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2
votes
1answer
46 views

User mode linux eth0 connected to host tap ethernet device not coming up

I am trying to setup the network between UML instance running on ubuntu as host. UML--eth0-(192.168.0.254) ----------------tap0--(192.168.0.253)--VM But, I am not able to bring the eth0 device in ...
1
vote
0answers
34 views

apt-get failed to fork in UML (user mode Linux)

I'm running a user mode Linux (Linux-3.19.8) for development testing. I'd like to be able to edit files inside the UML. I have some experience with Vim, so I'd prefer that. But unfortunately when I ...
0
votes
0answers
42 views

Virtual serial ports /dev/pts

I'm trying to create virtual ports using GSM cmux. It creates virtual ports in /dev/chn 1 2 & 3. Which is linked to /dev/pts 0 1 & 2. But when I list dev directory there is no pts folder and ...
0
votes
2answers
43 views

usermod question about option e

after reading the man pages I am unable to find an explanation of what this does (the tack e option) usermod -L -e 1 username -e 1 does this mean one day after the linux epoch, jan 1 1970? How ...
0
votes
0answers
29 views

Create Wheezy UML filesystem

I'm trying to create a Debian Wheezy filesystem to use in User Mode Linux. right now I'm following this tutorial. The commands after # Remove the other terminal events don't work here and I can't find ...
1
vote
0answers
62 views

How to set up networking in UML on Fedora 21 on VirtualBox?

I'm trying to set up an user mode linux machine on my virtual machine with fedora 21, as a part of a school project. I've got it running, but I've no idea how to get the networking to work. edit. ...
13
votes
3answers
1k views

Why would someone want to run UserMode Linux (UML)

The Linux README states that: Linux has also been ported to itself. You can now run the kernel as a userspace application - this is called UserMode Linux (UML). Why would someone want to do ...
3
votes
1answer
2k views

Not able to change default group for user with `sudo usermod -g` [duplicate]

I have looked at the questions and answer here at U&L but I still cannot get my default group to change from a user. [red@ws-red-l ~]$ whoami red [red@ws-red-l ~]$ groups yellow green [red@ws-red-...
4
votes
1answer
2k views

How can a user run a program in kernel mode?

Is it possible for a user to run their own program in kernel mode? How could a user accomplish this? What weakness in the system's protection mechanism would they have to bypass? I'm thinking that a ...
0
votes
1answer
96 views

Configure UML to generate core file

The User Mode Linux (UML) I run on Ubuntu crashes occasionally, but does not generate any core file. I'd like to know the necessary configuration to be applied on UML so it generates a core when it ...
3
votes
1answer
543 views

How to create rootfs for user mode Linux on Fedora 18?

I want to create a rootfs to be used with an UML kernel and be able to use the internet. I was using febootstrap with packages: bash, coreutils, net-tools, iputils. After using febootstrap-supermin-...
4
votes
1answer
283 views

User Mode Linux compile fails

I am trying to compile User Mode Linux on a 64 bit machine with defconfig and getting the following error. arch/x86/um/user-offsets.c:1: sorry, unimplemented: code model "large" not supported yet ...