用优盘安装Ubuntu 10.10

2010-11-07

这两天一直在折腾，给办公室的台式机装系统。因为从一个“莫名其妙”的地方下了个Ubuntu 10.10 DVD版的，所以那个for Windows的USB Universal Installer.exe用不了。为什么说折腾呢，这两天用手头上的工具折腾了好几遍，把优盘格了又格，用UltraISO(Windows)写入光盘镜像，USB-ZIP/ZIP+/HDD/HDD+四个模式都试过了，就是不能正常引导，不光Ubuntu这样，连之前一直保留的Fedora 13镜像都无法正常安装，郁闷之极中还是耐着性子看了官方网站上使用优盘安装的教程，之前一直不愿意看主要是因为嫌太啰嗦，这下可好，耽误功夫不说，到头来还得看人家的官方文档。没办法，先转载一下，再次表示对Ubuntu的尊敬。

这次直接用笔记本操作，因为是Mac，就直接贴上Mac制作Ubuntu USB Stick的教程吧。

We would encourage Mac users to download Ubuntu Desktop Edition by burning a CD for the time being. But if you would prefer to use a USB, please follow the instructions below.

Note: this procedure requires an .img file that you will be required to create from the .iso file you download.

TIP: Drag and Drop a file from Finder to Terminal to ‘paste’ the full path without typing and risking type errors.

Download the desired file
Open the Terminal (in /Applications/Utilities/ or query Terminal in Spotlight)
Convert the .iso file to .img using the convert option of hdiutil
hdiutil convert -format UDRW -o ~/path/to/target.img ~/path/to/ubuntu.iso
Note: OS X tends to put the .dmg ending on the output file automatically.
Run diskutil list to get the current list of devices
Insert your flash media
Run diskutil list again and determine the device node assigned to your flash media (e.g. /dev/disk2)
Run diskutil unmountDisk /dev/diskN (replace N with the disk number from the last command; in the previous example, N would be 2)
Execute sudo dd if=/path/to/downloaded.img of=/dev/rdiskN bs=1m
(replace /path/to/downloaded.img with the path where the image file is located; for example, ./ubuntu.img or ./ubuntu.dmg).
Using /dev/rdisk instead of /dev/disk may be faster.
If you see the error dd: Invalid number '1m', you are using GNU dd. Use the same command but replace bs=1m with bs=1M.
If you see the error dd: /dev/diskN: Resource busy, make sure the disk is not in use. Start the ‘Disk Utility.app’ and unmount (don’t eject) the drive.
Run diskutil eject/dev/diskN and remove your flash media when the command completes