How do I burn a bootable ISO in Ubuntu?

I've Googled for help but it seemed all confusing. Don't ask me what I was confused about, just tell me from the beginning...

How do I burn a bootable ISO in Ubuntu? I've been using Ubuntu for three or so weeks now since I ditched Windows. I'm familiar with most things but new at others, so don't be hard on me..
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how about:
 how to burn iso on any linux distro? :-)

hope this helps

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cdrecord comes on every ubuntu distro, and can burn .iso images. ubuntu is a cd image, so you only need a cd burner.

Run this command on your image (image.iso) with your burner (/dev/cdrom):

cdrecord dev=/dev/cdrom driveropts=burnfree -v -data image.iso

If the device should fail: try cdwriter, cdrom1... look around in /dev to find a good match for your burner.
ibu1Senior System AdministratorCommented:
Step by Step
1) To find out which scsi device is the cd drive is using,do this
# cdrecord -scanbus
This will give u the output similar to this
Cdrecord 2.0 (i686-pc-linux-gnu) Copyright (C) 1995-2002 Jörg Schilling
Linux sg driver version: 3.1.25
Using libscg version 'schily-0.7'
cdrecord: Warning: using inofficial libscg transport code version (schily - Red Hat-scsi-linux-sg.c-1.75-RH '@(#)scsi-linux-sg.c        1.75 02/10/21 Copyright 1997 J. Schilling').
        2,0,0   200) 'HL-DT-ST' 'DVD-RAM GSA-H20N' '1.01' Removable CD-ROM
        2,1,0   201) *
        2,2,0   202) *
        2,3,0   203) *
        2,4,0   204) *
        2,5,0   205) *
        2,6,0   206) *
        2,7,0   207) *
                  Here is identify the device as 2,0,0.May be at ur side it will be like 0,0,0

2) Suppose u want to make the image of /home/mary, do this
mkisofs -o /var/tmp/mary.iso /home/mary
            /var/tmp/mary.iso is the location of the image.Adjust it as per your requirement.

3) Now burn the image
# cdrecord -v speed=2 dev=0,0,0 -data /var/tmp/mary.iso

                  You can adjust speed as per your need.
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