Currently I have Ubuntu Linux running on my MacBook Pro. I want to try out OS X again, but keeping Linux for now. Can I install OS X to a USB drive without touching my internal storage?
Your external drive needs a GUID partition with at least 8 GB of available space to install OS X. For best results, the volume should be formatted as Mac OS X Extended format (not FAT, NTFS, or EXFAT).
Attach a USB, FireWire, or Thunderbolt storage device to your computer, or insert an SDHC or SDXC card into the SD card slot if your Mac has one:
Set up a gpt partition table
Restart up your Mac. Immediately after you hear the startup sound, press and hold the Command+R on your keyboard.
After you see an Apple logo or globe appear, you can release the keys. If you're prompted to select a Wi-Fi network, select a network that has a working Internet connection.
When the Recovery screen appears, make sure you're connected to the Internet. If not, select a Wi-Fi network with a working Internet connection from the Wi-Fi menu.
Select the option to Install OS X from the Recovery window.
Follow the onscreen instructions to complete the installation. When you're asked to select a drive for installation, click the button "Show All Drives". Be sure you select the external storage device you've connected for this purpose, not your computer's built-in startup drive.
References:
apple support
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so I have a lenovo laptop i7 with two hard drives. My ssd which boots windows on UEFI, and my second a hybrid hard drive. I created two partitions on my second hard drive. One for storage for my windows drive, and the other(500gb), where I would like to install FreeBSD. I made the two partitions in windows, and burned the FreeBSD memstick file onto a usb and booted. When I get to the installation menu, it does not show all my disks under manual installation. It only shows my USB as a partition, which is 8gb. If I try to do the guided installation and select from partitions. I get an error that says out of index 5.
Any Ideas why this is occurring?
As a beginner with Virtual Machines and Linux I have my trouble understanding how to properly upgrade Linux on the Tegra - Board. I found some good explanations but they all were too advanced for a beginner - a student - and not a professional in the field.
Therefore, I would like to know how to properly upgrade the Linux Version on the Tegra X1 Board with a Windows machine
Step1:
Make sure you have the following items:
The Tegra Board
Admin priviliges on the Windows machine (needed once)
Micro USB-B to USB Cable
HDMI Cable and Monitor
These are all the things needed before.
Step 2
Download Linux 14.04 - it is the only distribution compatible with the Tegra Board at the moment.
http://releases.ubuntu.com/14.04/ubuntu-14.04.4-desktop-amd64.iso
Step 3
Download and install Oracle Virtual Machine. You will need admin privilages for install.
http://download.virtualbox.org/virtualbox/5.1.8/VirtualBox-5.1.8-111374-Win.exe
Step 4
Set up an NVIDIA Developer Account
https://developer.nvidia.com/group/node/873376/subscribe/og_user_node?downloadable_file=874988
Step 5
Set up the virtual machine. To do so start the installed Oracle VM Virtual Box (see Step 3). On the upper left you find the button "new". After clicking on it a window will pop up. At the bottom you can change to "Expert-Mode".
In the field "Name" you can give it a fitting phrase like "Ubuntu for Tegra" etc.. The next field Typ should be obiously Linux, and the Version 64 bit.
Set the memory size to a good fitting size, depending on how much RAM you got on your machine. It works fine with 6 GB, anything smaller could lead to some lagging, but will still run.
Put the radio button in the middle so it will create a hard drive.
Go to the next step by hitting "Create"
Step 6
In this window two inputs are interesting. Firstly, it needs a path where to create the virtual environment. So choose a path to a disk that has enough space. Secondly, how many space you give to the environment - 50 gb will work fine.
Step 7
Launch it by selecting the newly created environemt and then hitting "Start". You will be asked to choose a medium to be booted. Here select the downloaded .iso file from step 2.
Step 8
You will be greeted with the Linux-Install environemnt. You can choose between "Try" and "Install". You must choose "Install".
