Issues running a virtual machine

Went to do an initial boot for a virtual machine I had setup and received the following error

Kernel driver not installed (rc=-1908)  The VirtualBox Linux kernel driver is either not loaded or not set up correctly. Please try setting it up again by executing  '/sbin/vboxconfig' 

so I ran “sudo /sbin/vboxconfig” and received the following

vboxdrv.sh: Stopping VirtualBox services. vboxdrv.sh: Starting VirtualBox services. vboxdrv.sh: Building VirtualBox kernel modules. vboxdrv.sh: failed: modprobe vboxdrv failed. Please use 'dmesg' to find out why.  There were problems setting up VirtualBox.  To re-start the set-up process, run   /sbin/vboxconfig as root.  If your system is using EFI Secure Boot you may need to sign the kernel modules (vboxdrv, vboxnetflt, vboxnetadp, vboxpci) before you can load them. Please see your Linux system's documentation for more information. 

Being a Linux noob I’m not sure what to do from here.

Heartbeat node that was kicked out doesn’t rejoin virtual IP service

We have a 2-node heartbeat cluster that servers a virtual IP. Previous due to an error, the network interface for node1 died and resulted in the cluster kicking node1 from the virtual IP party.

Now that we have fixed it, node1 no longer gets to rejoin the virtual IP party. Setting node2 to standby does not trigger failover to node1.

I am unfamiliar with heartbeat. Is there a configuration/command anywhere that allows me to reverse/configure/un-blacklist this?

How do I run virtual machines in Parallels Lite on Mojave?

I downloaded Parallels Lite from the App Store. Even though Parallels Lite claims to be free if you want to run Linux virtual machines, the only thing I see is this:

enter image description here

This is what the help says:

Choose How to Use Parallels Desktop Lite

When you launch Parallels Desktop Lite for the first time, you need to choose how you’re going to use it. Choose one of the following:

  • Windows & Support. If you choose this option, you will be able to create and run virtual machines with Windows, Linux and any other supported operating system. You will also be able to contact the support team for assistance.

    Note: This option is free during a trial period. If you want to continue using Windows or other virtual machines after the trial period expires, you need to purchase a subscription.

  • Linux only. If you choose this option, you will be able to create and run only Linux virtual machines. This option is completely free of charge. However, telephone support is not available.

Important! Please note that Windows and its license are not included.

Transcribed from this screenshot provided by OP.

but I never saw the window described in the help page. Instead, it took me straight to subscription.

What am I doing wrong? Why am I unable to add a virtual machine?

node.js app on ubuntu linux with postgresql on virtual box on windows client

I set up, ubuntu linux on virtual box. Then I installed postgresql and node.js So basically I made a clean installation and i want that ubuntu handles my requests. When i run node server.js , a Sequelize.js error occurred.

Unhandled rejection SequelizeConnetionRefusedError: connect ECONNREFUSED 127.0.0.1:5433

PostgreSQL is listening on port 5432, and once i run node server.js,tables are created with no problem.

I think is a problem with my client, and I don’t know why.

postgres.conf listen_addresses=’*’.

pg_hba.conf host all all 0.0.0.0/0 trust.

I have little bit experience with Linux Ubuntu and configuration So a big hug and thanks for who will help me

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How to test Java code in the android studio without using virtual devices or connected devices?

      I'm an amateur user of android studio. Please let me know how to test Java code [MainActivity.java] in the android studio without using virtual devices or connected devices. I'm aware about the F2 option available on Android studio, which highlights the error messages in the program.        Is there a way I can test the program just like the changes done to the build.grade files asks for a project sync which is necessary? For example using Bluetooth or wireless to connect to mobile devices.       If you think it is out of the topic kindly comment and I shall delete. 

Make Virtual Machine visible in Host net [on hold]

I have several VMs under Debian 6.0.7 on my Toshiba Notebook under ArchLinux. I use QEMU with bridge helper:

qemu-system-x86_64 \ ... -netdev tap,helper=/usr/lib/qemu/qemu-bridge-helper,br=qemu_br1,id=network0,vhost=on \ ... 

QEMU creates tap interface for every VM when it starts. I configure bridge packet forwarding so my VMs sees each other in 192.168.4.0 subnet and have Internet access via Host wlp5s0 wifi interface:

# Create bridge and assign its IP addresses ip link add name qemu_br1 type bridge ip link set qemu_br1 up ip addr add 192.168.4.1/24 dev qemu_br1  # Enable packet forwarding sysctl net.ipv4.conf.wlp5s0.forwarding=1 sysctl net.ipv4.conf.qemu_br1.forwarding=1  # Use iptables to enable NAT iptables -t nat -A POSTROUTING -o wlp5s0 -j MASQUERADE iptables -A FORWARD -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT iptables -A FORWARD -i qemu_br1 -o wlp5s0 -j ACCEPT 

Output of ip a on Host:

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000     link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00     inet 127.0.0.1/8 scope host lo        valid_lft forever preferred_lft forever     inet6 ::1/128 scope host        valid_lft forever preferred_lft forever 2: enp4s0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000     link/ether 00:1e:33:b1:80:a3 brd ff:ff:ff:ff:ff:ff 3: wlp5s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000     link/ether 00:24:d2:55:2e:e4 brd ff:ff:ff:ff:ff:ff     inet 192.168.43.79/24 brd 192.168.43.255 scope global noprefixroute wlp5s0        valid_lft forever preferred_lft forever     inet6 fe80::4339:7cfe:56dd:2c2e/64 scope link        valid_lft forever preferred_lft forever 4: qemu_br1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000     link/ether ea:a4:79:9c:6a:eb brd ff:ff:ff:ff:ff:ff     inet 192.168.4.1/24 scope global qemu_br1        valid_lft forever preferred_lft forever     inet6 fe80::e8a4:79ff:fe9c:6aeb/64 scope link        valid_lft forever preferred_lft forever 12: tap0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel master qemu_br1 state UNKNOWN group default qlen 1000     link/ether fe:40:42:b3:38:e7 brd ff:ff:ff:ff:ff:ff     inet6 fe80::fc40:42ff:feb3:38e7/64 scope link        valid_lft forever preferred_lft forever 

And on one of VMs:

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN      link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00     inet 127.0.0.1/8 scope host lo     inet6 ::1/128 scope host         valid_lft forever preferred_lft forever 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 1000     link/ether 52:54:00:00:00:06 brd ff:ff:ff:ff:ff:ff     inet 192.168.4.228/24 brd 192.168.4.255 scope global eth0     inet6 fe80::5054:ff:fe00:6/64 scope link         valid_lft forever preferred_lft forever 

Host is connected to Samsung Galaxy Tab 3 via wlp5s0 interface. I have other devices connected to Tab. Question is how can I get access to my VMs from these devices? Another words how to make my VMs visible in external network? I know how to solve problem using VPN, but it seems to me that more simple solution (using Linux standard utils) should exist.

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