I need my application to run from a USB stick and perform the installation from there.
The application is eventually installed on a Linux/Debian.
For the application installation I need a DB to be installed on that USB. I also need the DB data (tables, etc.) to be kept on that USB stick.
I read that SQLite is a good candidate to be used for such a purpose. However, I could no find the steps needed for installing it on the USB stick.
I did download the sqlite-snapshot-202002271621.tar.gz from the sqlite.org site, placed it in one of my Debian directories and used the 3 commands to install it (./configure,make,make install).
That installed SQLite on my hard disk.
What should I do in order to achieve the same on the USB stick?
Mount the USB to the Debian box, place the tar.gz file there, and run the commands from there?
Will that install SQLite on the USB?
Thanks
So the answer is indeed:
Mount the USB to the Debian box
Place the sqlite-snapshot-202002271621.tar.gz file there
Run the commands from there
./configure
make
make install
Notice just that I had to tar the sqlite-snapshot-202002271621.tar.gz file using:
tar -zvxf sqlite-snapshot-202002271621.tar.gz -C /media/usbstick/ --no-same-owner
In order to avoid the error:
"Cannot change ownership to uid 1000, gid 1000: Operation not permitted"
Related
So i was trying to install the XP Pen Driver for my Deco 01 v2 graphics tablet on my Linux Mint 19.2 Tina when i came to encounter the following error:
./Pentablet_Driver: /usr/lib/x86_64-linux-gnu/libQt5Core.so.5: version `Qt_5.10' not found (required by ./Pentablet_Driver)
I went on to install qt 5.10, still the same error. Others suggested to just change the path wth sudo gedit /etc/ld.so.conf.d/randomLibs.conf which didn't change a thing.
Link to drivers:
https://www.xp-pen.com/download-440.html
The manufacturer has a page describing how to set up their software on Linux with pictures. However, when following them, you end up with a folder name somewhere along the line that has spaces in it, which causes issues.
So a modified set of instructions might look like this:
Connect your XP-Pen product to the computer.
Download the Linux Beta driver from XP-Pen official website.
When the download is complete, extract the compressed folder.
Rename the extracted folder to something without spaces.
Inside the renamed folder is another compressed folder which should be extracted.
Inside the final extracted folder, ensure "Pentablet_Driver.sh" has execution permissions by right clicking on it and going to "Properties->Permissions" and verifying that "Allow executing file as program" is checked.
Open the terminal. (CTRL+ALT+T)
Type "sudo ", then drag Pentablet_Driver.sh from the file browser onto the terminal.
Type the password to complete.
Make sure that you write exactly
sudo ./Pentablet_Driver.sh
instead
sudo ./Pentablet_Driver
I had the same error until I noticed that I forgot to add .sh at the end.
I'm trying to run xv6 operating system on VirtualBox or VMWare in a Linux host. The official instructions said how to run the OS on qemu only. However, the official page (https://pdos.csail.mit.edu/6.828/2014/xv6.html) mentioned that xv6 can be booted directly on hardware also, but it's not clear how.
I want to boot xv6 on VirtualBox or VMware first. I extracted the following command from the Makefile, which runs xv6 from the command line after it's compiled using make command.
/usr/bin/qemu-system-i386 -serial mon:stdio -drive file=fs.img,index=1,media=disk,format=raw -drive file=xv6.img,index=0,media=disk,format=raw -smp 2 -m 512
Please help me how to proceed. If the procedure is already documented some reference will be helpful.
The instructions are here which is linked (via 6.828 tools page) from your link though they are a bit terse:
Using a Virtual Machine
Otherwise, the easiest way to get a compatible toolchain is to install
a modern Linux distribution on your computer. With platform
virtualization, Linux can cohabitate with your normal computing
environment. Installing a Linux virtual machine is a two step process.
First, you download the virtualization platform.
VirtualBox (free for Mac, Linux, Windows) — Download page
VMware Player (free for Linux and Windows, registration required)
VMware Fusion (Downloadable from IS&T for free).
VirtualBox is a little slower and less flexible, but free!
Once the virtualization platform is installed, download a boot disk
image for the Linux distribution of your choice.
Ubuntu Desktop is what we use.
This will download a file named something like
ubuntu-10.04.1-desktop-i386.iso. Start up your virtualization platform
and create a new (32-bit) virtual machine. Use the downloaded Ubuntu
image as a boot disk; the procedure differs among VMs but is pretty
simple. Type objdump -i, as above, to verify that your toolchain is
now set up. You will do your work inside the VM.
I can see how one could read that and not see the answer.
After the virtual machine is installed, download the Ubuntu Desktop .iso. Install that into the VM and fire it up. Presumably the Desktop will provide a clear mechanism for loading your OS. (Wait, I'm giving it a try. Will update with the result.)
