bios basic i/o system
network interface disk partition
http://www.upantool.com/sense/2014/4679_4.html
http://jingyan.baidu.com/article/bea41d43887dc4b4c51be6fe.html?st=2&os=0&bd_page_type=1&net_type=2
Since the boot strategies of Linux and Windows systems are different, it is recommended that Windows (win7 64-bit, win8 all systems, and all win10 systems) booted by UEFI only install dual systems, otherwise it may not start normally.
Solution for forgetting username and login password under Ubuntu
http://www.jb51.net/os/Ubuntu/164636.html
Reboot, press ESC to enter Boot Menu, select recovery mode (usually the second option).
2. Use cat /etc/shadow at the # prompt to see the username.
3. Enter passwd "username" (quotes are required).
4. Enter a new password.
5. Restart and log in with the new password.
Solution for win7 cannot start after ubuntu and win7 dual system installation
http://blog.chinaunix.net/uid-29173826-id-3925053.html
Another system downloaded:
http://www.xitongzhijia.net/win7/201609/84514.html#download
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Install Gnome Graphical Desktop on Ubuntu Server
http://www.cnblogs.com/sbaicl/archive/2013/01/09/2853174.html
How does easybcd restore ubuntu boot
https://zhidao.baidu.com/question/1384822727146301620.html
u start pe system windows startup repair tool tutorial
http://www.uqidong.com/syjc/1301.html
If you are an ordinary user, modify your own password, use: passwd, it will let you enter your old password first, and then enter the new password twice.
If you are root, use: password username, you can change the password of username, just enter the new password twice, you don't need to enter the old password.
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The purpose is to install another system ubuntu server, first install a preview on the u disk, and check the installation tutorial of ubuntu desktop:
http://www.linuxidc.com/Linux/2016-04/130520.htm
There is a: Try ubuntu without installing option, I thought that this option also exists in ubuntu server...
The tutorial mentions the tool: Universal USB Installer ( a tool that can install the Linux operating system on a USB stick )
But according to the operation, after the system U disk is started, the page is:
The ubuntu server is not installed in the u disk, and as mentioned in the following tutorial, the u disk is a "boot disk" as a boot
http://www.upantool.com/sense/2014/4679.html
According to the tutorial, finally exit the u disk, restart (there is no instruction to change the boot to the hard disk option), instead of entering grub, it alarms (di di di...), repeat the operation, and finally the grub selection interface appears: (1 ) ubuntu (2) advanced unbuntu (3) window, but there are still many problems:
(1) Select the ubuntu option, cannot enter the normal login command line..., sometimes it will alarm under repeated operations
(2) Select the advanced ubuntu option, select the recovery model, the options inside can be operated, but many characters are one by one (.........)
(3) window option, startup failed...
Finally, using "Rainbow Wind U Disk Boot Tool V7.0", repaired the booting of windows..., win was successfully started, but ubuntu did not know where to go, isn't it also installed? Why no grub option!
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The installation process operation is not recorded (lazy)
1. There is no ethx network card information under the ifconfig -a command
(1) Ifconfig can see this is to see the information of the network card started by the current system, similar to eth0 eth1, etc.
If it is not started, you can go to /etc/sysconfig/network-scripts to see the configuration file (if there is ifcfg-eth0 or ifcfg-eth1) and use ifup eth0 to start the network card
If not, the driver is not installed.
(2) /etc/sysconfig/* is the service initialization environment configuration file under the Red Hat system. The ubuntu I use does not have this folder. I can only find the storage location of each service separately, such as /etc/sysconfig/ in centos. The network corresponds to the /etc/network/interfaces file in ubuntu...,
(3) Configure the network card eth0 in this file
(3.0) Configuration information: http://www.360doc.com/content/13/0116/21/1317564_260601826.shtml
(3.1) The file is read-only (3.2) chmod cannot change permissions
(3.3) Ways to quit: http://blog.csdn.net/lmikic/article/details/47727443
OK Use sudo vi command to edit read-only text
Some operations after the configuration is complete
http://jingyan.baidu.com/article/f25ef25414e8ea482d1b8265.html
http://blog.sina.com.cn/s/blog_6c9d65a101011pyt.html
(3.4) But executing ifconfig eth0 up prompts that there is no such device
(3.5) Execute sudo dmesg | grep eth and find that it has been renamed
The premise of doing the above operations is to make sure that there is a network card in the system, and the above series of operations are configured with a wired network card
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