Amir-Mousavi's questions

on the Ubuntu 18.04 system I have cloned a project and to run it needs gradle but at running the gradle command gradle swiplRun I get the following error

Task :dockerRun FAILED docker: Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Post http://%2Fvar%2Frun%2Fdocker.sock/v1.39/containers/create?name=swiprolog: dial unix /var/run/docker.sock: connect: permission denied. See 'docker run --help'.

Task :dockerRunStatus FAILED Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Get http://%2Fvar%2Frun%2Fdocker.sock/v1.39/containers/swiprolog/json: dial unix /var/run/docker.sock: connect: permission denied

FAILURE: Build completed with 2 failures.

to solve I tried

$ sudo groupadd docker
$ sudo usermod -a -G docker myname  
"and once with"
$ sudo gpasswd -a myname docker

so I can run docker commands without sudo, but the same error also ./gradlew --stop and logout/login and reboot did not work too.

is it because of Docker or Gradle?

I have Dell Precision with windows 10 64bit installed on it. freeing some space and moving from RAID to AHCI I was able to install Ubuntu 18.04.

sometimes on startup or restart the dual boot screen GNU grub 2.02 goes black for a fraction of a second and returns and after that everything freezes. the arrow key does not work and countdown stops.

the only solution is ctrl + alt + del to restart and most of the times after this restart the problem does not occur.

the only accessories is a wireless Logitech mouse-keyboard connected to USB. is it a common problem? searching the web saw many grub problems but mostly were receiving an error screen.

Installing the yarn package manager from its instruction I did add its key and some weeks ago the key was expired. so I did the apt-key add again. but still on sudo apt update I get the warning:

W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: https://dl.yarnpkg.com/debian stable InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 4F77679369475BAA
W: Failed to fetch https://dl.yarnpkg.com/debian/dists/stable/InRelease  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 4F77679369475BAA
W: Some index files failed to download. They have been ignored, or old ones used instead.

sudo apt-key list shows that there are two keys where one is expired

    pub   rsa4096 2016-10-05 [SC]
      72EC F46A 56B4 AD39 **** **** **** **** **** ****
    uid           [ unknown] Yarn Packaging <[email protected]>
    sub   rsa4096 2016-10-05 [E]
    sub   rsa4096 2019-01-02 [S] [expires: 2020-02-02]

How can I remove only the expired one?

I have DELL Precision, with 512GB SSD. I did shrink the only Drive C, and made 125 GB of unallocated space to install Ubuntu on it.

restarting the system choosing boot, install Ubuntu, the installation process does not recognize any hard disk except the Flash memory that contains ubuntu bootable.

the information from Windows 10 side:

Dell Precision 3520
windows 10 pro
Intel Core i7-7820HQ
BIOS mode UEFI
from the device manager;
Storage Controllers:
        Intel chipset SATA/PCIe RST premium controller
        microsoft spaces storage controller
        microsoft VHD loopback controller
Disk 0: (Basic)
       SSDPEKK NVMe INTEL 512GB       
       Partition Style GPT
Rapid Storage Technology:
       Controller 1, Port 0
       Port Location Internal
       Type PCIe solid-state drive
       System Disk: yes
       Controller Type: NVMe
BIOS options on power up: 
       System Configuration/SATA Operation = RAID on (Intel RST)

I've read that the Ubuntu kernel is compatible with RST and should recognize the SSD, Also the Disk 0 is shown as basic which I think means hardware RAID. What should do in this case to have a dual boot installation of Ubuntu

I want to setup Android SDK on Ubuntu 18.04.1 LTS for React Native programming. according to the official Docs I have to define paths in .bash_profile. at first I was just putting the export commands i n terminal which seems it is not permanent and on each logout they disappear. but I defined them in .bashrc and I could see all via printenv | grep Android. now I moved them to .bash_profile so the file looks like

    # Android Paths    
    export ANDROID_HOME=$HOME/Android/Sdk
    export PATH=$PATH:$ANDROID_HOME/tools
    export PATH=$PATH:$ANDROID_HOME/tools/bin
    export PATH=$PATH:$ANDROID_HOME/platform-tools
    export PATH=$PATH:$ANDROID_HOME/emulator

but now on printenv I get

PWD=/home/user/Android/Sdk/tools
OLDPWD=/home/user/Android/Sdk

As I am new in Ubuntu I have got totally confused what and where is the correct place to identify the environment variables?

