Category Archives: How to Fix

Determining IP information for eth0… failed; no link present. Check cable?

recently, there are too many things in my life, I have been wanting to learn Linux operating system well, but I have no time.

last night, ready to configure the FTP server, the results found that the virtual machine and the local network connection is not connected, baidu online once, the problem was quickly solved, so will solve the problem to share out.

1, use ifconfig command to check the RedHat network device (network interface card), found that eth0 network card did not start.

2. So I use the ifup eth0 command to enable the network interface eth0, and I realize that I cannot start today. failed; no link present. Check cable?”

solution:

1. The connection mode between the virtual machine and the machine is: host-only mode. I will not introduce the differences between several connection modes. If the previous connection was not host-only, the virtual machine will need to be restarted after the change.

2. Start the two virtual network CARDS of the machine.

3. Add the following script in /etc/sysconfig/network-scripts/ifcfg-eth0:
check_link_down() {
return 1;
}

specific operation is as follows:

enter the following command:

[root@localhost root]# cd /etc/sysconfig/network-scripts/
[root@localhost network-scripts]# vi ifcfg-eth0

return 1;
check_link_down() {
return 1;
check_link_down() {
return 1;
check_link_down() {
return 1;
}

Next, restart the network (if it doesn’t work, restart the system!).
[root@localhost network-scripts]# ifup eth0
Determining IP information for eth0… done.

ok, see the above prompt indicates that it has been successful, you can check if you have got a valid IP by ifconfig.

Finally, check on the machine to see if you can PING the Linux operating system in the virtual machine

This entry was posted in How to Fix and tagged Determining, eth0, Failed, information, ip, linux on 2020-10-25 by Robins.

Install Python package under MacOS: “error: Command ‘GCC’ failed with exit status 1”

“error: command ‘GCC’ failed with exit status 1”,
when installing psutil package today

looked up a lot of methods did not resolve, the final is to execute the following command to resolve:

$ xcode-select --install

specific error as follows:

