General :: How To See The Content Of The Initrd Image
Feb 8, 2010
i am using rhel5 and i just wanted to see the contents of the initrd image. I have copied that from /boot/grub and saved in /tmp directory. Then i did the following
#mv initrd-2.6.18-53.el5.img initrd-2.6.18-53.el5.img.gz
#gunzip initrd-2.6.18-53.el5.img.gz
#mount -o loop initrd-2.6.18-53.el5.img /mnt
when i gave that, it says "mount: you must specify the filesystem type" Then i included "-t ext2" option in the mount command. Now it says,
mount: wrong fs type, bad option, bad superblock on /dev/loop0,
missing codepage or other error
In some cases useful info is found in syslog - try
dmesg | tail or so
Then i created a ext2 filesystem and did the same thing. But there is no difference.
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Aug 13, 2010
i need to create new initrd image in sles10.2
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Feb 14, 2011
i am using linux for couple of years. suddenly i a question arises in my mind. Before loading kernel during booting linux box initrd image loads necessary real mount point, file system, modules etc. but how initrd loads them ?? is there predefined modules list stored in initrd image or something else....what is the background procedure of it
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May 11, 2011
When we boot the kernel before loding the main file system it loads the temp file system through initrd how that initrd image works.
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Jan 26, 2011
how to create an initrd image using cpio, instead of mkfs?
Now im doing it like this:
Code:
dd if=/dev/zero of=initrd bs=1024 count=10000
mkfs -t ext2 -F -m 0 -b 1024 -i 1024 initrd
But i would like to move to cpio, because with dd, if you add something new, you might need to change the count. Also cpio is used in distro's like Fedora and Ubuntu.
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Jul 1, 2011
Im trying to build an initrd image for my livecd using cpio -o -H newc, but the livecd can't boot. If I create the initrd image using mkfs.ext2 then it works.
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Sep 20, 2010
I am attempting to run ssmtp from an initrd image to send an e-mail, via Gmail MTA, upon reboot of the machine. I have already successfully installed and configured ssmtp on the running box (in other words, ssmtp successfully runs after completion of the boot cycle). When attempting to mail something via `echo "Test" | ssmtp username@gmail.com`, I receive the following error message:
[Code]...
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Nov 21, 2010
I tried compiling linux kernel 2.6.37-rc2 (mainline), Compilation and installation of kernel and modules went fine. After that while trying to make initrd image, I used the following command :-
mohitdhingras@mohitdhingras-laptop:~$ sudo mkinitramfs -o initrd.img-2.6.37-rc2 2.6.37-rc2
It is showing warnings like :-
W: Possible missing firmware /lib/firmware/2.6.37-rc2/radeon/RV610_me.bin for module radeon
W: Possible missing firmware /lib/firmware/2.6.37-rc2/radeon/RV610_pfp.bin for module radeon
W: Possible missing firmware /lib/firmware/2.6.37-rc2/radeon/R600_me.bin for module radeon
W: Possible missing firmware /lib/firmware/2.6.37-rc2/radeon/R600_pfp.bin for module radeon
Actually, "2.6.37-rc2" folder is missing in "firmware".
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Jul 16, 2009
I install fedora on my usb-hdd. Sometimes i boot it from real machine, sometimes i boot from virtual machine (kvm). When I boot from real machine, hdd driver is usb-storage, when i boot from virtual machine hdd drivers are ata_generic and pata_acpi.
Everytime i update kernel, mkinitrd only create initrd image contains only hdd driver current running, and I must recreate initrd manual with all preload hdd driver. How to config fedora to everytime update kernel, mkinitrd can make initrd image with all hdd driver I need?
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Jan 2, 2011
A friend has sent me an .iso by ftp, only trouble is it is 7gb and all my blanks are 4.7gb
Any simple suggestions, I am totally inexperienced working with DVD's so not sure how to re-size without ruining the content!
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Oct 5, 2010
I am using find to search for .tgz files modified more than 7 days ago and delete them.find /directory/ -iname backup*.tgz -daystart -mtime +7 -exec rm -rf {} My problem is that find will go through the content of tarball as well and list all content. I want to only search main tarball and delete it if older than 7 days.
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May 18, 2010
When I compile a custom kernel with this command: make-kpkg --initrd kernel_image kernel_headers and then install the .deb, there's no initrd in /boot and I have to create it manually. I've thought that the --initrd option should take care about this, but somehow it doesn't.
It behaves like this for about two years at least (since I've compiled my first kernel). Of course, it's no big deal to create it manually, I was just wondering whether do I do anything wrong or whether should I fill a bug report..
