livecd fs format
by Mr Dash Four
I have been using the LiveCD format extensively on majority of my
machines throughout the years as it brings, among other things, enhanced
protection to my root (/) image (as this is preserved throughout the
life of the session and is restored after each reboot). I have, however,
two fundamental issues I need to clear up:
1. How is the LiveCD file system constructed/built? I've read a variety
of articles and it seems that it is close to the UnionFS (rom+ram
"partitions"), but I am not sure that is used with the new versions of
Linux. I see there are multiple loop mounts on the system, but can't
figure out what they are.
2. My understanding is that all files that are modified in the "live"
image are stored "separately" on a "ram partition". If that is indeed
the case, can I look at what has been "modified" during the live
session? This is easily visible and implemented in UnionFS by a simple
"ls" on the ram (i.e. the read-write) part of the UnionFS, but I am not
sure how this is organised on the LiveCD system.
Any help and advice on the above two issues is appreciated. Thanks!
12 years, 1 month
persistent overlay
by Tim Coote
Hullo
I'm trying to use livecd to test fedora upgrades non-destructively. To make this work, I really need to be able to use the persistent overlay to fix drivers. I'm using the standard command:
livecd-iso-to-disk --overlay-size-mb 2047 /path/to/live.iso /dev/sdb1
However, this is not working as I'd expect. If I boot from the resulting usb drive and change the configuration (eg to enable sshd), then the changes are lost on reboot.
Have I misunderstood how persistent overlays are supposed to work - I'd interpreted the documentation to mean that the overlay can persist changes from /, as well as just providing a persistent overlay to /home?
tia
Tim
12 years, 1 month
Trying to build Fedora 16 remix
by Scott Dowdle
Greetings,
I've been building personal Fedora remixes since Fedora 9. I just started building one based on Fedora 16 yesterday. I have noticed two errors:
1) When it builds, everything goes fine... and then it counts down the percentage of the iso it is finishing up... and then it give an isohybrid error:
isohybrid: /var/tmp/imgcreate-1J2TbZ/out/MontanaLinux-F16-001-i686.iso: seek error - 6: Invalid argument
The .iso does finish and it is bootable... so perhaps that error is inconsequential.
2) When I boot the CD, it works fine... but when I do an install... the install goes fine but at the very end where it is installing the bootloader I get a really long anaconda error:
Attached file (MontanaLinux-F16-001-intsall-bug.txt.gz)
That is a big bug making a non-usable system. That was done in a KVM VM. I used gparted to partition the virtual disk before I ran the installer. It has a msdos partition table. I have not tried the install on physical machine... yet.
I was just curious if anyone has run into these errors.
TYL,
--
Scott Dowdle
704 Church Street
Belgrade, MT 59714
(406)388-0827 [home]
(406)994-3931 [work]
12 years, 1 month
Branch 'f16-branch' - 2 commits - imgcreate/live.py Makefile
by Brian C. Lane
Makefile | 2 +-
imgcreate/live.py | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
New commits:
commit 3ee2882bbe82842a4d6afc63ec3a5ea77c5f9d1d
Author: Brian C. Lane <bcl(a)redhat.com>
Date: Wed Oct 26 06:18:25 2011 -0700
Version 16.8
diff --git a/Makefile b/Makefile
index 477d7c4..c4a49e9 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
-VERSION = 16.7
+VERSION = 16.8
INSTALL = /usr/bin/install -c
INSTALL_PROGRAM = ${INSTALL}
commit 3f5b0c7934d685e16b2e9721cbfdb1392bab9e86
Author: Brian C. Lane <bcl(a)redhat.com>
Date: Wed Oct 26 06:17:52 2011 -0700
Correct patch (#748344)
diff --git a/imgcreate/live.py b/imgcreate/live.py
index 2edd877..11e8c57 100755
--- a/imgcreate/live.py
+++ b/imgcreate/live.py
@@ -700,7 +700,7 @@ hiddenmenu
checkisomd5 = self._has_checkisomd5()
# tell dracut not to ask for LUKS passwords or activate mdraid sets
- if self.isDracut:
+ if self._isDracut:
kern_opts = kernel_options + " rd.luks=0 rd.md=0 rd.dm=0"
else:
kern_opts = kernel_options
12 years, 1 month
Encrypted partition
by Ruch Grégory
Hi !
First of all, I apologize for my bad English level !
I'm trying to build a hardened live system. I want to encrypt the / partition. In my kickstart file I use : part / --size 1024 --encrypted --passphrase=pass1
It doesn't work ... I want to enter the passphrase before the system run ! Logically the system don't be able to boot without passphrase. But actually the system boot without it.