Following the react-native docs, I have installed Android 8.0 (Oreo) and have completed the rest of the instructions. The only difference is that I have defined the platform variables in .bashrc and not .bash_profile.

When I want to run my react-native application, I get the error message: Build failed with an exception.

Here are the relevant log messages:

sudo react-native run-android
Starting JS server...
Building and installing the app on the device (cd android && ./gradlew installDebug)...
Starting a Gradle Daemon, 1 incompatible and 1 stopped Daemons could not be reused, use --status for details

FAILURE: Build failed with an exception.

* What went wrong:
A problem occurred configuring project ':app'.
> SDK location not found. Define location with sdk.dir in the local.properties file or with an ANDROID_HOME environment variable.

The project built for me does not contain the local.properties file; but, I already have the variable ANDROID_HOME in my path as shown below:

$ printenv | grep Android
ANDROID_HOME=/home/amir/Android/Sdk
PATH=/home/amir/Android/Sdk/tools:/home/amir/Android/Sdk/tools/bin:/home/amir/Android/Sdk/platform-tools:/home/amir/Android/Sdk/emulator

I have created a .desktop file for Eclipse and put it in .local/share/applications in applications launcher the icon of app is not showing up.

[Desktop Entry]
Type=Application
Name=Oxygen_Eclipse
Comment=Eclipse Integrated Development Environment
Icon= /home/amir/IDE/OXYGEN/eclipse/icon.xpm 
Exec= /home/amir/IDE/OXYGEN/eclipse/eclipse 
Terminal=false
Categories=Development;IDE;Java;
StartupWMClass=Oxygen_Eclipse

I have the same .desktop file for eclipse Luna (with path to luna folder) and that one shows the icon. I have tried .png file and another .xmp icon none of them work.

on Ubuntu 16.04 I have installed AndroidStudio and via its AVD manager GUI did create tow new devices. now on Terminal when I type emulator -list-avds it lists the devices correctly, but when run emulator -avd <name> I face errors:

[139684796983104]:ERROR:android/android-emu/android/qt/qt_setup.cpp:28:Qt library not found at ../emulator/lib64/qt/lib
Could not launch '/home/amir/../emulator/qemu/linux-x86_64/qemu-system-i386': No such file or directory

How should I solve it?

on a newly installed Ubuntu 16.04, I was receiving Ubuntu 16.04 has experienced an internal error. there is a bug issue reported about OpenJDK with this error, therefore I completely removed Java and manually installed Oracle packages in JVM folder. yet I receive the same error.

I have a very poor signal with unstable connection on my BCM43142 wireless adapter. when I installed ubuntu for first time I had bcmwl-kernel-source driver by default installed and I chose it in software&update window which gives poor signal and low speed. I also was able to install wireless-bcm43421-oneiric-dkms by a .deb file but not uninstall the previous one and that is still in the list of additional drivers, I did unselect that and chose wireless-bcm43421-oneiric-dkms after reboot there is no WiFi option to enable. now I decided to install broadcom-sta-6.30. in the requirements README file of the package it says; On Ubuntu, you will need headers and tools. Try these commands:

# sudo apt-get install build-essential linux-headers-generic
# sudo apt-get build-dep linux

but on build-dep Is receive :

Reading package lists... Done
E: Unable to find a source package for linux

also after that the Build instruction is complicated to me as I am new to Linux and Ubuntu what should I do with the Error first, has anyone had the same problem as me with the WiFi adapter ? what is the best driver for BCM43142 [14e4:4365]