#md5sum file.iso > file.iso.md5

artinya, file.iso akan dibuat MD5nya, dan akan ditulis ke file.iso.md5 pada direktori yang sama.

Untuk membaca file ISO, yaitu mengubah CD/DVD yang ada menjadi isi dari file ISO, dapat menggunakan :

#umount /dev/cdrom

#dd if=/dev/cdrom of=file.iso bs=1024 

Untuk membuat folder tertentu menjadi file ISO, dapat menggunakan :

#mkisofs -r -o file.iso /lokasi_folder/

Pada OS Windows, untuk verifikasi MD5 dapat menggunakan aplikasi gratisan, seperti winmd5sum

Ubuntu's Feisty was so wildly popular that it hammered Canonical servers for 36 hours. Despite the fact that they'd probably anticipated a huge rush. Which means it was bigger than expected.

Worst hit was probably Xubuntu, who have the least priority in arranging mirrors, and their official mirrors list is still not posted.

Download from canonical [http://cdimages.ubuntu.com/xubuntu/releases/feisty/release/ <--server hammered. Wait for 36 more hours.].

Try the ubuntu torrent server [http://torrent.ubuntu.com/xubuntu/releases/feisty/release/ <--server hammered. Wait for 36 more hours.]
[don't ask me why they have a copy of the iso sitting right in the open]

Here's a list of mirrors I believe have Xubuntu Feisty

• http://ftp.cw.net/xubuntu/releases/
• http://ubuntu-cdimage.datahop.it/xubuntu
• http://neacm.fe.up.pt/pub/xubuntu/releases/
• http://ubuntu.ipacct.com/xubuntu/feisty/release/

I'm picking up the Xubuntu alternate install [which is the one to take if your computer has between 64 and 192 mb ram] for Rohit [data limits on broadband], in addition to the Ubuntu "desktop"... both for i386. The difference is that "desktop" = Live CD + install, while "alternate"= install cd only.

Got Ubuntu, can't get Xubuntu but you have only a low RAM 'puter? Worry not!

Here's help.

Got the download but something's not right?

Did it download correctly? Check the MD5 checksum of the downloaded iso!

Ubuntu Checksums

50f3655fbcbdba9746d4b05ad8705b0b *ubuntu-7.04-alternate-amd64.iso
ff0cc7c9ed5157f0ff8c0f2213973f49 *ubuntu-7.04-alternate-i386.iso
a2b159599b69cea51371eee1ec5feda6 *ubuntu-7.04-desktop-amd64.iso
e296e3468358789904097fc8df29609a *ubuntu-7.04-desktop-i386.iso
8a1099f5fa8eaf4ee295bf0087c8b03a *ubuntu-7.04-server-amd64.iso
cf462501e2dc1b82b96dfc497a0404a2 *ubuntu-7.04-server-i386.iso
e016f1e3322848af98d01eae2688568c *ubuntu-7.04-server-sparc.iso

And also

Xubuntu Checksums

9a4b514d30822d00c99b4c843045666d *xubuntu-7.04-alternate-amd64.iso
d38e78d8a8b6e8e43ded19cdaa2d0361 *xubuntu-7.04-alternate-i386.iso
94fa51d66ef22a012b24da1de7315431 *xubuntu-7.04-desktop-amd64.iso
b10ccf0ea43fc551ad1af27e6666eae4 *xubuntu-7.04-desktop-i386.iso

Checksum - the result of a pre-defined series of mathematical operations on the bitstream or the bytestream that comprises a file or a message.

MD5 - a very famous algorithm for calculating checksums.

You'll need to find a utility for your own OS to calculate the checksum of the iso file.

I use Johny Mattsson's SummerProperties... install it, right click on the file you want to find the checksum of, you'll find a new tab. There it is. If the "MD5" is "disabled", use "configure" to enable it.

Why I'm hating BSES and Airtel.

Airtel is messing with my torrents. They keep dropping speed and mucking packets up. It may or may not be them, but I don't have anything else to blame for 7 kbps average speeds.

BSES keeps doing some stupid switching thing [the voltage drops abnormally for a fraction of a second I think, but I'll need a very sharp data logger with a voltmeter to be certain... hmm] which my UPS adapts to, but my computer' SMPS gives up and switches off, while the DSL router [on mains] resets and goes into a race-around while "connecting to internet".

All this means that I'll have had spent around 6 hours more for doing this than expected, myhardware [especially the ageing HDDs] will be taking a bad hit, and the downloads might become corrupted.

Edit: My Xubuntu iso shows a different MD5. Let's see what's wrong.

Edit 2: All the mirrors are going below 500 BYTES per sec if I try a redownload.
My checksums are

CRC16: 7077
CRC32: F024E598
MD5: F2739E318AE025E925B9BBF87EAE1114
SHA1: 8AD8C57178A869E81C0BE29F77B83CA0DC0EA742

If anyone else has the same ones (dot dot dot)