Ubuntu Installation :: Create Larger Then 4GB Casper File?
Nov 23, 2010
I have recently been experimenting with installing Ubuntu 10.10 on a USB/Flash drive, and have finally stumbled on the "Universal USB Installer", using a so-called "Casper" file for persistence.Now I wanted to make the Casper file bigger, and found this article:I was reading it, and got confused at this part:"This tutorial assumes that you have already created a bootable USB Flash Drive that contains Ubuntu or an Ubuntu based Live Distro like Xubuntu, Kubuntu, Linux Mint, Crunchbang, etc. You should delete any existing casper-rw file from the drive to free up all available space before proceeding.
1. Restart your Computer, booting from an Ubuntu Live CD"Do they mean that you have to make 1 flash drive that was created with the Universal USB Installer, and has a Casper file on it, AND you have a Live CD from which you operate?If so, could I use one flash drive that acts like a Live CD (without the Casper file), and create another flash drive that DOES have the Casper file, and then boot from the one without, and follow the instructions? (Sorry for the complex sentence, didn't know how other to put it...)
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May 3, 2011
Using Samba I have looked into the file that stores all my web sites, there were a few strange files that get larger and larger all the time. File names are _Za01716 and _Za01820, they are nearly 50mb in size now. I know these are not Log files so what are they and can I delete them?
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Feb 16, 2011
I have a ubuntu 10.10 server with apaceh2 and php and I want to open a file larger than 2gigs
I've read there is a flag that needs to be compiled into php to do this ?
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Mar 12, 2011
I have noticed the (understandable) tendency of new Linux users to think about disk drives in the 'Windows way'; their first thought is to exchange a new drive for an existing one, rather than combine both drives for a larger 'file system'.
There are times when replacing one drive with another is indeed the correct action (aging drive, failing drive, slow drive, etc). But in other cases it may be preferable to use the inherent strength of the fstab (file system table) file to combine physical drives to become a larger 'file system'.
Lets first look at a user with an 8 gig netbook who is running out of space. Rather than replace the 8 gig flash drive with a 32 gig device, the old and new devices can be combined to yield a 40 gig 'file system':
This same principle can be applied to a user with a computer using an 80 gig hard drive, and who 'adds' a new 320 gig drive instead of replacing the 80 gig drive with the 320 gig drive:
This same principle can also be applied to building a massive 'file system' without the requirement of using RAID:
The above 12 terabyte system can be built using a basic motherboard with four open SATA ports and four 3tb hard drives. No server based equipment is needed; no raid hardware or software is required. This is just something that Linux does (and does very well).
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Oct 25, 2010
I am trying to make a usb installed ubuntu(with persistent) unchangeable. The usb needs to use the data from the persistent casper-rw, but in the same time not be able to change the casper-rw. I have tried installing ubuntu on a SD-card, and then simply lock the SD-card. So fine so good, but it just wont bootup then - it says "Aufs mount failed".
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Feb 21, 2011
I've made myself a multiboot usb drive and looking to add ubuntu to it. I've created a live system and its respective casper drive, made the changes I want to it and now looking to make the whole system boot to ram including the casper drive so I can use the same usb drive in multiple machines instead of having to have multiple usb pens.
I've added the toram option in the txt.cfg file but only the operating system (filesystem.squashfs) goes into ram so when I take the usb out, the files on the casper drive are lost.
Could you tell me either how to boot the casper drive to ram or how to combine or merge the filesystem.squash and the casper-rw drive.
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May 25, 2011
I'm using an acer aspire one netbook and attempting to install ubuntu 11.04 on it using flash drive. I extracted the installer using the universal usb installer. Anyway as soon as I get to the ubuntu installer screen it won't let the installer begin and says this: "could not find kernel img:/casper/vmlinuz. I have tried many things including typing in this:"vmlinuz initrd.img" and extracting the data to the flash drive again but nothing has worked.
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Aug 18, 2011
I've just created a bootdisk (ssd) with multiples Squasfs images I can choose to boot at the Grub2 menu.No I tried to put the sqfs-images into a ramdisk. Therefore I edited the script '/usr/share/initramfstools/ scripts/ casper'. I used the 'dirty hacks'in the ubuntuforums.org/boottoram howto but I suited them for my needs.Now the Systems stops after the kernel and doesn't find a root system.
The sqfs-image without the modification of the 'casper'-script still boots but doesn't load into ram completely.
