I'm an undergraduate research assistant working on a Linux server without root privilege. I'm trying to install the Rstudio server but the Rstudio website only provides the installation method for sudoers. Is it possible to install it without root access? I'm asking because I'm really not sure if I could get access from the manager. Any help will be appreciated!
No, you can't install it without root access. But there are a couple of things you could do to piece together a solution. Here are two options:
Extract the server and run it directly
You have to be root to install packages, so you can't install the .deb/.rpm file yourself. However, you could extract the contents of the file to a directory inside your home directory and run RStudio Server from there, by executing the rserver program in a regular shell.
Note that this will probably require an afternoon of editing the rserver.conf file to tell it where to find the rest of the files in the installation (since it presumes they are installed in /usr/lib by default). You can get some inspiration for how to do this here: https://github.com/rstudio/rstudio/blob/master/src/cpp/conf/rserver-dev.conf
Run the desktop version and forward the graphics
The other route is to run RStudio Desktop on the server; we make several builds of RStudio Desktop that are installer-less and can just be unpacked into your home directory. Then run an X11 server on your own computer and an X11 client on the RStudio server, so that the RStudio Desktop instance appears on your computer instead of the server.
Yes, you can run rserver without root priveliges.
For RStudio 1.4 I patched the following line into src/cpp/core/LogOptions.cpp
const FilePath kDefaultLogPath = core::system::xdg::userDataDir().completePath("log");
Then you need to set the system environment variables to some location read-writeable for the user, like
RSTUDIO_CONFIG_DIR=$HOME/.config/rstudio
RSTUDIO_CONFIG_HOME=$HOME/.config/rstudio
RSTUDIO_DATA_HOME=$HOME/.local/share/rstudio
And start rserver with the option
--server-data-dir={directory writeable for user}
--server-pid-file={file-path creatable for user}
--database-config-file={config-file}
With these adjustments it runs for me when I start it as a simple user (no root privileges) with
rserver --auth-none=1 --www-frame-origin=same --www-port={port} --www-verify-user-agent=0 --server-data-dir={my-tmp-path} --server-pid-file={my-tmp-path}/rstudio.pid --database-config-file={my-tmp-path}/db.conf}
ATTENTION:
But be aware, that anyone who can reach your system and the specified port from the network has access to the running RStudio in his browser and therefore can run any command in the name of the user on your system now.
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"
I am working with Unix and from now on I need to use the University server to run some packages in R.
1.I assessed the server by ssh
2.I downloaded miniconda
3.source ~/.bashrc
4.Downloaded Rstudio
5. conda install -c r rstudio
And when I am trying to open Rstudio I am receiving the following error
'QXcbConnection: Could not connect to display'
Any help will be super useful.
Depending you your platform and your university's security policy this may or may not work
https://unix.stackexchange.com/questions/12755/how-to-forward-x-over-ssh-to-run-graphics-applications-remotely
In short you need to explicitly enable X11 forwarding (though I was under the impression that it is on by default). Also you need to run an X11 server, there are a few on windows and MacOS. If the above does not help, it is most likely due to a security policy and you may want to speak to your university's SysAdmin
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've a cellphone connected as MTP to my computer (windows 7) and shows up as a 'Portable Device'. I want to copy all .apk files from all subdirectories of this device.
But using the search function of windows I can't copy from multiple directories and xcopy or xxcopy command line tools require my USB device to have a drive letter assigned. Which is not possible for a MTP connection (correct me if I'm wrong).
Forget the Portable Device of the USB option.
On phone
Download a server app such as WebDAV Server. This mounts your
phone roots directory over your local WiFi connection
Open app and start WebDAV server (mine: http://192.168.1.113:8080)
On pc
Assign a map network drive from the command prompt. Open cmd.exe and type net use s: //192.168.1.113:8080 (this will assign drive letter s to the UNC path.
Stay in cmd.exe and use xxcopy to copy all .apk from all subdirectories from the device into one folder by the following command: XXCOPY S:\*.apk C:\myapks\ /SGN. (the SGN command sorts the files, with newest files first)
downside: DAV is slow
sources:
step 1 and 2 - step 3 - step 4