Are there anybody who have ever try to use encrypted partition in a live system ?
I'm new in fedora, if you have suggestion about hardening or if you have ever build a hardened live system, I will be happy to get some information ! :)
Thank you for your reply
Gregory
12 years, 1 month
Changes to 'refs/tags/livecd-tools-16.7'
by Brian C. Lane
Tag 'livecd-tools-16.7' created by Brian C. Lane <bcl(a)redhat.com> at 2011-10-24 17:48 +0000
Tag as livecd-tools-16.7
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Changes since livecd-tools-16.6:
Brian C. Lane (2):
Add dracut args to EFI grub.conf creation (#748344)
Version 16.7
---
Makefile | 2 +-
imgcreate/live.py | 11 ++++++++---
2 files changed, 9 insertions(+), 4 deletions(-)
---
12 years, 1 month
Branch 'f16-branch' - Makefile
by Brian C. Lane
Makefile | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
New commits:
commit 5b2b088f948b4bd5146548de831e3c8b74bb6514
Author: Brian C. Lane <bcl(a)redhat.com>
Date: Mon Oct 24 10:48:12 2011 -0700
Version 16.7
diff --git a/Makefile b/Makefile
index b64ecd7..477d7c4 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
-VERSION = 16.6
+VERSION = 16.7
INSTALL = /usr/bin/install -c
INSTALL_PROGRAM = ${INSTALL}
12 years, 1 month
Branch 'f16-branch' - imgcreate/live.py
by Brian C. Lane
imgcreate/live.py | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)
New commits:
commit b7816d38ec991eedc2cf422d0539f8321775e65b
Author: Brian C. Lane <bcl(a)redhat.com>
Date: Mon Oct 24 09:57:31 2011 -0700
Add dracut args to EFI grub.conf creation (#748344)
diff --git a/imgcreate/live.py b/imgcreate/live.py
index 2aa8ab6..2edd877 100755
--- a/imgcreate/live.py
+++ b/imgcreate/live.py
@@ -699,21 +699,26 @@ hiddenmenu
kernel_options = self._get_kernel_options()
checkisomd5 = self._has_checkisomd5()
- cfg = ""
+ # tell dracut not to ask for LUKS passwords or activate mdraid sets
+ if self.isDracut:
+ kern_opts = kernel_options + " rd.luks=0 rd.md=0 rd.dm=0"
+ else:
+ kern_opts = kernel_options
+ cfg = ""
for index in range(0, 9):
# we don't support xen kernels
if os.path.exists("%s/EFI/boot/xen%d.gz" %(isodir, index)):
continue
cfg += self.__get_efi_image_stanza(fslabel = self.fslabel,
isofstype = "auto",
- liveargs = kernel_options,
+ liveargs = kern_opts,
long = name,
extra = "", index = index)
if checkisomd5:
cfg += self.__get_efi_image_stanza(fslabel = self.fslabel,
isofstype = "auto",
- liveargs = kernel_options,
+ liveargs = kern_opts,
long = "Verify and Boot " + name,
extra = "rd.live.check",
index = index)
12 years, 1 month
how to create Fedora LiveCD with GUI but no Desktop (using WM)
by Globe Trotter
Hello,
How does one build a Fedora LIveCD without a desktop but with a WM and GUI?
I was looking at the fedora-livecd-lxde.ks file and noticed the following:
# create /etc/sysconfig/desktop (needed for installation)
cat > /etc/sysconfig/desktop <<EOF
PREFERRED=/usr/bin/startlxde
DISPLAYMANAGER=/usr/sbin/lxdm
EOF
Also,
# Show harddisk install on the desktop
sed -i -e 's/NoDisplay=true/NoDisplay=false/' /usr/share/applications/liveinst.desktop
mkdir /home/liveuser/Desktop
cp /usr/share/applications/liveinst.desktop /home/liveuser/Desktop
How do I modify at least these parts? I would like to still have the ability to log in as a liveuser, and then install to HDD (for this, I guess I will need anaconda and firstboot).
12 years, 1 month
Can I create x86_64 livecd on 32bit box?
by Tim Coote
In principle, I'd have thought that this was possible, if where binaries need to be run in the creation process the inputs/outputs are compatible between the architectures and the mappings between which binaries to use are properly managed.
however, it doesn't seem to work:
setarch x86_64 livecd-creator -c whatever.ks
simply returns:
setarch: x86_64: Unrecognized architecture
I'm using f15, util-linux-2.19.1-1.4.fc15.i686 (for setarch). livecd-tools-15.7-1.fc15.i686
(I'm assuming that using setarch is the right approach to use, otherwise, livecd-creator just builds for the architecture that it's run on .
Tim
12 years, 1 month