➜ ~ pip install psutil Collecting psutil Using cached https://files.pythonhosted.org/packages/1c/ca/5b8c1fe032a458c2c4bcbe509d1401dca9dda35c7fc46b36bb81c2834740/psutil-5.6.3.tar.gz Building wheels for collected packages: psutil Building wheel for psutil (setup.py) ... error ERROR: Complete output from command /Library/Frameworks/Python.framework/Versions/3.7/bin/python3.7 -u -c 'import setuptools, tokenize;__file__='"'"'/private/var/folders/lc/19sy67z94fddlb57t50zd7_c0000gn/T/pip-install-72tjomie/psutil/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' bdist_wheel -d /private/var/folders/lc/19sy67z94fddlb57t50zd7_c0000gn/T/pip-wheel-w8plfncs --python-tag cp37: ERROR: running bdist_wheel running build running build_py creating build creating build/lib.macosx-10.9-x86_64-3.7 creating build/lib.macosx-10.9-x86_64-3.7/psutil copying psutil/_pswindows.py -> build/lib.macosx-10.9-x86_64-3.7/psutil copying psutil/_common.py -> build/lib.macosx-10.9-x86_64-3.7/psutil copying psutil/__init__.py -> build/lib.macosx-10.9-x86_64-3.7/psutil copying psutil/_psosx.py -> build/lib.macosx-10.9-x86_64-3.7/psutil copying psutil/_psbsd.py -> build/lib.macosx-10.9-x86_64-3.7/psutil copying psutil/_psaix.py -> build/lib.macosx-10.9-x86_64-3.7/psutil copying psutil/_pslinux.py -> build/lib.macosx-10.9-x86_64-3.7/psutil copying psutil/_compat.py -> build/lib.macosx-10.9-x86_64-3.7/psutil copying psutil/_psposix.py -> build/lib.macosx-10.9-x86_64-3.7/psutil copying psutil/_pssunos.py -> build/lib.macosx-10.9-x86_64-3.7/psutil creating build/lib.macosx-10.9-x86_64-3.7/psutil/tests copying psutil/tests/test_contracts.py -> build/lib.macosx-10.9-x86_64-3.7/psutil/tests copying psutil/tests/test_connections.py -> build/lib.macosx-10.9-x86_64-3.7/psutil/tests copying psutil/tests/runner.py -> build/lib.macosx-10.9-x86_64-3.7/psutil/tests copying psutil/tests/test_unicode.py -> build/lib.macosx-10.9-x86_64-3.7/psutil/tests copying psutil/tests/test_misc.py -> build/lib.macosx-10.9-x86_64-3.7/psutil/tests copying psutil/tests/test_posix.py -> build/lib.macosx-10.9-x86_64-3.7/psutil/tests copying psutil/tests/test_linux.py -> build/lib.macosx-10.9-x86_64-3.7/psutil/tests copying psutil/tests/test_sunos.py -> build/lib.macosx-10.9-x86_64-3.7/psutil/tests copying psutil/tests/__init__.py -> build/lib.macosx-10.9-x86_64-3.7/psutil/tests copying psutil/tests/test_aix.py -> build/lib.macosx-10.9-x86_64-3.7/psutil/tests copying psutil/tests/test_process.py -> build/lib.macosx-10.9-x86_64-3.7/psutil/tests copying psutil/tests/test_bsd.py -> build/lib.macosx-10.9-x86_64-3.7/psutil/tests copying psutil/tests/test_system.py -> build/lib.macosx-10.9-x86_64-3.7/psutil/tests copying psutil/tests/test_osx.py -> build/lib.macosx-10.9-x86_64-3.7/psutil/tests copying psutil/tests/test_memory_leaks.py -> build/lib.macosx-10.9-x86_64-3.7/psutil/tests copying psutil/tests/test_windows.py -> build/lib.macosx-10.9-x86_64-3.7/psutil/tests copying psutil/tests/__main__.py -> build/lib.macosx-10.9-x86_64-3.7/psutil/tests running build_ext building 'psutil._psutil_osx' extension creating build/temp.macosx-10.9-x86_64-3.7 creating build/temp.macosx-10.9-x86_64-3.7/psutil creating build/temp.macosx-10.9-x86_64-3.7/psutil/arch creating build/temp.macosx-10.9-x86_64-3.7/psutil/arch/osx gcc -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -arch x86_64 -g -DPSUTIL_POSIX=1 -DPSUTIL_VERSION=563 -DPSUTIL_OSX=1 -I/Library/Frameworks/Python.framework/Versions/3.7/include/python3.7m -c psutil/_psutil_common.c -o build/temp.macosx-10.9-x86_64-3.7/psutil/_psutil_common.o xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun error: command 'gcc' failed with exit status 1 ---------------------------------------- ERROR: Failed building wheel for psutil Running setup.py clean for psutil Failed to build psutil Installing collected packages: psutil Running setup.py install for psutil ... error ERROR: Complete output from command /Library/Frameworks/Python.framework/Versions/3.7/bin/python3.7 -u -c 'import setuptools, tokenize;__file__='"'"'/private/var/folders/lc/19sy67z94fddlb57t50zd7_c0000gn/T/pip-install-72tjomie/psutil/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record /private/var/folders/lc/19sy67z94fddlb57t50zd7_c0000gn/T/pip-record-wr1nt_db/install-record.txt --single-version-externally-managed --compile: ERROR: running install running build running build_py creating build creating build/lib.macosx-10.9-x86_64-3.7 creating build/lib.macosx-10.9-x86_64-3.7/psutil copying psutil/_pswindows.py -> build/lib.macosx-10.9-x86_64-3.7/psutil copying psutil/_common.py -> build/lib.macosx-10.9-x86_64-3.7/psutil copying psutil/__init__.py -> build/lib.macosx-10.9-x86_64-3.7/psutil copying psutil/_psosx.py -> build/lib.macosx-10.9-x86_64-3.7/psutil copying psutil/_psbsd.py -> build/lib.macosx-10.9-x86_64-3.7/psutil copying psutil/_psaix.py -> build/lib.macosx-10.9-x86_64-3.7/psutil copying psutil/_pslinux.py -> build/lib.macosx-10.9-x86_64-3.7/psutil copying psutil/_compat.py -> build/lib.macosx-10.9-x86_64-3.7/psutil copying psutil/_psposix.py -> build/lib.macosx-10.9-x86_64-3.7/psutil copying psutil/_pssunos.py -> build/lib.macosx-10.9-x86_64-3.7/psutil creating build/lib.macosx-10.9-x86_64-3.7/psutil/tests copying psutil/tests/test_contracts.py -> build/lib.macosx-10.9-x86_64-3.7/psutil/tests copying psutil/tests/test_connections.py -> build/lib.macosx-10.9-x86_64-3.7/psutil/tests copying psutil/tests/runner.py -> build/lib.macosx-10.9-x86_64-3.7/psutil/tests copying psutil/tests/test_unicode.py -> build/lib.macosx-10.9-x86_64-3.7/psutil/tests copying psutil/tests/test_misc.py -> build/lib.macosx-10.9-x86_64-3.7/psutil/tests copying psutil/tests/test_posix.py -> build/lib.macosx-10.9-x86_64-3.7/psutil/tests copying psutil/tests/test_linux.py -> build/lib.macosx-10.9-x86_64-3.7/psutil/tests copying psutil/tests/test_sunos.py -> build/lib.macosx-10.9-x86_64-3.7/psutil/tests copying psutil/tests/__init__.py -> build/lib.macosx-10.9-x86_64-3.7/psutil/tests copying psutil/tests/test_aix.py -> build/lib.macosx-10.9-x86_64-3.7/psutil/tests copying psutil/tests/test_process.py -> build/lib.macosx-10.9-x86_64-3.7/psutil/tests copying psutil/tests/test_bsd.py -> build/lib.macosx-10.9-x86_64-3.7/psutil/tests copying psutil/tests/test_system.py -> build/lib.macosx-10.9-x86_64-3.7/psutil/tests copying psutil/tests/test_osx.py -> build/lib.macosx-10.9-x86_64-3.7/psutil/tests copying psutil/tests/test_memory_leaks.py -> build/lib.macosx-10.9-x86_64-3.7/psutil/tests copying psutil/tests/test_windows.py -> build/lib.macosx-10.9-x86_64-3.7/psutil/tests copying psutil/tests/__main__.py -> build/lib.macosx-10.9-x86_64-3.7/psutil/tests running build_ext building 'psutil._psutil_osx' extension creating build/temp.macosx-10.9-x86_64-3.7 creating build/temp.macosx-10.9-x86_64-3.7/psutil creating build/temp.macosx-10.9-x86_64-3.7/psutil/arch creating build/temp.macosx-10.9-x86_64-3.7/psutil/arch/osx gcc -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -arch x86_64 -g -DPSUTIL_POSIX=1 -DPSUTIL_VERSION=563 -DPSUTIL_OSX=1 -I/Library/Frameworks/Python.framework/Versions/3.7/include/python3.7m -c psutil/_psutil_common.c -o build/temp.macosx-10.9-x86_64-3.7/psutil/_psutil_common.o xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun error: command 'gcc' failed with exit status 1 ---------------------------------------- ERROR: Command "/Library/Frameworks/Python.framework/Versions/3.7/bin/python3.7 -u -c 'import setuptools, tokenize;__file__='"'"'/private/var/folders/lc/19sy67z94fddlb57t50zd7_c0000gn/T/pip-install-72tjomie/psutil/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record /private/var/folders/lc/19sy67z94fddlb57t50zd7_c0000gn/T/pip-record-wr1nt_db/install-record.txt --single-version-externally-managed --compile" failed with error code 1 in /private/var/folders/lc/19sy67z94fddlb57t50zd7_c0000gn/T/pip-install-72tjomie/psutil/

