Category Archives: How to Fix

KVM–Host does not support any virtualization…

Phenomenon: When virt-install creates a new virtual machine, prompt Host does not support any Virtualization options.
environment: CentOS7, KVM, CPU: Intel(R) Xeon(R) CPU e5-2609,
qemu-kvm, qemu-kvm-tools, virt-manager, libvirt virt-install four major components have been normally installed,
selinux has been closed, iptables have been fully released,
processing steps:
1. General step, advanced BIOS to see whether the CPU is on virtualization, confirm that
2, grep-e ‘(VMX | SVM)’ /proc/cpuinfo, check whether there is echo information, found that there is, also means that step 1 is not blind. Grep KVM
3, dmesg |, grep KVM, the actual function is the same as step 1 and step 2, confirm again whether the host supports virtualization, if not, KVM :disabled by BIOS will be displayed, here I do not have any echo. 4. At this point, the usual solutions on baidu and Google have come to an end and the problem has not been solved… Only themselves to think of a way, here a little fooling around step ten thousand steps.
5, systemctl status libvirtd suddenly found that there was an error in the libvirt log:
internal error: Failed to probe QEMU binary with QMP: /usr/libexec/ qem-kvm: relocation error: /lib64/ libspy-server. so.1
.
6, baidu learned that spice server is provided as a library for qemu use, compiled is libspice server.
, however, is a completely unknown thing to debug and debug, so let’s see if qemu- KVM has any problems.
7, ll /usr/libexec/qemu- KVM first see if qemu- KVM has execution permissions, found that there is, then normal.
8, /usr/libexec/qemu-kvm –version run manually, find error:
version libssl.so.10 not defined in file libssl.so.10
9, still get the solution through baidu solution:
/usr/libexec/qemu-kvm –version normal display version
virt-install
failure solved successfully!
/usr/libexec/qemu-kvm –version
virt-install
failure solved! Thank:

https://blog.51cto.com/506554897/1972914 http://bbs.chinaunix.net/thread-3691547-1-1.html

Reproduced in: https://blog.51cto.com/7308842/2395997

Error, some other host already uses address (How to Fix)

Today, I suddenly can’t connect the virtual machine, Error, some other host already USES address Error, other IP or such Error, fortunately, a search on the Internet found the solution is as follows:1. Vim /etc/sysconfig/network-scripts/ifup-eth modify configuration files

2, comment out this IP judgment can be quickly located through /arping

3. Save, exit and restart the network card
The service network restart
Note: Use the SED feature to find it
Data search and display
Search for lines with the root keyword in /etc/passwd

nl /etc/passwd | sed '/root/p'
1  root:x:0:0:root:/root:/bin/bash
1  root:x:0:0:root:/root:/bin/bash
2  daemon:x:1:1:daemon:/usr/sbin:/bin/sh
3  bin:x:2:2:bin:/bin:/bin/sh
4  sys:x:3:3:sys:/dev:/bin/sh
5  sync:x:4:65534:sync:/bin:/bin/sync
....

If root finds it, it prints the matching row in addition to all the rows.
With -n, only the lines containing the template will be printed.

nl /etc/passwd | sed -n '/root/p'
1  root:x:0:0:root:/root:/bin/bash

#nl ifup-eth | sed-n ‘/arping/p’ 216 line 245 line WFTW)

Problems with vue project installation No ESLint configuration found

Error No ESLint configuration found occurs when ESLint is selected when installing vue project with low version scaffold. The solution is as follows:
npm init -ynpm install eslint –save-dev./node_modules/.bin/eslint –init
The problem with No ESLint Configuration Found was resolved after the above three steps, but there will be other errors, so if there is a. Eslintrc.js file in the project, change it to the following. If there is No file created, write the following code:

module.exports = {
  root: true,
  parserOptions: {
    parser: 'babel-eslint'
  },
  env: {
    browser: true,
  },
  extends: [
    error-prevention
   
    'plugin:vue/essential', 
   
    'standard'
  ],
  
  plugins: [
    'vue'
  ],
  
  rules: {
    
    'generator-star-spacing': 'off',
    
    'no-debugger': process.env.NODE_ENV === 'production' ?'error' : 'off'
  }
}

There’s nothing wrong with running a project now! ✌ ️ ✌ ️ ✌ ️ ✌ ️ ✌ ️ ✌ ️

Thoroughly solve mysql error: 1030,’Got error 28 from storage engine’

To tell you the truth, online articles are the same, no one can solve, all is to say that the memory is good, but there is no teaching can not clean the small white… = =
The problem is that the server system is full, and the temporary file directory specified by mysql is full, which is roughly what this means.
Now let’s solve the problem that /dev/vda1 is full, and I actually have no idea where /dev/vda1 is or what it is, but I later learned that this is a virtio-block type device.
Talk about it:

A line beginning with ‘c’ indicates that the device is a character device, and a line beginning with ‘b’ indicates that it is a block device.
/dev/vda and /dev/vDB are both virtio-block devices, while /dev/sda is an SD, or SCSI, device.  

On the whole!
First login server: Execute DF-H means:
Check the disk usage space of a server, and find that the disk has been used 100%(this is the graph after I solved the problem, it has been restored to normal, the remaining 42% is enough).

