Using this command find $FOAM_TUTORIALS -type f -name fvSchemes|xargs grep -rh div\(phi,U\)|sort, I get:

    div(div(phi,U)) Gauss linear;
    div(div(phi,U)) Gauss linear;
    div(div(phi,U)) Gauss linear;
    div(phi,U)      bounded Gauss limitedLinear 0.2;
    div(phi,U)      bounded Gauss limitedLinear 0.2;
    div(phi,U)      bounded Gauss limitedLinear 0.2;
    div(phi,U)      bounded  Gauss limitedLinearV 1;
    div(phi,U)      bounded Gauss limitedLinearV 1;
    div(phi,U)      bounded Gauss limitedLinearV 1;
    div(phi,U)          bounded Gauss linear;
    div(phi,U)      bounded Gauss linear;
    div(phi,U)      bounded Gauss linear;
    div(phi,U)      bounded Gauss linear;
    div(phi,U)      bounded Gauss linear;
    div(phi,U)          bounded Gauss linearUpwind grad;
    div(phi,U)       bounded Gauss linearUpwind grad(U);
    div(phi,U)      bounded Gauss linearUpwind grad(U);
    div(phi,U)      bounded Gauss linearUpwind grad(U);
    div(phi,U)      bounded Gauss linearUpwind grad(U);
    div(phi,U)      bounded Gauss linearUpwind grad(U);
    div(phi,U)      bounded Gauss linearUpwind grad(U);
    div(phi,U)         bounded Gauss linearUpwind gradUConv;
    div(phi,U)         bounded Gauss linearUpwind gradUConv;
    div(phi,U)         bounded Gauss linearUpwind gradUConv;
    div(phi,U)         bounded Gauss linearUpwind gradUConv;
    div(phi,U)         bounded Gauss linearUpwind gradUConv;
    div(phi,U)         bounded Gauss linearUpwind gradUConv;
    div(phi,U)         bounded Gauss linearUpwind gradUConv;
    div(phi,U)         bounded Gauss linearUpwind gradUConv;
    div(phi,U)         bounded Gauss linearUpwind gradUConv;
    div(phi,U)      bounded Gauss linearUpwind gradUConv;
    div(phi,U)      bounded Gauss linearUpwind gradUConv;
    div(phi,U)      bounded Gauss linearUpwind gradUConv;
    div(phi,U)      bounded Gauss linearUpwind gradUConv;
    div(phi,U)      bounded Gauss linearUpwind gradUConv;
    div(phi,U)      bounded Gauss linearUpwind gradUConv;
    div(phi,U)      bounded Gauss linearUpwind gradUConv;
    div(phi,U)      bounded Gauss linearUpwind gradUConv;
    div(phi,U)      bounded Gauss linearUpwind gradUConv;
    div(phi,U)      bounded Gauss linearUpwind gradUConv;
    div(phi,U)      bounded Gauss linearUpwind gradUConv;
    div(phi,U)          bounded Gauss linearUpwind limited;
    div(phi,U)      bounded Gauss linearUpwind limited;
    div(phi,U)      bounded Gauss linearUpwind limited;
    div(phi,U)      bounded Gauss linearUpwind limited;
    div(phi,U)      bounded Gauss linearUpwind unlimited;
    div(phi,U)      bounded Gauss linearUpwind unlimited;
    div(phi,U)              bounded Gauss linearUpwindV grad(U);
    div(phi,U)              bounded Gauss linearUpwindV grad(U);
    div(phi,U)      bounded Gauss linearUpwindV grad(U);
    div(phi,U)      bounded Gauss linearUpwindV grad(U);
    div(phi,U)      bounded Gauss linearUpwindV grad(U);
    div(phi,U)      bounded Gauss linearUpwindV grad(U);
    div(phi,U)      bounded Gauss linearUpwindV grad(U);
    div(phi,U)      bounded Gauss linearUpwindV grad(U);
    div(phi,U)      bounded Gauss linearUpwindV grad(U);
    div(phi,U)      bounded Gauss localBlended linearUpwindV grad(U) linear;
    div(phi,U)      bounded Gauss LUST grad(U);
    div(phi,U)                    bounded Gauss upwind;
    div(phi,U)          bounded Gauss upwind;