This entry was posted in How to Fix and tagged ProgrammerAH on 2020-10-25 by Robins.

Attempt to reset the display driver and recover from timeout failed

a few days ago, my asus computer K42J played a war after 1942 normal shutdown, and then the next day after boot, found that the blue screen, and a little flower screen, forced shutdown, boot, again can not display, hard disk lamp, lamp power supply is normal, no boot logo, then look at the effect of the external monitor, found an external monitor can display properly asus logo, then start, after the blue screen, interface is as follows:

Attempt to reset the display driver and recover from timeout failed

atikmpag.sys

.

Then enter the safe mode, change the video card driver to VGA driver, can normally enter the system, the external display is normal, the built-in display is still no reaction, the driver changed to amd driver or blue screen, can’t enter the system.

suspected that the screen wiring was broken, so we took apart the wiring, and found that the wiring was normal.

to get the maintenance point, the master said the video card virtual welding…

so redo the video card, the problem is solved. Good is not the screen is broken, otherwise this book is useless ~~~~~ write down here, hope to meet the same problem friends can find some ideas.

Execution failed for task ‘:app:processDebugGoogleServices’. > No matching client found for package

错误信息:

……

FAILURE:构建失败，出现异常

*哪里出错了:
任务’:app:processDebugGoogleServices’执行失败。
比;没有找到与包名’io.ionic.starter’匹配的客户端

* Try:
运行与—stacktrace选项，以获得堆栈跟踪。使用——info或——debug选项运行以获得更多日志输出

*在https://help.gradle.org获得更多帮助

在4s中构建失败
:app:processDebugGoogleServices
解析json文件:D:项目\眼线\眼线\app\平台\android\app\google-servicesjson
:app:processDebugGoogleServices FAILED
26 actionable tasks: 2已执行，24最新
cmd:命令失败，退出代码1错误输出:
FAILURE: Build FAILED with an exception.

*哪里出错了:
任务’:app:processDebugGoogleServices’执行失败。
比;没有找到与包名’io.ionic.starter’匹配的客户端

* Try:
运行与—stacktrace选项，以获得堆栈跟踪。使用——info或——debug选项运行以获得更多日志输出

*在https://help.gradle.org获得更多帮助

构建失败
[ERROR]运行子进程cordova时出现错误

使用——verbose标志重新运行此命令可以提供更多信息

解决办法:

将文件app \ config . xml中的id =“io.ionic.starter”和app \谷歌服务。json中的“package_name”:“io.ionic.starter”路径修改为一样的。

参考:
https://stackoverflow.com/questions/34679411/android-studio-gradle-errorexecution-failed-for-task-appprocessdebuggoogles

Failed to find target with hash string ‘android-25’ in:D:\SDK

error message

Failed to find target with hash string 'android-25' in:D:\SDK
Install missing platform(s) and sync project

watermark is so annoying!

没有找到与哈希字符串“android-25”匹配的目标在D：\ SDK。
安装丢失的平台并同步项目

appears in the scenario

got a nice project and opened it up locally. The above error occurred after compilation.

solution

problem error means: no information for Android API 25 was found in the SDK. Here’s why: You need Android API 25 in your project, but you haven’t downloaded it locally.

method 1
go to SDK Manager to download the corresponding API, and then re-compile it. In the new Version of Android Studio, click Ok or Apply below to confirm the download after selecting the corresponding API.

The pom file

gradle could not get

Could not GET 'https://dl.google.com/dl/android/maven2/com/android/tools/build/gradle/3.1.4/gradle-3.1.4.pom'. Received status code 405 from server: Method Not Allowed
Enable Gradle 'offline mode' and sync project

configure maven address for domestic :

allprojects {
    repositories {
        google()
        jcenter()
        maven { url 'http://maven.aliyun.com/nexus/content/groups/public/' }
    }
}

Android studio gradle cannot get the pom file

iOS Xcode：Failed to create provisioning profile.

compile error:

Failed to create provisioning profile. The app ID “com.aaa.bbb.demo” cannot be registered to your development team. Change your bundle identifier to a unique string to try again.

fix: open Build Settings, search for “bundle”, change the Product bundle Identifier option, change it to an unused package name, problem solved.