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May 7, 2011
I have had a dual boot on my system since first trying Ubuntu a few months ago.I had a few problems when i upgraded to 11.04 (mainly due to the new desktop Unity), but after some great help here, we had the old desktop running again.I have Windows running on my spare Computer in case i should need it for any reason, though can not think of one lol Now i am used to Ubuntu (from the using side, get lost in terminal etc so here i come if i need help) i decided i would totally commit my main computer to Ubuntu.I downloaded the latest iso from the Ubuntu site, and burnt it to CD, inserted in my main computer & rebooted. It goes past the first purple ubuntu page (hit a key to choose language & also get a selection Menu) then goes to black screen and i get:
BusyBox v1.17.1 (ubuntu 1:1.17.1-10ubuntu1) built-in shell (ash)Enter 'help' for a list of built-in commands.(initramfs) mount: mounting /dev/loop0 on //silesystem.squashfs failed: Input/output errorCan not mount /dev/loop0 (/cdrom/casper/filesystem.squashfs) on //filesystem.squashfs(hope i typed that i correctly)I have burnt the iso image numerous times, using different disks, speed (from x4 - x52) and burning programs
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Apr 27, 2011
I have considered a range of choices, but at the end of the day the choice I make can quite easily put into a situation that requires even more thinking.
The idea is to have an enormous file system for SAMBA that can scale from terabytes to petabytes. Such as a single directory with say 4 million MP3s in my iTunes collection. iTunes cannot use multiple drives easily.
There are lots of vendors that have offerings galore, I wanted to see what can be done with a roll your own approach.
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Jul 14, 2011
i am using the following command to backup and sql file:
tar -zcvf "$BACKUP_DST/$FILE_NAME.tgz" "$BACKUP_DST/$FILE_NAME.sql"
i want to make sure the compressed file wont be larger then 300mb, if it exceeds 300mb, split it into several files.
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Aug 2, 2010
I am using Ubuntu and looking for a good editor to edit a file that is > 4GB. I just need to put content at the end and beginning of the file. I suppose I could use something like
cat "text to add" >> huge_file
To append to the file. Is that the route to go? What about prepending? In general, what is the best route if I wanted to edit somewhere in the middle?
I've tried VIM and it fails miserably. I assume emacs and nano would be even worse. What else is there? I assume to accomplish what I am looking for, the editor would have to be specifically designed for this by not keeping the entirety of the file's contents in memory.
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Jun 8, 2010
i can just swap my old one out for a larger one?
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Mar 16, 2010
I have read that if /tmp is too small, videos choke, and other problems occur.
On my machine, one of the problems was that I couldn't download things because /tmp got full and when I went in to delete some tmp files, I wrecked the system...(not too intuitive I guess).
So this time around, how can I increase the size of /tmp, as well as have it emptied on startup?
I don't want to have it emptied on shutdown, because if I get a crash, the /tmp will still be full...shutdown just doesn't seem to be a reliable place to put essential housekeeping tasks.
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Feb 7, 2011
Trying to install 10.04.1 Kubuntu desktop to Toshiba T110 laptop running Win 7, 4 Gig Ram, 32 bit o/s. Downloaded iso from Ubuntu web site and burnt DVD. No matter what I do I get the error message "cannot mount /dev/lop0 (/cdrom/casper/filesystem. squashfs" etc. Searched by Google and this forum, tried various remedies Unebootin; USB drive boot up etc etc; still get same message. Is there a workaround for what seems to be a fairly common install problem?
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Sep 27, 2010
how to migrate my whole server to larger hard drives (i.e. I'd like to replace my four 1TB's with four 2TB's, for a new total of 4TB instead of 2TB)... I'll post the output from everything (relevant) that I can think of in code tags below.
I'd like to end up with much larger /home and /public partitions. When I first set up raid and then LVM it seemed like it wouldn't be too hard once this day arrived, but I've had little luck finding help online for upgrades and resizing versus simply rebuilding from a failure. Specifically, I figure I have to mirror the data over to the new drives one at a time, but I can't figure out how to build the raid partitions on the new disks in order to have more space (yet mirror with the old drive that has a smaller partition)... don't the raid partitions have to be the same size to mirror?
Ubuntu Server (karmic) 2.6.31-22-server #65-Ubuntu SMP; fully updated
Code:
cat /proc/mdstat
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
md5 : active raid1 sdd5[1] sdc5[0]
968952320 blocks [2/2] [UU]
[Code].....
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Jul 24, 2010
When I am doing a fresh install and it tries to create partition i get this error:
Failed to Create a file system The ext4 file system creation in partition #6 of Serial ATA Raid nvidia_cjtiagcb(stripe) failed.
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Jul 27, 2011
I'm trying to use Pinta Image Editor but I cannot find an option to preview the image, in a viewable size, before I work on it.
what to do in this situation? Prefferably it would be nice to view all the pictures as thumbnails.
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Aug 18, 2010
Whenever I tried to do a sudo update-initramfs -u I get the following message. Code:update-initramfs: Generating /boot/initrd.img-2.6.32-24-generic.: 6: Can't open /scripts/casper-functionsI can't seem to find this casper-functions,I can't update my kernel properly.
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Apr 8, 2011
I have downloaded conky but cant make it work. I have so far installed from terminal. But I do not see it in my desktop. Where do I create the rc file?