    div(phi,U)          bounded Gauss upwind;
    div(phi,U)          bounded Gauss upwind;
    div(phi,U)          bounded Gauss upwind;
    div(phi,U)      bounded Gauss upwind;
    div(phi,U)      bounded Gauss upwind;
    div(phi,U)      bounded Gauss upwind;
    div(phi,U)      bounded Gauss upwind;
    div(phi,U)      bounded Gauss upwind;
    div(phi,U)      bounded Gauss upwind;
    div(phi,U)      bounded Gauss upwind;
    div(phi,U)      bounded Gauss upwind;
    div(phi,U)      bounded Gauss upwind;
    div(phi,U)      bounded Gauss upwind;
    div(phi,U)      bounded Gauss upwind;
    div(phi,U)      bounded Gauss upwind;
    div(phi,U)      bounded Gauss upwind;
    div(phi,U)      bounded Gauss upwind;
    div(phi,U)      bounded Gauss upwind;
    div(phi,U)      bounded Gauss upwind;
    div(phi,U)      bounded Gauss upwind;
    div(phi,U)      bounded Gauss upwind;
    div(phi,U)      bounded Gauss upwind;
    div(phi,U)      bounded Gauss upwind;
    div(phi,U)      bounded Gauss upwind;
    div(phi,U)      bounded Gauss upwind;
    div(phi,U)      bounded Gauss upwind;
    div(phi,U)      bounded Gauss upwind;
    div(phi,U)      Gauss CoBlended
    div(phi,U)      Gauss cubic;
    div(phi,U)      Gauss cubic;
    div(phi,U)      Gauss DEShybrid
    div(phi,U)      Gauss DEShybrid
    div(phi,U)      Gauss limitedLinear 1;
    div(phi,U)          Gauss limitedLinearV 1;
    div(phi,U)          Gauss limitedLinearV 1;
    div(phi,U)      Gauss limitedLinearV 1;
    div(phi,U)      Gauss limitedLinearV 1;
    div(phi,U)      Gauss limitedLinearV 1;
    div(phi,U)      Gauss limitedLinearV 1;
    div(phi,U)      Gauss limitedLinearV 1;
    div(phi,U)      Gauss limitedLinearV 1;
    div(phi,U)      Gauss limitedLinearV 1;
    div(phi,U)      Gauss limitedLinearV 1;
    div(phi,U)      Gauss limitedLinearV 1;
    div(phi,U)      Gauss limitedLinearV 1;
    div(phi,U)      Gauss limitedLinearV 1;
    div(phi,U)      Gauss limitedLinearV 1;
    div(phi,U)      Gauss limitedLinearV 1;
    div(phi,U)      Gauss limitedLinearV 1;
    div(phi,U)      Gauss limitedLinearV 1;
    div(phi,U)      Gauss limitedLinearV 1;
    div(phi,U)      Gauss limitedLinearV 1;
    div(phi,U)      Gauss limitedLinearV 1;
    div(phi,U)      Gauss limitedLinearV 1;
    div(phi,U)      Gauss limitedLinearV 1;
    div(phi,U)      Gauss limitedLinearV 1;
    div(phi,U)      Gauss limitedLinearV 1;
    div(phi,U)      Gauss limitedLinearV 1;
    div(phi,U)      Gauss limitedLinearV 1;
    div(phi,U)      Gauss limitedLinearV 1;
    div(phi,U)      Gauss limitedLinearV 1;
    div(phi,U)      Gauss limitedLinearV 1;
    div(phi,U)      Gauss limitedLinearV 1;
    div(phi,U)      Gauss limitedLinearV 1;
    div(phi,U)      Gauss limitedLinearV 1;
    div(phi,U)      Gauss limitedLinearV 1;
    div(phi,U)      Gauss limitedLinearV 1;
    div(phi,U)      Gauss limitedLinearV 1;
    div(phi,U)      Gauss limitedLinearV 1;
    div(phi,U)      Gauss linear;
    div(phi,U)      Gauss linear;
    div(phi,U)      Gauss linear;
    div(phi,U)      Gauss linear;
    div(phi,U)      Gauss linear;
    div(phi,U)      Gauss linear;
    div(phi,U)      Gauss linear;
    div(phi,U)      Gauss linear;
    div(phi,U)      Gauss linear;
    div(phi,U)      Gauss linear;
    div(phi,U)      Gauss linear;
    div(phi,U)      Gauss linear;
    div(phi,U)      Gauss linear;