1, CD to the root directory, du-sh * to see which directory takes up a lot of space, some up to a dozen G, so you should keep an eye on this directory

2, CD takes up a lot of memory directory, continue du-sh *
Found data directory incredibly 15G, enter the data directory: CD data
Then look for the large file:

File search command:

find -size +100M
This means to find files larger than 100M. M is Megabyte

You can also query the folder footprint to show the total space occupied by the directory:

Use: DU-h –max-depth=1/path
For example, du-h –max-depth=1 /var
This is to see which folder takes up the most memory in the directory

If you want to locate a large file:

ls -lhS
This is to display the file from large to small

3. Repeat the first two steps and decide whether to delete or remove them according to the actual situation
 
4. You can clear the log if it is too large

Run command:
cat /dev/null > file.log

Pro test, catalina.out in mysql folder can be deleted, execute:

echo “” > catalina.out

This log file is usually large.
5, if the package is too large, do not need to be able to uninstall
Perform unload

Rmp-e software name

Or delete

Rm-rf folder name

 
6, the large file is almost deleted, again DF-H, disk space can be reserved for a little half, absolutely perfect solution to the mysql 1030 problem!
 
 

Error: Can’t bind the tftp port! Solution


Use tftpd32..
Can’t bind the TFTP port!
Can’t bind the TFTP port! Either you do not have necessary privilege or a TFTP daemon is already started.
the solution is simple:
just run the regedit, open the registry,
HKEY_LOCAL_MACHINE -> SOFTWARE – & gt; TFTPD32, delete the entire TFTPD32 folder.
go to open tftpd32. Exe is normal.

(Windows+xrdp+ubuntu16.04) Remote server error: “password failed error-problem connecting”

Don’t be long-winded, give the problem and solution directly.

Problems that arise

The solution
Modify /etc/xrdp/sesman.ini

    open file /etc/xrdp/sesman.ini
sudo vim /etc/xrdp/sesman.ini

sesman.ini file contents are as follows:

[Globals]
ListenAddress=127.0.0.1
ListenPort=3350
EnableUserWindowManager=1
UserWindowManager=startwm.sh
DefaultWindowManager=startwm.sh

[Security]
AllowRootLogin=1
MaxLoginRetry=4
TerminalServerUsers=tsusers
TerminalServerAdmins=tsadmins

[Sessions]
X11DisplayOffset=10
MaxSessions=10
KillDisconnected=0
IdleTimeLimit=0
DisconnectedTimeLimit=0

[Logging]
LogFile=/var/log/xrdp-sesman.log
LogLevel=DEBUG
EnableSyslog=0
SyslogLevel=DEBUG

[X11rdp]
param1=-bs
param2=-ac
param3=-nolisten
param4=tcp

[Xvnc]
param1=-bs
param2=-ac
param3=-nolisten
param4=tcp
param5=-localhost
param6=-dpi
param7=96
    under [Xvnc] param8= -securitytypes and param9=None
[Xvnc]
param1=-bs
param2=-ac
param3=-nolisten
param4=tcp
param5=-localhost
param6=-dpi
param7=96
param8=-SecurityTypes
param9=None
    restart XRDP service 
sudo service xrdp restart

Solution to Error 400. The request has an invalid header name

I encountered this problem today, and then Searched baidu, Bing and Google. I saw many blogs that wrote about this problem. To be honest, it was not helpful at all, so I spent 2 hours to find the reason by myself. The reason for this error is very simple. The reason for this error is that the header part is wrong. may be the direct cause of the error, as some browsers have different formats, which may lead to extra white space in the header information when you paste it into the code
I’m copying and pasting this piece of code when I add header information, is that okay?But if you look closely at the content-type part, isn’t there a lot of space?Just delete the Spaces and you’re done.
 
I modified

Crawl out of the data perfectly.
 
The first blog in my life, I hope you will pay more attention to me, I will continue to publish the blog about crawler in the future!!
 

Solution for Error Code: s1023 when installing DirectX SDK

Today when installing DXSDK_Jun10 (download address: http://download.microsoft.com/download/A/E/7/AE743F1F-632B-4809-87A9-AA1BB3458E31/DXSDK_Jun10.exe), the Error Code shown below mistakes: s1023.

Reason for error:
I also installed Microsoft Visual C++ 2010 Redistributable with the updated version on your computer. I also opened “programs and functions” in the control panel. Sure enough, there was “Microsoft Visual C++ 2010 x86 redistributable-1010.0.40219” and “Microsoft Visual C++ 2010 x64 redistributable-1010.0.40219” installed on the computer. DXSDK_Jun10 also shipped with “Microsoft Visual C++ 2010 x86 redistributable-1010.0.30319” and “Microsoft Visual C++ 2010 x64 redistributable-1010.0.30319”, which versions were lower than the installed versions of the machine, so s1023 error occurred in the installation.

Solutions:
Uninstall higher versions of “Microsoft Visual C++ 2010 x86 redistributable-1010.0.40219” and “Microsoft Visual C++ 2010 x64 redistributable-1010.0.40219”, and then reinstall DXSDK_Jun10.

Q:
Will it be affected to undistribute “Microsoft Visual C++ 2010 x86 redistributable-1010.0.40219” and “Microsoft Visual C++ 2010 x64 redistributable-1010.0.40219”?
A:
After DXSDK_Jun10 is installed, the above two components are still there, but the version is lower, so the impact is not significant.

If you really need “Microsoft Visual C++ 2010 x86 redistributable-1010.0.40219” and “Microsoft Visual C++ 2010 x64 redistributable-1010.0.40219”, you can install it after you finish installing DXSDK_Jun10. Download page address (https://www.microsoft.com/en-us/download/details.aspx?Id = 26999).

Original link; http://blog.csdn.net/ts1030746080/article/details/8681550