error: RPC failed; curl 56 OpenSSL SSL_ read: SSL_ ERROR_ Syscall, errno 10054 solution

is not guaranteed to solve the problem. Search multiple blogs to try to find a solution. Finally clone succeeded. (PS: don’t guarantee success)
http://www.wangxianfeng.cn/wordpress/2018/07/14/git use the common errors in the process of solving/

https://www.cnblogs.com/emmetyang/p/10620819.html attempts to download ffmpeg source problem: (PS: what is the difference between the snapshot version and the version, welcome to the great god taught)

$ git clone https://git.ffmpeg.org/ffmpeg.git ffmpeg
Cloning into 'ffmpeg'...
remote: Counting objects: 570040, done.
remote: Compressing objects: 100% (118805/118805), done.
error: RPC failed; curl 56 OpenSSL SSL_read: SSL_ERROR_SYSCALL, errno 10054
fatal: the remote end hung up unexpectedly
fatal: early EOF
fatal: index-pack failed

first is the problem may be upload size limit, execute the following command:

git config http.postBuffer 524288000

clone again may still error, then you can try

git config http.sslVerify "false"

but then it’s

fatal: not in a git directory

according to the second blog post, use the following command

git config  --global   http.sslVerify "false"

// note that the original blog command was written incorrectly. It should be – global

and then

git clone https://git.ffmpeg.org/ffmpeg.git ffmpeg

just wait.

Alicloud centos8 reports an error “error: failed to synchronize cache for repo ‘EPEL modular'”

ali cloud has been online centos8 system, the 8 series is relatively new, ali cloud bug is still there, use yum unexpectedly can not, the system default did not install git, want to install yum install git directly Error “Error: Failed to synchronize cache for repo ‘epel-modular'”, extend source Error, baidu has no solution, it can only solve by itself!

the solution is simple:

scheme 1: directly delete /etc/yum.repos. D (first backup)

directory epel beginning file

would be yum.

scheme 2:

yum succeeded but the prompt program does not exist and cannot install

do not delete /etc/yum.repos. D inside the file

edit

vi /etc/resolv.conf

and

nameserver 114.114.114.114

save

and then execute yum successfully

ali cloud recently launched centos8 can’t yum, DNS can’t resolve the extended library domain name. Hey, their family is a little careless about their operation and maintenance

Convergence warning: lbfgs failed to converge (status=1): Stop: total no. of iterations reached L

How to Solve Convergence Warning: LBFGS failed to converge (status=1): STOP: TOTAL NO. ITERATIONS REACHED LIMIT. Increase the number of ITERATIONS (max_iter) or scale the data as shown in:

solve the problem

F:\Program Files\Python\Python36\lib\site-packages\sklearn\linear_model\_logistic.py:764: ConvergenceWarning: lbfgs failed to converge (status=1):
STOP: TOTAL NO. of ITERATIONS REACHED LIMIT.
Increase the number of iterations (max_iter) or scale the data as shown in:
https://scikit-learn.org/stable/modules/preprocessing.html
Please also refer to the documentation for alternative solver options:
https://scikit-learn.org/stable/modules/linear_model.html#logistic-regression
extra_warning_msg=_LOGISTIC_SOLVER_CONVERGENCE_MSG)

Solution Ideas

convergence warning: LBFGS cannot aggregate (state =1) :
stop: the total number of iterations is limited.
to increase the number of iterations (maximum) or scaling of data, as shown in https://scikit-learn.org/stable/modules/preprocessing.html
please refer to the documentation for other solver options: https://scikit-learn.org/stable/modules/linear_model.html#logistic-regression%20%C2%A0%20extra_warning_msg=_LOGISTIC_SOLVER_CONVERGENCE_MSG)

solution

The total number of iterations reached the limit. Increase the number of iterations (maximum) or scale the data. Matching and convergence warnings caused by the Scikit-learn version issue have been changed in the functions and methods called and will not affect the operation of the program.
recommended to upgrade the version or modify to the latest version of the usage, use the library functions properly!