    div(phi,U)      Gauss linear;
    div(phi,U)      Gauss linear;
    div(phi,U)      Gauss linear;
    div(phi,U)      Gauss linear;
    div(phi,U)      Gauss linear;
//    div(phi,U)      Gauss linear;
    div(phi,U)      Gauss linearUpwind grad(U);
    div(phi,U)      Gauss linearUpwind grad(U);
    div(phi,U)      Gauss linearUpwind grad(U);
    div(phi,U)      Gauss linearUpwind grad(U);
    div(phi,U)      Gauss linearUpwind grad(U);
    div(phi,U)      Gauss linearUpwind grad(U);
    div(phi,U)      Gauss linearUpwind grad(U);
    div(phi,U)      Gauss linearUpwind grad(U);
    div(phi,U)      Gauss linearUpwind grad(U);
    div(phi,U)      Gauss linearUpwind grad(U);
    div(phi,U)      Gauss linearUpwind grad(U);
    div(phi,U)      Gauss linearUpwind grad(U);
    div(phi,U)      Gauss linearUpwind grad(U);
    div(phi,U)      Gauss linearUpwind grad(U);
    div(phi,U)      Gauss linearUpwind grad(U);
    div(phi,U)      Gauss linearUpwind grad(U);
    div(phi,U)      Gauss linearUpwind grad(U);
    div(phi,U)          Gauss linearUpwind limited;
    div(phi,U)          Gauss linearUpwind limited;
    div(phi,U)      Gauss linearUpwind limited;
    div(phi,U)      Gauss linearUpwindV grad(U);
    div(phi,U)      Gauss LUST grad(U);
    div(phi,U)      Gauss LUST grad(U);
    div(phi,U)      Gauss LUST grad(U);
    div(phi,U)      Gauss LUST grad(U);
    div(phi,U)      Gauss LUST grad(U);
    div(phi,U)      Gauss LUST grad(U);
    div(phi,U)      Gauss LUST grad(U);
    div(phi,U)      Gauss LUST grad(U);
    div(phi,U)      Gauss LUST grad(U);
    div(phi,U)      Gauss LUST grad(U);
//    div(phi,U)      Gauss LUST grad(U);// linear;
    div(phi,U)      Gauss LUST unlimitedGrad(U);
    div(phi,U)      Gauss skewCorrected linear;
    div(phi,U)          Gauss upwind;
    div(phi,U)          Gauss upwind;
    div(phi,U)      Gauss upwind;
    div(phi,U)      Gauss upwind;
    div(phi,U)      Gauss upwind;
    div(phi,U)      Gauss upwind;
    div(phi,U)      Gauss upwind;
    div(phi,U)      Gauss upwind;
    div(phi,U)      Gauss upwind;
    div(phi,U)      Gauss upwind;
    div(phi,U)      Gauss upwind;
    div(phi,U)      Gauss upwind;
    div(phi,U)      Gauss upwind;
    div(phi,U)      Gauss upwind;
    div(phi,U)      Gauss upwind;
    div(phi,U)      Gauss upwind;
    div(phi,U)      Gauss upwind;
    div(phi,U)      Gauss upwind;
    div(phi,U)      Gauss upwind;
    div(phi,U)      Gauss upwind;
    div(phi,U)      Gauss upwind;
    div(phi,U)      Gauss upwind;
    div(phi,U)      Gauss upwind;
    div(phi,U)      Gauss upwind;
    div(phi,U)      Gauss upwind;
    div(phi,U)      Gauss upwind;
    div(phi,U)      Gauss upwind;
    div(phi,U)      Gauss upwind;
    div(phi,U)      Gauss upwind;
    div(phi,U)      Gauss upwind;
    div(phi,U)      Gauss upwind;
    div(phi,U)      Gauss upwind;
    div(phi,U)      Gauss upwind;
    div(phi,U)      Gauss upwind;
    div(phi,U)      Gauss upwind;
    div(phi,U)      Gauss upwind;
    div(phi,U)      Gauss upwind;
    div(phi,U)      Gauss upwind;
    div(phi,U)      Gauss upwind;
    div(phi,U)      Gauss upwind;
//    div(phi,U)      Gauss upwind;
//    div(phi,U)      Gauss upwind;
//    div(phi,U)      Gauss upwind;
//    div(phi,U)      Gauss upwind;
//    div(phi,U)      Gauss upwind;
    div(phi,U)      Gauss upwind;//linearUpwind grad(U);
    div(phi,U)      Gauss vanLeerV;