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May 25, 2011
I recently migrated from ubuntu 10.10 to xubuntu 10.10 on my Dell inspiron 1100. After many tries I "succeed" (with internet) in solving partially the issue related to the video chipset (Intel 82845G Graphics) by using a "vesa" driver in the xorg.conf. Some discussion here mentioned the possibility of deleting ASCI 8086:2562 from a blacklist in usr/bin/compiz but even with ghex editor I could not find any matching string. Hereafter my grub and xorg.conf for those who are interested. I have another issue now. How can I create an iso file of my installed xubuntu. I did download ubuntu 10.10 and created a CD but I migrated after to xubuntu (since most of the files were there) and it would be great to burn a CD of xubuntu.
[Code]...
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Oct 18, 2010
I am using Ubuntu on a memory stick and it is loading Casper.
When loading it ask for the language that you prefer and then loads.
I would like to have be default to english and boot straight into Ubuntu live.
Also posted another issue that I was having to where when it boots, is displays this:
PHP Code:
And hangs for about a minute and them boots.
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Jun 18, 2010
I want to create a file-server with Ubuntu and have two additional hard drives in a RAID 1 setup. Current Hardware: I purchased a RAID controller from [URL]... (Rosewill RC-201). I took an old machine with a 750GB hard drive (installed Ubuntu on this drive). I installed the Rosewill RAID card via PCI port. Connected two 1TB hard drives to the Rosewill raid card. Went into the RAID bios and configured it to RAID 1.
My Problem: When I boot into Ubuntu and go to the hard drive utility (I think that's what its called). I see the RAID controller present with two hard drives configured separately. I format and tried varies partition combination and at the end of the day I see two separate hard drives. Just for giggles, I also tried RAID 0 to see if they would combine the drives.
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Jul 29, 2011
I am trying to put Ubuntu on my USB.
I use the tool here (as recomended by Ubuntu) to put it on my USB. It seems to work well up until it says "Data error in 'casper/filesystem.squashfs'. File is broken".
I tried to install it anyways (I know how to work the BIOS and everything) and the installation just stops with an error message.
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Dec 9, 2010
As I understand it creating an image of a Linux system makes an exact copy of the OS and any user files/configurations/programs etc. What i would love to do is create an image of my work PC and install it at home on my desktop. Can someone briefly explain the process of creating and installing images of Linux systems?
Home OS - windows Want - An image file that can be executed in a virtual machine(VMPlayer or VirtualBox) or booted directly on my home PC.
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Feb 1, 2010
Besides Puppy or DSL, is there a full "regular" Linux distro that is friendly to be installed on a USB flash drive that won't wear it out? I want to be able to upgrade it, not just keep minor persistent changes like the methods outlined in pendrivelinux.com. The loopback file would fill out too much if I actually did a apt-get update, so I want something that installs natively on a USB flash drive with EXT3/EXT4, etc.
However, is there a distro that sends the log to a tmp ram drive, for instance? Something made *not* to wear out a USB drive too fast? I want a truly portable Linux on a UFD, not a semi-attempt that uses casper.
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Sep 25, 2010
I have an apparently stable installation of Xubuntu that I've hand-tweaked in a few ways. I'd like to be able to reinstall this system verbatim on this machine should a disk crash happen, etc.Is there a "standard" method to create an install and/or total-backup CD that would be an instantiation of the currently-installed-and-modified system?
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Mar 15, 2010
I am trying to install mysql 5.1.44..so i downloaded the binary package, i extracted it and then followed the instructions that were in the manual but i keep getting this error when running this command
Code:
scripts/mysql_install_db --basedir=/home/mosty/mysql
the error is
Code:
Installing MySQL system tables...
100315 20:07:27 [Warning] Can't create test file /var/lib/mysql/mosty.lower-test
100315 20:07:27 [Warning] Can't create test file /var/lib/mysql/mosty.lower-test
[code]....
You can try to start the mysqld daemon with:
shell> /home/mosty/mysql/bin/mysqld --skip-grant &
and use the command line tool /home/mosty/mysql/bin/mysql to connect to the mysql database and look at the grant tables:
shell> /home/mosty/mysql/bin/mysql -u root mysql
mysql> show tables
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Oct 28, 2010
When using the gparted option to create a new partition table does this automatically create a new mbr?
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Jul 21, 2010
I plugged in my USb drive into my computer yesterday and tried to delete a folder. I was unable to do so and got the following message
Cannot move file to trash, do you want to delete immediately? The file "my file" cannot be moved to the trash. Show Details Unable to create trashing info file: Read-only file system
So when I click on delete I get another error message:
Error while deleting.
There was an error deleting Case Study Database. Show Details Error removing file: Read-only file system
At this point I can only click on Skip, Skip All, or Cancel.
I have not changed anything on the stick recently so I dont know what is causing the problem.
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