Get synchronization retrieved hash chain is invalid error

error message:

########## BAD BLOCK #########
Chain config: {ChainID: 1 Homestead: 1150000 DAO: 1920000 DAOSupport: true EIP150: 2463000 EIP155: 2675000 EIP158: 2675000 Byzantium: 4370000 Constantinople: 7280000 Petersburg: 7280000 Istanbul: 9069000, Muir Glacier: 9200000, Engine: ethash}

Number: 9069000
Hash: 0x072cf1df374159c5f23087750d8a2f3201542da196939ce446ff2c5c390fe5f6
·································································
·································································
·································································
·································································
·································································
Error: invalid gas used (remote: 6395997 local: 6449093)
##############################
 
WARN [12-10|12:01:11.813] Synchronisation failed, dropping peer    peer=106a4c4cba9167bf err="retrieved hash chain is invalid"

environment

Geth
Version: 1.9.7
Architecture: amd64
Protocol Versions: [64 63]
Go Version: go1.13.1
Operating System: Linux

cause:

ethereum update 2.0, starting with block 9069000, found on github that this error

occurs with version 1.9.8 1.9.7

scheme:

updates geth to version 1.9.9. The following provides an update method

centos7 environment

select the latest version to download geth download address

wget -c https://github.com/ethereum/go-ethereum/archive/v1.9.9.zip

download good, unzip (no unzip download a unzip)

unzip v1.9.9.zip

then enter the directory, make geth

cd go-ethereum-1.9.9 
make geth

if make geth for a long time no response, probably is the problem of the network, add a proxy, command line input:

export GOPROXY=https://goproxy.cn

and then re-make geth is ok.
after loading, check the version of geth. If it is still the original version, delete the original geth command

export PATH=$PATH:~/go-ethereum-1.9.9/build/bin/
$PATH:

for your geth command
```
vim  /etc/profile
```
1. and then refresh
```
source /etc/profile
```
check the next version should be ok

and then back on track, pull block

session_ start(): open(SESSION_ FILE, O_ Rdwr)) failed: processing of permission denied (13)

phpMyAdmin — Error
Error during session start; please check your PHP and/or webserver log file and configure your PHP installation properly. Also ensure that cookies are enabled in your browser.

session_start(): open(SESSION_FILE, O_RDWR)) failed: Permission denied (13)

a lot of friends have had this problem with phpmyadmin, so how do you solve it?

problem

usually occurs in this case, which is a problem of session.save_path assignment. The location of session can be empty, or the target address may not exist, or it may be a permission problem, we need to check one by one.

solution

check PHP. The session in the ini. Save_path assignment, Linux system generally located in the/etc/PHP ini, if the assignment is empty, and then to check the/etc/HTTPD/conf. D/PHP. The conf file session. Save_path assignment, if the same is empty, you need to specify an existing path.
if either of the above two parameters has an assignment, you need to check whether the directory specified by the assignment exists, if not, you need to create a directory.
if the specified directory exists, then check the directory permissions, direct 777 is the most convenient.

thought flow

Top cloud blog, database, cloud speed, virtual host, domain name registration, domain name, cloud server, cloud host, cloud building site,ysidc.top

Solving environment: failed with initial frozen solve. Retrying with flexible solve.错误

error
error: PackagesNotFoundError: The following packages are not available from current channels:

https://blog.csdn.net/The_Time_Runner/article/details/99848728, although not completely solve the problem, but you can use for a moment. But installing the version directly with PIP is problematic. I don’t have to do

as much as possible

The following packages are not available from current channels.

https://blog.csdn.net/Erice_s/article/details/80156191 appear above Solving environment: failed with initial frozen solve. Retrying with flexible solve. This error is due to the lack of a channel, which can then be used correctly.

error message

appears in the scenario

solution

solve the problem

Solution Ideas

solution

error message:

environment Geth Version: 1.9.7 Architecture: amd64 Protocol Versions: [64 63] Go Version: go1.13.1 Operating System: Linux

cause:

scheme:

problem

solution

thought flow

environment

Geth
Version: 1.9.7
Architecture: amd64
Protocol Versions: [64 63]
Go Version: go1.13.1
Operating System: Linux