Step 9
After you instaleld Linux you must restart the Virtual Machine. To do so, you can either do it by "normaly" shutting down Linux via the GUI or the command Line tool or from the VM-Software directly by right-clicking on the running virtual machine - close - power down.
Step 10
You may encounter the problem that you do not see the full screen of the Linux environment. To fix this you need to restart the virtual machine. On the virtual machine display at the top bar you can see the entry "devices". If you click on it a drop down menu will open, the last point is "guest additions", click on it and install them. After that reboot the virtual machine.
Step 11
On the virtual machine log in on your NVIDIA Account and download the latest Jetpack Version.
https://developer.nvidia.com/embedded/downloads?#?dn=jetpack-for-l4t-2-3
https://developer.nvidia.com/embedded/jetpack
Step 12
After downloading a file with the extension .run should be in your Downloads-Folder. This is the installation file needed, but it is not executable yet. To make it executable open a shell (right click on the upper left ubuntu symbol, search for terminal and open it).
Go to the Downloads folder with:
cd ~/Downloads
and make the run file executable:
sudo chmod u+x *.run
Step 12
Run the .run file with
sudo *./run
Step 12
In the installer choose the board and the software you want to be installed, also agree the software license agreements. After some downloading time the installer will open a terminal.
If the prompt asks you about Network Layout. If it does, choose eth0 if you have you board connected via ethernet cable, if it is connected via Wi-fi choose wlan0.
Step 13
You need to put the Tegra Board in recovery mode. Make sure that all your data is saved, since it will wipe everything clean.
Follow the instructions on the terminal to put the Tegra Board in recovery mode. If directions unclear follow this youtube video (which also includes some followign steps):
https://youtu.be/4JUWS9i_FCQ
Step 14
When you think the Tegra is in recovery mode check by doing the following: At the virtual machine, on the top bar go the "devices" and then to USB. Select the NVIDIA entry. If it is not there, the board is not in recovery mode. Make sure that this was really selected. (It is highlighted blue when selected)
Step 15
Back in the Linux virtual machine enter lsusb on a second terminal. If there is an entry with NVIDIA Corp the tegra board was successfully put into recovery mode. Press enter, now the flashing starts - this will take some time
Step 16
After flashing finishes, the jetson board will auomatically boot. Connect it to an HDMI Cable and Monitor. If a login is asked, the username and password are ubuntu.
Step 17
Connect to the Internet
Either connect it to the ethernet or a Wifi - depending on what you have chosen at step 12. You may need to disable Wifi to connect via ethernet cable.
Step 18
If you use static IPs you can skip this part since you already now the IP-Adress you gave to the tegra board. If not you have to run
ifconfig
in a terminal. It will show you your adapters and what IP-Adresses they have, note the one that you chose.
Step 19
The Post Installation in the virtual machine either has given up and was unable to determine the IP adress of the Jetson Developer Kit or has found it. If it has not found it give it manually the ip adress you found out by entering "2". After this a GUI is shown where you can enter the Ip-Adress and the username password combo, which is ubuntu.
Step 20
After hitting Next the installation will continue.
I want to replicate a feature that exists on Windows To Go solution into Ubuntu Linux (https://technet.microsoft.com/en-us/library/jj592680.aspx#wtg_faq_surprise)
If the Windows To Go drive is removed, the computer will freeze and the user will have 60 seconds to reinsert the Windows To Go drive. If the Windows To Go drive is reinserted into the same port it was removed from, Windows will resume at the point where the drive was removed. If the USB drive is not reinserted, or is reinserted into a different port, the host computer will turn off after 60 seconds.
This means: I run Linux on an USB Stick, and I want it to freeze if I accidentally unplug the USB. And if I reconnect it, Linux will detect it and return to work. Can anyone point some directions to perform that?
Thanks in advance!
I am guessing thats going to be more difficult then you think, the linux kernel and other systems need to know to not panic when it happens. Windows is probably set up better for boot drive failure.