I want the redundant lines to be shown only once, like this:

div(phi,U)      bounded Gauss limitedLinear 0.2;
div(phi,U)      bounded Gauss limitedLinearV 1;
div(phi,U)      bounded Gauss linear;
div(phi,U)      bounded Gauss linearUpwind grad;
div(phi,U)      bounded Gauss linearUpwind grad(U);
div(phi,U)      bounded Gauss linearUpwind gradUConv;
div(phi,U)      bounded Gauss linearUpwind limited;
div(phi,U)      bounded Gauss linearUpwind unlimited;
div(phi,U)      bounded Gauss linearUpwindV grad(U);
div(phi,U)      bounded Gauss localBlended linearUpwindV grad(U) linear;
div(phi,U)      bounded Gauss LUST grad(U);
div(phi,U)      bounded Gauss upwind;
div(phi,U)      Gauss CoBlended 0.01 limitedLinearV 1 0.05 linearUpwind grad(U);
div(phi,U)      Gauss cubic;
div(phi,U)      Gauss DEShybrid linear linearUpwind grad(U) hmax 0.65 1 0.028 0 1 1;
div(phi,U)      Gauss DEShybrid linear linearUpwind grad(U) hmax 0.65 1 1 0 1 1;
div(phi,U)      Gauss limitedLinear 1;
"div\(phi.*,U.*\)" Gauss limitedLinearV 1;
div(phi,U)      Gauss limitedLinearV 1;
div(phi,U)      Gauss linear;
div(phi,U)      Gauss linearUpwind grad(U);
div(phi,U)      Gauss linearUpwind limited;
div(phi,U)      Gauss linearUpwindV grad(U);
div(phi,U)      Gauss LUST grad(U);
div(phi,U)      Gauss LUST unlimitedGrad(U);
div(phi,U)      Gauss skewCorrected linear;
"div\(phi.*,U.*\)" Gauss upwind;
div(phi,U)      Gauss upwind;
div(phi,U)      Gauss vanLeerV;

Question

Factory files on a brand-new Samsung SSD 860 evo 500G are removed. Is it safe to install Windows and Ubuntu on it?

Description

I have bought a brand-new Samsung SSD 860 evo 500GB. First, its volume was around 475GB. During the installation of a fresh ubuntu 20 on it, I had to click on New Partition Table...; this created 500.1GB of free space on the disk. I don't know what factory files have been there on the brand-new SSD before. I also don't know is it safe to install OS on it when these files are removed.

Problem

Accidently, the file x.pdf which was a book with a lot of annotations created by Okular is deleted. Annotations, however, are present in /home/user/.var/app/org.kde.okular/data/okular/docdata/. I have the raw file (annotation-less file) of x.pdf.

Question

How to associate existing annotations with the raw x.pdf?

Problem Details

Actually I didn't delete the file myself; I was reading the book, I added some annotations as usual; when I wanted to save the changes, Okular hanged up; I closed it, then the file was not there in its directory....it got completely disappeared.

Tested Workarounds

I have used testdisk; it doesn't found anything as my partition is NTFS. Therefore I used ntfsundelete which also was unsuccessfull, i.e. it didn't find my deleted file.

When I have no browser opened and no updates, or any other files under downloading, System Monitor still shows non-zero Receiving rate as shown below. Why?

I want to set up my wired ADSL2+ D-Link router. It is simply:

1. Typing 192.168.1.1 in address bar.
2. username and password
3. In Ubuntu what appears is: It needs clicking refresh bottom multiple times for the next window to appear:
4. During set up through Advanced Setup menu, by pushing the botton Next in each step, the error above, namely 400 Bad Request appears multiple times. Again I have to click refresh in order to go to the next step. It may take half an hour to reach the final step which re-starts the modem automatically.
   This all is in obvious contrast with what I experience in Windows 10. In windows, set up can be done easily and cleanly without any 400 Bad Request error.