Turns out that is simply a Ubuntu client desktop, and isn't anything special for running a sub-operating system.
Looking around some more, I found the commentary to be the best potential clue. It contains this (head scratcher) phrase:
To run xv6, install the QEMU PC simulators. To run in QEMU, run "make qemu".
If only it specified the context to get to that point! (Sorry I am not more help.)
I see that you want to boot it on VirtualBox or VMware, but another option would be to using docker to run xv6. A great guide for getting started with xv6 through docker is here.
The full guide is elaborate and can help you with getting started.
It is an alternative option, but one that can get you going fast hopefully.
It will only take 4 steps to get going with the xv6:
Step 1
Download and set up docker here
Step 2
- Run this command in PowerShell or bash to pull the ubuntu image with xv6 docker pull grantbot/xv6
Step 3
- To run the docker image and get going with xv6 run this command docker run -it grantbot/xv6
Step 4
- Now inside the shell in the ubuntu image run cd /home/a/xv6-public/ to enter the root folder of the xv6.
Done
- Now you can compile and run the xv6 with make qemu-nox
Step 1.Compile xv6
Download the code, unzip it and enter the directory, compile the operating system image and root file system, the command is as follows:
make xv6.img&&make fs.img
Step 2. Write image to disk
Create two disks in a existed vmware virtual machine（my vmware version is 15.2.2, linux version is Centos7.8）, the operation steps are: virtual machine settings -> add -> disk -> SCSI -> create a new virtual disk -> size 0.005 (allocate immediately, single file) -> name the disk "os", which means this disk is the operating system.
Create another disk named "fs" in the same way to put the root file system.
At this time, there should be "sdb" and "sdc" in the /dev/ directory (sda is the current operating system itself). If you do not see the "sdb" and "sdc", restart the guest operating system.
Write the operating system and root file system to the disk with the following command:
dd if=./xv6.img of=/dev/sdb bs=4k count=1000
dd if=./fs.img of=/dev/sdc bs=4k count=1000
shutdown the current virtual machine to ensure that the file has sync to the disk. At this time, the two images have been written to the disk, vmware saves the disk as a file, the location is in the directory of the current virtual machine, named os.vmdk, fs.vmdk, the next step will load these two files into the new virtual machine.
Step 3. Create xv6 virtual machine
To create an empty virtual machine, the operation steps are: customize (advanced) -> next -> install the operating system later -> choose other operating system type (choose other versions) -> take the virtual machine name as xv6 (name depend on you) ) -> Then use the default configuration all the way to "Next" to completion.
Right-click the created virtual machine and delete the disk created by default. Add the disk file created in the previous step to the current virtual machine. The operation steps are: add -> "disk" -> ide (note that this is an IDE instead of a SCSI disk, because xv6 reads an IDE format disk) -> use an existing virtual disk -> select the os.vmdk generate in the step 2->complete
Add fs.vmdk in the same way. Note that you must add os.vmdk first. Because os.vmdk is the operating system, it needs to be the first hard disk.
Now, you create a virtual machine which has two disk. one is os disk, another is root file system disk, all is ready.
Start the virtual machine, and the xv6 will start successfully.
I can't install curl on my MR-3020 because there is not enough space. This is a problewm for all devices with small boards
Even when I remove all the non essential packages, it does not have space for the dependent packages. Common solution is to use an external USB drive but that's not an option for me because I use the USB drive for a modem.
After much struggle I found a solution here that I thought I would share with the community:
Edit /etc/rc.local with:
opkg update
opkg install curl -d ram
rm /tmp/opkg-lists/*
So that it would just install it to ram on reboot so it would be available. You may need to edit your exports so it can find it in the ram destination.
export LD_LIBRARY_PATH='/lib:/usr/lib:/tmp/lib:/tmp/usr/lib'
export PATH='/bin:/sbin:/usr/bin:/usr/sbin:/tmp/usr/bin:/tmp/usr/sbin'
This way I am able to use it as if it were installed locally and not just re-installed on reboot.
I'm new to R and I decided to put R on a machine I have and see if I can remotely run code that is on my desktop computer.
While searching for "how to do" that, I came across the names "Rserve" and "RStudio". As far as I could tell, RServe is a package (actually, it seems to be the package) which I can use to configure the server, while RStudio is an IDE.
My question is: does RStudio use RServe "under the hood"? And, if it doesn't, then how does RStudio compare to RServe? (I.e., which one is better and why?)
[I figured out that this question could possibly be a duplicate, but I couldn't find any similar question]
Rserve is a client server implemenation written in pure c that starts a server and spawns multiple processes each with it's own R workspace. This is not threads but processes due to R's limitation on multithreading. It uses a QAP packing protocol as it's primary form of transport between the client and the server. You execute commands via the client (PHP, Java, C++) to the server and it returns you REXP objects that are essentially mappings to R's underlying SEXP data objects. Rserve also offers a websockets version that does will can transmit data through websockets but the api is not well documented. It also supports basic authentication through a configuration file.
