I'm using qemu as my raspberry pi emulator.
I use IDE for writing my codes in windows and I am having a hard time in transferring files every time from my windows to qemu.
I tried using winscp, but it did not allow me to connect using default credentials.
Is there anything I need to do or configure to use winscp for transferring files directly??
Go to https://azeria-labs.com/emulate-raspberry-pi-with-qemu/
$ qemu-system-arm -kernel ~/qemu_vms/<your-kernel-qemu> -cpu arm1176 -m 256 -M versatilepb -serial stdio -append "root=/dev/sda2 rootfstype=ext4 rw" -hda ~/qemu_vms/<your-jessie-image.img> -redir tcp:5022::22 -no-reboot
scp -P 5022<file_to_transfer> pi#127.0.0.1:~
Another handy way: :)
Mount .img file in your host (Use Disk Image Mounter in Linux , Don't forget to mount it in non read-only mode)
Add your file to this img file (Don't add it in boot partition)
Umount the img
Load .img file in qemu and find your file in proper path
Related
I am using redhat OS in virtual box. I have mounted my Server's (windows 2012 R2) hard disk
on my redhat(/home/user1/myfolder) using
sudo mount -t cifs //192.168.100.1/myfolder/ /home/user1/myfolder -o username=MyRegisteredUserNameForServer
Problem:
I can read write and executes the file stored in that server.
Also, using 'sudo nano myfile.txt' I can create a file in the mounted folder "/home/user1/myfolder" but when I try to execute any script that creates files, it says permission denied.
eg: python myscript.py > output.txt
"permission denied"
I tried a lot to get into it but couldn't find the issue.
finally the below worked:
sudo mount -t cifs -o user=MyRegisteredUserNameForServer,password=P#ssw0rd,dir_mode=0777,file_mode=0777 //192.168.100.1/myfolder /home/user1/myfolder
I am trying to emulate a Raspberry Pi zero W with Qemu based on an image I used on a real Raspberry Pi zero W.
The command I am using is:
sudo qemu-system-arm \
-kernel ./qemu-rpi-kernel/kernel-qemu-4.9.59-stretch \
-append "root=/dev/sda2 panic=1 rootfstype=ext4 rw" \
-hda pi_zero_kinetic_raspbian.qcow \
-cpu arm1176 -m 512 \
-M versatilepb \
-no-reboot \
-serial stdio \
-net nic -net user \
-net tap,ifname=vnet0,script=no,downscript=no
But Qemu complain that Error: unrecognized/unsupported machine ID (r1 = 0x00000183)
So added this option:
-dtb linux/arch/arm/boot/dts/bcm2835-rpi-zero-w.dts
But In this case:
qemu-system-arm: Unable to copy device tree in memory
Couldn't open dtb file qemu-rpi-kernel/tools/linux/arch/arm/boot/dts/bcm2835-rpi-zero-w.dts
So I tried to compile the dts in order to get the dtb with:
dtc -O dtb -o bcm2835-rpi-zero-w.dtb bcm2835-rpi-zero-w.dts
But the compilation fail and I get:
Error: bcm2835-rpi-zero-w.dts:13.1-9 syntax error
FATAL ERROR: Unable to parse input tree
I couldn't find any tutorial about Pi zero and all the tutorial about the first Rapsberry Pi seems to be outdated. I am not sure that compiling the dtb on my own is the way to go.
Any input would be appreciated, thanks!
This isn't going to work, because the QEMU option "-M versatilepb" says "emulate a VersatilePB development board", which will not run a kernel that is intended to boot on the Pi Zero. The versatilepb board does not have devices in the places that a Pi Zero DTB file says they are, so if you provide the kernel with a Pi Zero DTB then the kernel is going to crash immediately because it can't find anything where it expects.
In general Arm devboards are not like x86 -- they are all different, and you can't just boot a kernel intended for one on a different one. This is in fact what the "unrecognized machine ID" error is telling you -- it's from the guest kernel, and it's saying "I can't boot on this board".
You need to either:
use -M versatilepb and pass QEMU a kernel and dtb intended for that machine, not some other one
use some other -M option and a kernel and dtb that work with it (for instance we support 'raspi2' now for a RaspberryPi 2 board model, with some notable caveats including "no USB, no networking")
Also, as you seem to have discovered, -dtb wants a DTB file (the compiled binary), not a DTS file (the source).
I want to configure the qemu to attach a specific block device to the VM?
Following is the command I am using now:
qemu-system-x86_64 -enable-kvm -machine type=pc,accel=kvm
-cpu host -nographic -k de -usb -m 2048
-net nic -net user,hostfwd=tcp::3388-:22
ubuntu16.04.qcow2
I know that following is the virsh command to do this:
virsh attach-disk ubuntuVM /dev/vdb
But I want to specify this in the above command line (Don't want to use virsh). Does anyone know how to do this?
Kind Regards
Simply add the following option to your command:
-drive file=/dev/sdd,format=raw,if=virtio
This will add a drive, the file parameter can also point to block devices, be sure to set the format parameter to "raw".
Additionally you can set the if parameter to "virtio" if the guest supports it (via module or driver) for better performance.
I am using centos 6.9 and want to install xampp. But when I run the command on the terminal it showing error i.e. cannot execute binary file. So, How can I fix this problem and successfully install xampp ? Please help me.
chmod +x xampp-linux-x64-7.0.22-0-installer.run
./xampp-linux-x64-7.0.22-0-installer.run
after this command it showing
bash: ./xampp-linux-x64-7.0.22-0-installer.run: cannot execute binary file
You're probably running the install (binary) with a lesser privileged user. You'll have to use root user for modifying SELinux settings as such:
semanage fcontext -a -t httpd_sys_script_exec_t '/<install-location>(/.*)/?'
restorecon -R -v /<install-location>/
I am making a MJPEG video stream using Raspberry Pi with dedicated Pi Camera. For this I am using jpeg libraries and the following web application found on Github. The use is pretty straightforward, you just type cd mjpg-streamer/mjpg-streamer-experimental and then ./mjpg_streamer -o "output_http.so -w ./www" -i "input_raspicam.so". However, I would like to make it run on every reboot, so that the camera is "maintenance free".
I researched that I need to put the path and the executable file in the /etc/rc.local. Nevertheless, when I put the path (mjpg-streamer/mjpg-streamer-experimental/mjpg_streamer -o "output_http.so -w ./www" -i "input_raspicam.so") to this executable file, it did not work at all. I tried to run the stream as one command in the Terminal, it did not work either. I also tried to set up a variable PATH in .bashrc in order to access it from /etc/rc.local, but it also did not want to work.
I suspect it might have something to do with command ./mjpg_streamerneeding some input for it to work (-o "output_http.so -w ./www" -i "input_raspicam.so")
Do you have any idea how to start it with every reboot?
Thanks for your time and help
i have solved similar issue for my rpi and jpeg streamer as following.
create a shell script in /home/pi
touch /home/pi/mjpg-streamer.sh
edit that shell script and add this content
#!/bin/bash
cd /home/pi/mjpg-streamer/mjpg-streamer-experimental/
LD_LIBRARY_PATH=.
./mjpg_streamer -o "output_http.so -w ./www" -i "input_raspicam.so"
make sure new shell script has execution rights
add that shell script to your /etc/rc.local