I have Dell XPS M1530 Laptop and CPU is Intel Core2 Duo T8300 2.8Ghz. I have set Visualization Technology On in BIOS and install Ubuntu 12.04 on VirtualBox but in /proc/cpuinfo vmx cpu flag doesn't appear. Even in VirtualBox i have enable VT-x option, Am i missing something? I want to install openstack on it but without VT support i can't run nested VM. Please suggest.
EDIT:
I have attached CPU identifying tool screenshot.
If I am reading your question correctly, you have enabled VT-x in the BIOS and VirtualBox is able to utilize it from a Windows host, but it is not presenting VT support through to the guest operating systems?
If that is correct: that is because - to my knowledge - VirtualBox does not support virtualizing VT support for guests. See this ticket for some discussion: https://www.virtualbox.org/ticket/4032
Have you taken a look at this SO question? VirtualBox and vmdk vmx files
For some reason it was closed by SO, but seems to have good information.:
VMDK/VMX are VMWare file formats but you can use it with VirtualBox, just create a new Virtual Machine and when asks for a hard disk choose "Use an existing hard disk" and click on the "button with folder and green arrow image on the combo box right" which opens Virtual Media Manager, it looks like this (you can open it directly pressing CTRL+D on main window or in File > Virtual Media Manager menu)...
And then you can add the VMDK/VMX hard disk image and setup it for your virtual machine :)
I generally hear that LINUX OS can be downloaded on flash, pen drive (floppy disk?) etc. How we can do that?
I have RHEL 5.4 source code - so how can download it into pen drive and how much space is required?
What other functionality I can add apart from the OS - so that when I boot from that storage device I can make use of them?
Can we download Linux OS into micro-controllers also?
I generally hear that LINUX OS can be downloaded on flash, pen drive (floppy disk?) etc. How > we can do that?
If you can't get it to work on your own, you can buy a ready made Linux on a USB drive from
a site like http://www.osdisc.com or http://www.cheapbytes.com
Not all PCs, especially older PCs, can boot from the USB Drive. Even some newer PCs are beginning to ship with security features that can interfere with booting code. When it does work, you have to find out the proper way to boot the USB drive. You might have only a few seconds during reboot to enter the right key, or it will boot Windows (if Windows is installed). The key to get to the BIOS Boot Menu might be delete or escape or F10 or some other key (varies with PC motherboard manufacturer). A message on the screen that flashes by rather quickly might mention keys you can press. Boot to a specific device or changing boot order can also often be found in the BIOS setup.
There is a linux utility called unetbootin that will create a USB drive that will boot linux. It does not create a USB boot drive from a source code distribution, but rather from an ISO file representing a live CD or the live CD itself.
Since large USB drives (e.g. 32GB) are relatively inexpensive, if you want to compare systems or have multiple systems there is a way to have multiple linux and other operating systems on one USB drive and be able to choose which to boot into. See, for instance, http://www.pendrivelinux.com/ which has a wide variety of procedures for making a bootable USB using either windows or Linux to set up the USB and booting a variety of systems.
I have RHEL 5.4 source code - so how can download it into pen drive
and how much space is required?
RHEL 5.4 is a bit old. You need the Live CD, if there was one.
The ISO file can take up 600+MB. You want space left over to use the system. 2GB for the pen drive is OK. Sometimes you can get by with less.
What other functionality I can add apart from the OS - so that when I
boot from that storage device I can make use of them?
Upon boot the operating system will often recognize sound cards, other usb devices, the hard drives, etc. You need to know how to use these things within Linux, and how to enable them if they are not configured. Some Linux distributions have a place to put packages that are to be autoinstalled when a USB pen drive based system initializes. In this way you can "install" software from the distribution archives that are not included on the standard live system, even if you don't have internet access.
Can we download Linux OS into micro-controllers also?
People run it on raspberry pi and such, but the versions of Linux on non-PC hardware that has low memory are often quite tiny compared to a desktop version. They can be tiny enough to be challenging to work with or expand.