Rstudio is a C++ and gwt application that provides a web based front end to R. AFAIK it uses json as it's primary transport and supports authentication through pam. Each user has a workspace configured in their home directory. It runs a server very similar but not the same as Rserve to communicate with R using RCPP. It also has it's own plotting driver used to wrap the plot device so that it can pickup the plots to be served to the ui. It has much more functionality such as stepping through your code from the ui and viewing workspace variables.
Functionally they are similar in that they provide a client/server connection to R but IMHO the comparison stops there.
I believe they are separate projects (though I could be wrong). I've never heard of RServe and there does not appear to be any mention of it in the documentation for RStudio. I have used and would recommend RStudio Server. It is relatively easy to set up and super easy to use once it is set up. This is a helpful guide to setting up a server on Amazon EC2:
#Create a user, home directory and set password
sudo useradd rstudio
sudo mkdir /home/rstudio
sudo passwd rstudio
#Enter Password
sudo chmod -R 0777 /home/rstudio
#Update all files from the default state
sudo apt-get update
sudo apt-get upgrade
#Be Able to get R 3.0
sudo add-apt-repository 'deb http://cran.rstudio.com/bin/linux/ubuntu precise/'
#Update files to use CRAN mirror
#Don't worry about error message
sudo apt-get update
#Install latest version of R
#Install without verification
sudo apt-get install r-base
#Install a few background files
sudo apt-get install gdebi-core
sudo apt-get install libapparmor1
#Change to a writeable directory
#Download & Install RStudio Server
cd /tmp
wget http://download2.rstudio.org/rstudio-server-0.97.551-amd64.deb
sudo gdebi rstudio-server-0.97.551-amd64.deb
#Once you’ve installed the above commands, you can now access RStudio through your local browser. Navigate to the Public DNS of your image on port 8787, similar to:
#http://ec2-50-19-18-120.compute-1.amazonaws.com:8787
The earlier answer about 3 years old provide old information, such as here.
Updated correction
RStudio is a firm that provides the open source RStudio IDE for R. They also sell commercial services such as RStudio Server Pro that markets itself with load balancing and related things. Apparently, the successuful open source project has lead the way to markets.
You may also mean Microsoft R Server, which is now called Microsoft Machine Learning Server?
There is also RServer by RStudio.
Anyway how to install both can be found here.
My programming experience is about 1 year of C/C++ experience from high school, but I did my research and wrote a simple program with OpenCL a few months ago. I was able to compile and run this on an Apple computer relatively easily with g++ and the --framework option. Now I'm on my Ubuntu machine and I have no idea how to compile it. The correct drivers have been downloaded along with ATI's Stream SDK (I have an ATI Radeon HD5870). Any help would be appreciated!
Try
locate libOpenCL.so
If it is in one of the standard directories (most likely /usr/lib, or /usr/local/lib) you need to replace "--framework OpenCL" with "-lOpenCL". If g++ cannot find the lib you can tell g++ to look in a specific directory by adding "-L/path/to/library".
I wish I had my Linux to be more helpful... It is probably best if you redownload the ati-stream-sdk, after extracting it, open the Terminal and "cd /path/to/extracted/files"; in that directory execute make && sudo make install
make you probably know this from windows, this compiles, whatever needs to be compiled
&& chains commands together, the following commands will only be executed if the first command succeeded
sudo make install this will put the files in the expected places (sudo executes a command with superuser priviledges, you will have to enter your password)
Hope that helps.
You might be missing the dynamic libraries from the dynamic linker configuration.
Search for where the libraries are. Most likely /usr/lib, or /usr/local/lib.
Make sure the path location is also configured at one of these places:
LD_LIBRARY_PATH - you can set it in you environment shell, like .bashrc
/etc/ld.so.conf - you will need to call ldconfig to update the cache and it requires root access to change the file.
Reason
Aside from #bjoernz, my system can't find the libOpenCL.so file
It's because the correct file directory is missing
After searchig over the internet, I found out that libOpenCL.so file can provided by ocl-icd-opencl-dev package
Solution
You just need to install the package mentioned above by typing into cmd
sudo apt update
sudo apt install ocl-icd-opencl-dev
Therefore, libOpenCL.so can be found under /usr/lib/x86_64-linux-gnu/ folder
My System Information
OS: Ubuntu 16.04 LTS
GPU: NVIDIA GeForce GTX 660
GPU Driver: nvidia-375
OpenCL: 1.2
Reference:
[1] How to install libOpenCL.so on ubuntu
[2] How to set up OpenCL in Linux