installation – Why this app is not installed but installed on my phone

I have an app whose link I can't find on Google Play or other websites. That's why I passed this backup file from zapya on to my friends, who are using this link.

I like the app like this:

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So I asked why this app is not installed on my Android phone while my Android version is now updated by this way:

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And I think your Android version needs to be close to the last version too?

Thank you for your attention.

Windows 10 – What happens if I choose "Install Ubuntu next to Windows 10" during the Ubuntu installation without making any changes to the partitions in Windows 10 Home?

I searched for Dual Boot Windows 10 Home and Ubuntu 18.04 LTS on the Internet. Most installation guides indicated that the first step was to free up space on hard drive partitions, make USB bootable, and then choose "Install Ubuntu next to Windows 10" when installing Ubuntu.
Does Ubuntu automatically select the free space created with Disk Management during installation?
What happens if I don't have free space and continue with the bootable USB, boot USB and choose "Install Ubuntu next to Windows 10"? will it work ?

spfx – Installation of the Yeoman generator fails with node 10.18.1

Tonight I thought I would update my SPFx Dev Toolchain:

Install the latest 10.xx LTS nodes (with NVM as recommended by AC or David Warner). Better Node.js Install administration with Node Version Manager

nvm install 10.18.1
nvm use 10.18.1
npm install gulp-cli-g 

Next I try to update Yoeman and gulp

npm install -g yo gulp

npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.11 (node ​​modules gulp node modules fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.11: wanted {"os": "darwin", "arch
":" any "} (current: {" os ":" win32 "," arch ":" x64 "})

npm ERR! Code EEXIST
npm ERR! Path C: Program Files nodejs node_modules gulp bin gulp.js
npm ERR! Destination C: Program Files nodejs gulp
npm ERR! EEXIST: file already exists, cmd shim & # 39; C: Program nodejs node_modules gulp bin gulp.js & # 39; -> & # 39; C: Progr
bin Files nodejs gulp & # 39;
npm ERR! The file exists: C: Program Files nodejs gulp
npm ERR! Remove the existing file and try again, or run npm
npm ERR! With –force, you can ruthlessly overwrite files.

npm ERR! A full log of this run can be found in:
npm ERR! C: Users danie AppData Roaming npm-cache_logs 2020-01-12T20_54_30_643Z-debug.log

Note that this problem does not occur with node 10.16.3. Has anyone found a workaround?

Open source – indicators that prevent the installation and operation of web server applications

Most applications are designed for X86 architectures. BBB server requests do not specify an X86 request. The release of the 4 GB Raspberry Pi4 opens up new opportunities for hosting Linux source web applications such as Big Blue Button: & # 39; BBB & # 39 ;.

It would be nice to understand and recognize the indicators so as not to waste time on impossible projects. Not only for BBB, but also for other open source Linux projects that appear to be candidates for ARM platforms.

Indicators (defined for this discussion) are signs of obstacles (possibly in the installation commands) that Prevent installation and operation the web application.

installation – does the signature verification by adb install do apk work?

When using adb install something.apk, does the android package manager check the apk's signature? adb install Nothing appears on the phone screen, so it is difficult for me to know if this is the case.

I like the idea of ​​using apk mirror websites to download apk files with a phone that doesn't offer google play services. However, since I can't trust any of these Apk Spiegel websites, I want to make sure that the app's data is not up to date. Risk of use adb install when upgrading to a new apk version.

If adb install Does the signature check what happens if the signature does not match? If the installation fails, a question is displayed on the phone screen or is the existing data of the app deleted automatically?

How does the answer to my question change when I use it? -r Option with adb install?

When i use adb uninstall -k Before installing the app upgrade, is there a signature check from the previous installation before the old app data is released for the new installation?

Bonus: We have the option adb install -l, Where -l stands for "forward-lock the app". What does this "forwarding block" mean and does it have anything to do with signature verification and access to app data?

Installation – how do i build bitcoin in fedora 18?

So I compiled Bitcoind from the Github source on Fedora 18.

sudo yum install gcc-c++ make
sudo yum install boost-devel 
sudo yum install db4-devel
sudo yum install openssl-devel
sudo yum install rpm-build
sudo yum install lynx
sudo yum install python-devel
sudo yum install miniupnpc
sudo yum install miniupnpc-devel.i686
sudo yum install libdb-cxx.i686
sudo yum install libdb-cxx-devel.i686

Get the latest tarball now from:
Save and unzip it to a directory, say ~ / installs / openssl_ecdsa

cd ~/installs/openssl_ecdsa
sudo make install

Now pull the latest Bitcoin source from Github

cd ~
git clone

If you want the latest stable version,
You can find the version number here:

git checkout 0.8.3 //latest stable at the moment
cd bitcoin/src
export OPENSSL_INCLUDE_PATH="/usr/local/ssl/include"
export OPENSSL_LIB_PATH="/usr/local/ssl/lib"
make -f makefile.unix

mac os – What is the installation path of AdoptOpenJDK 8.232 in appVeyor in the macos image?

I'm trying to change the default JDK included in Appveyor from 13 to 8 in your MacOS image, which according to your documentation is already preinstalled.

This is what i tried before

export JAVA_HOME=`/Library/Java/JavaVirtualMachines/jdk1.8.0_232`

/usr/local/Cellar/appveyor-build-agent/7.0.2546/ Line 62: /Library/Java/JavaVirtualMachines/jdk1.8.0_232: No such file or directory

export JAVA_HOME=`/usr/libexec/java_home -v 8 --exec javac -version`

No JVMs could be found that correspond to version "8".

Networking – How can two machines with identical Ubuntu versions display different installation candidates for one package (Network Manager)?

I get two different responses to the command on these two computers, which are based on the same Lubuntu version but have different installation and uninstallation protocols.
sudo apt-get install --dry-run network-manager
One issue:
network-manager is already the newest version (1.10.6.-2ubuntu1.2)
The other outputs:
network-manager is already the newest version (1.10.14.-0ubuntu2)
The output for the next commands is identical:
lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 18.04.3 LTS
Release: 18.04
Codename: bionic
uname -a
Linux (machine-name) #84-Ubuntu SMP Thu Dec 19 08:06:00 UTC 2019 i686 i686 i686 GNU/Linux

How can you get another candidate? Is this based on the currently installed packages and can the dependencies be displayed?

System installation – Back up Ubuntu for beginners and create and install the file

I only use Ubuntu 19.10. Here is the list of things I've already done to back up Ubuntu
Install clamtk
Install gufw
Encrypt the partition to prevent hard drive loss
Configure VPN (Proton VPN)
Restrict software (only install necessary software)
What can I do to make Ubuntu more secure? I think that's helpful. In addition, my Ubuntu starts very slowly, more than 2 minutes on the hard drive. Is the hard drive a problem?
Also, how can I create the Ubuntu Intsall file using my own software and remove the unnecessary software and file
Thank you very much