-x/AMD-V hardware-acceleration has been enabled,but it is in the ineffective status. So the VirtualBox won't detect the CPU of 64bit,and fail to start.Please confirm the support has been enabled.
如何检查 CPU 是否支持该VT-x/AMD-V技术？并在 BIOS 中启动它？但是另一个虚拟操作系统（32 位）也启用了该技术，并且运行良好。