2

So I know I can make a persistent LiveUSB whereby there would be anywhere up to 4GB (I think that's the max) of persistent storage for downloads, etc.

I am asking the opposite, in a sense. I'd like to configure a USB install to have the platform adaptability that a Live OS offers while fully utilizing the 120GB of space I have.

In essence I'm hoping to have a boot up install that reconfigures most/all the hardware/drivers as necessary every boot as I'd like to be able to boot off of it on nearly any machine. (Within reason - they will all be 64-bit)

The biggest gripe with doing multi-platform booting is the video driver stuff. Sometimes the system I'm booting off of is AMD, sometimes Nvidia, sometimes Intel.

Alternatively, a usable answer may be a way to better configure the LiveUSB setup for more storage utilization and customization.

3

No problem whatsoever! (I've got a USB disk just like that but I've never tried anything but BIOS machines, as I rarely encounter UEFI machines and if I meet one, I put them in BIOS mode and revert back when I leave)

Procedure is exceedingly simple:

  1. Buy a decent USB 3.0 SLC USB disk. These are normally advertised as 200-300 Mbps USB 3.0 disks, but your mileage may vary. Read the specs

    Why? SLC is vastly superior in speed to MLC or TLC drives and lasts about 4-12 times longer. This outweighs the cost of these things... (2-3 times as expensive as other "fast" USB disks, 3-4 times as expensive as a low-end one)

  2. Use Lubuntu (in your case: 64-bit)

    Why? Lubuntu is the most compatible of all of the Ubuntu family and you're not going to use this as a high-end server, so Lubuntu will be snazzy even on a 1GB USB 2.0 machine. I use the 32-bit version with PAE extensions forced as I run this thing on a variety of hardware (mainly to resurrect Windows machines, but I've been told already to wipe the F|@#§g Windows and install this nifty, fast, free OS!)

  3. Install like you would install any other machine, but treat the SLC as a simple hard disk and install grub, swap, / and /home.

  4. Optimise fstab as you would for an SSD drive

    Why 3+4? Obviously ;-) you basically have an SSD on a stick!

  5. Set the sysctl.conf parameters as follows:

    # Prevent USB wear out due to excessive swap usage.
    # Only start swapping when the memory is 90% full
    vm.swappiness = 10
    
    # This percentage value controls the tendency of the kernel to reclaim
    # the memory which is used for caching of directory and inode objects.
    #
    # At the default value of vfs_cache_pressure=100 the kernel will attempt to
    # reclaim dentries and inodes at a "fair" rate with respect to pagecache and
    # swapcache reclaim.  Decreasing vfs_cache_pressure causes the kernel to prefer
    # to retain dentry and inode caches.
    #
    # Basically, once something is swapped it's probably not immediately needed
    # any more, so increase the kernel's resistance a bit more trying to build up
    # a large cache again.
    vm.vfs_cache_pressure = 75
    
    # Good to improve sequential reads (stop stuttering background music)
    # Can also be implemented per disk using udev rules
    # in KB, so only 3MB lost, so who cares nowadays?
    vm.max-readahead=2048
    vm.min-readahead=1024
    

    Why? Read the comments above...

  6. Install as many command-line tools as you want, but stay away from huge memory-hungry programs as you won't know what kind of machine you'll be running this on. (OK: I confess: I've got LibreOffice running, but that's about it. Nu MySQL, no GIMP, no 3D-rendering, ...)

  7. Stay away from any proprietary modules (aka drivers), just standard Linux kernel modules... And these are extremely good at adapting to their environment! They're like mongrels: they'll eat anything, drink anything and ... well, whatever. ;-) It just works!

That's it!

  • Don't thank me! ;-) If you like my answer, just click the little grey under the "0" now turning it into beautiful green. If you do not like my answer, click on the little grey down-arrow below the 0, and if you really like my answer, click on the little grey checkmark and the little up-arrow... If you have any further questions, go to askubuntu.com/questions/ask – Fabby Mar 28 '15 at 14:42
  • What part of this gives me boot up adapting? My main concern is video driver compatibility. When I boot up a live os it basically creates a fresh environment with regard to input devices and video drivers. That's what I'm trying to obtain. – Enigma Mar 28 '15 at 15:38
  • 2
    You do that by avoiding it altogether: no AMD modules, no NVidia modules, just kernel modules... And these are extremely good at adapting to their environment! They're like mongrels: they'll eat anything, drink anything and ... well, whatever. ;-) It just works! As long as you stay away from anything proprietary – Fabby Mar 28 '15 at 22:46
  • Unfortunately for my needs (steam/games/3d), I need the proprietary drivers. – Enigma Sep 3 '15 at 18:16
  • Then you sacrifice portability: you'll need one USB stick per computer; or one boot partition per computer, but that would be an entirely new question – Fabby Sep 3 '15 at 19:25

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