Question
What exactly the problem is?

OS: Ubuntu 18.04 , Windows 10
Modem: D-Link DSL-2520U

Edit
The output of lspci -knn | grep Net -A3; uname -a is

08:00.0 Network controller [0280]: Ralink corp. RT3090 Wireless 802.11n 1T/1R PCIe [1814:3090]
    Subsystem: AzureWave RT3090 Wireless 802.11n 1T/1R PCIe [1a3b:2041]
    Kernel driver in use: rt2800pci
    Kernel modules: rt2800pci
Linux soha 4.15.0-96-generic #97-Ubuntu SMP Wed Apr 1 03:25:46 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

Why did I re-set the router?
Actually, I had no network whereas everything was seemed fine; I mean, when I was trying to go to a web page, this was appeared in that tab:

The gray circle which rotates counter clockwise for up to 3 minutes; Then it depended on chance; the page might finally open or not. I called to the provider and they said "we see no problem in our side"; The modem also showed no indication of a problem; DSL and internet lights were ON. As I saw no solution, I re-set the modem.

I want to start a big simulation on an ubuntu desktop computer. I have physical (not remote) access to this PC. This simulation may take some weeks. The command to start the process is:

mpirun -np 100 icoFoam -parallel | tee log

Where icoFoam is the executable and -parallel is needed as its option.
This command prints data in terminal. Some times the terminal is closed or the OS is logged-out randomly during long simulations and due to this, the process terminates. I tried to figure it out by a couple of alternative commands:

nohup mpirun -np 100 icoFoam -parallel > log  & 
nohup mpirun -np 100 icoFoam -parallel > log  & disown & 
nohup mpirun -np 100 icoFoam -parallel | tee log & disown & 
nohup mpirun -np 100 icoFoam -parallel | tee log & disown & > /dev/null 2>& 1 & nohup mpirun -np 100 icoFoam -parallel > /dev/null 2>& 1  &
systemd-run --scope --user mpirun -np 100 icoFoam -parallel | tee log &
systemd-run --scope --user mpirun -np 100 icoFoam -parallel | tee log & disown &
systemd-run --scope --user nohup mpirun -np 100 icoFoam -parallel | tee log & disown &
tmux

Results
Except form tmux, using any one of these commands, the process is terminated when I close the terminal.
tmux is also terminated when I log out from my user account.

My Findings

1. As the simplest workaround, I mixed nohup and disown ( from here ).
2. I guessed that commands including tee, are terminated because of SIGPIPE caused by closing the terminal (from here). Therefore I used redirection to a log file or /dev/null (from here), both of which were also terminated by closing the terminal.
3. I also examined systemd-run. But it also is terminated by closing the terminal.

4. To see whether the program has installed its own handler, I executed this:

   nohup mpirun -np 100 icoFoam -parallel > log  &
   grep Sig /proc/$!/status
   

   Which returns

   SigIgn: 0000000000000000
   

   Therefore, I guess this is the case, i.e. mpirun has installed its own handler overriding the protection of nohup (from here).

5. I don't know if it is possible to send a custom handler to mpirun in order not to override nohup.

My Question
I want to execute the following command such that it prints output in the terminal as long as the terminal is not closed, and also the process is not terminated by closing the terminal or logging out from the user account.

mpirun -np 100 icoFoam -parallel

OS: Ubuntu 18.04
Executable: OpenFOAM
mpirun (Open MPI): 2.1.1

Update
By log out, I mean pressing log out button (image), not lock-screen (super+L)

Thank you in advance.

Recently, my freecad encountered with a strange problem of being transparent. When I open it, there is no problem (image). But when I select to go to a specific workplace, say part, the window gets transparent, so that my desktop is visible on freecad backside(This is my desktop and this is freecad window).
I have removed and re-installed it but the problem persists. I also have to mention it is not a matter of opacity that can be controlled from teminal by something like: sh -c 'xprop...

I have this in odt:

When exporting as pdf from libre writer, I end up with:

As you can see, the parts that I put them using insert -> formula, disappears partially. Why?