Bash in dom0

cordial · May 25, 2023, 4:36pm

sudo bash starts bash in debian and fedora terminals, but not in dom0 terminal. Would like to try Unmans tmpfs RAM disk but can not initiate bash in dom0. What is correct proceedure?

disp6252 · May 25, 2023, 4:43pm

It works for me. What error did you get when you tried to run sudo bash in dom0 terminal?

cordial · May 25, 2023, 4:55pm

It just goes to root@dom0 same as sudo -i

disp6252 · May 25, 2023, 5:00pm

What’s the output of:
echo $0

cordial · May 25, 2023, 5:04pm

bash

disp6252 · May 25, 2023, 5:05pm

So by executing sudo bash you got root in bash. What else did you expect it to do?

cordial · May 25, 2023, 5:07pm

bash-5.2# like the terminals in debian and fedora.

disp6252 · May 25, 2023, 5:10pm

The string before $ or # is just for information about the shell and irrelevant for executed commands.

cordial · May 25, 2023, 5:11pm

and the ```
#!/bin/bash

disp6252 · May 25, 2023, 5:12pm

Can you describe what exactly are you trying to do? What’s the guide that you try to follow?

cordial · May 25, 2023, 5:13pm

github.com

unman/notes/blob/master/Really_Disposable_Qubes.md

## Disposable qubes
In normal use qubes are created on, and changes written to, the disk. There is also extensive logging and signs of the qube are scattered in a number of places.
Sometimes, you want to create a qube which does not leave these traces.  
You can do this relatively simply, by creating a RAM based storage area and using it for a new storage pool.
The qube will persist until the RAM disk is deleted, or the machine is shut down.

A script like this in dom0, will create tmpfs RAM disk, create a new storage pool in that disk, and create a new qube using that pool.  
tmp_qubes.sh:  
```
#!/bin/bash
mkdir /home/user/tmp
sudo mount -t tmpfs -o size=2G new /home/user/tmp/
qvm-pool add -o revisions_to_keep=1 -o dir_path=/home/user/tmp/ newer file 
qvm-create new -P newer -t debian-11  -l purple --property netvm=tor
qvm-run new firefox-esr
```

You can remove the qube, and some of the associated artifacts by script in dom0.  
rmtmp_qube.sh:  
```

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disp6252 · May 25, 2023, 5:17pm

If you want to run the commands manually and not to create the script file in dom0 to run it then you don’t need the #!/bin/bash - it’s just information for shell which interpreter to use to run this script:

cordial · May 25, 2023, 5:22pm

I was trying to create the script but was unable to invoke bash in dom0

disp6252 · May 25, 2023, 5:24pm

But I guess you need to create the script files to use them. You can create the scripts in appvm and then transfer them in dom0:

You can run the script file in dom0 like this:
/path/to/the/script/tmp_qubes.sh
For example:
/home/user/tmp_qubes.sh

disp6252 · May 25, 2023, 5:25pm

You don’t need to invoke bash in dom0 to create the script.
If you still have a problem creating script then describe your steps to do it so I can say what are you doing wrong.

cordial · May 25, 2023, 5:28pm

OK. Thank you. I will try again tomorrow after some sleep.