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Apr 12, 2011
If you have the value 100 in File1 and the value 5 in File2, how do you write a script to divide the 100 in File1 by the 5 in File2 in Linux Bash Shell?The operating system I am using is Ubuntu 10 and object is to write a script to accomplish this task.
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Jul 18, 2011
I have installed "open-SUSE 11.4" on a "500GB Free Agent External Hard Drive". I didn't have any problem in booting since last week that I booted it from my laptop. Also I did it before several times from then when I try to boot it e.g. from an "Intel(R) Core(TM)2 Quad CPU Q9400 @ 2.66GHz" PC the time between loading INITRD and starting boot sequence messages lasts nearly 30 minutes!(i didn't actually measure it but it take a long time in the same order). after starting boot sequence which is showed on monitor everything looks normal. e.g copy of files would be done by speeds between 2MB/s to 30 MB/s depending on the targets.I used to use the external hard derive to boot from different laptops and PC's from start but I didn't have such a problem anytime.
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Apr 17, 2011
I have compiled the linux kernel. My bzImage is 1,14 mb big
Anyway. It's only 2 programs i need and it's Python and Busybox. I have compiled python and busybox and put them together in a folder. Busybox is 146 kb and pyton is 4,4 mb.
But how do i make an initrd file of them? Or should a make an initrd file of them?
I get this error when a runt with a compiled busybox to gz format as initrd, and without initrd.
Quote:
VFS: Cannot open root device "sda1" or unknow-block(0,0)
Please append a correct "root=" boot option; here are the available partions:
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)Pid: 1, comm: swapper Not tainted 2.6.38.3 #1
Do you know how to make an initrd?
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Mar 14, 2011
creation of initrd manually(not using mkinitrd).
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Apr 30, 2010
Why use nash instead of busybox in initrd and initramfs? I'm just looking for pros and cons of both really (and any other applications with similar functionality). I'm currently leaning towards busybox being the better option, why redhat and fedora use nash in their initrd.
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Jul 28, 2010
how to edit/create modules.dep.bin under initrd image. I actually want to insert a new module within the initrd image of suse 11 with sp1.
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Jul 29, 2011
I am having trouble booting off a cdrom using isolinux. I see the isolinux prompt and it seems to boot but I run into:
RAMDISK: incomplete write (-28 != 32768 ) 131072000
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(8,2)
I can't seem to get much debug information either other than the two lines. What do you think I have a problem with?
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Mar 14, 2011
I would like to modify my init.gz and add udp-sender to this image. After copying the program compiled on my system to init image I have error when I try run udp-sender: udp-sender not found When I checked ldd I saw that the some libraries are missing. I copied them from my system but still got the same error. how can I compile program for my init.gz?
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Apr 20, 2011
I run alot of Linux running in memory. Mainly by PXE booting a kernel and the entire OS as the "initrd" file.
I have a RHEL6 image running as a VirtualBox guest and the entire OS (minimal) is contained withing 1GB of disk. I wan't to boot the entire /dev/sda1 "/" (its the only partition on the drive, no swap) as the initrd file and run everything from memory. But grub won't let me. So before I try and re-invent the wheel I thought to post here first.
Details. RHEL 6 as guest in VIrtual BOX. configured with 3Gb memory. HD is single partition and known as /dev/sda1.
at the grub console. I issue
root (hd0,0)
kernel /boot/vmlinuz-2.6.32-19.el6.x86_64 root=/dev/ram0
initrd (hd0,0)
But the grub windows just freezes. Apparently it doesn't like the fact that I've referenced the entire partition (hd0,0) as the initrd. Any thoughts? Or any better boot loader like SYSLINUX?
BTW, I am not worried about the /etc/fstab mentioning /dev/sda1 at this point, I have a fix for that already. I would like to see grub load up the partition as an initrd.
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Dec 14, 2010
After installing numerous stuff on my Slackware system, I notice I am running out of hard-drive space. I see that /tmp/SBo has about 1G of staff that I recently installed --- may I safely delete this staff?
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Nov 10, 2010
i have a file and i want to change the content of file but i also want that md5sum of that file remains same.
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Jul 4, 2011
What to remember when moving content of a file system to another file system ?Is there some kind of procedure for this operation
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Aug 24, 2010
In Iran there is a famous "access denied page" that redirects you to a strange page with a lot of HTML errors and lol, telling you RTFM about ridiculous Internet laws.I want to filter the contents of the page, because the page IP, URL, ... are all unknown.I don't know much about squid configuration scripts.I can read but cannot write
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Sep 21, 2011
How to find file by content on linux by command. Example: i want find file contain word "helo" on my computer (OS: LINUX)
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Jan 13, 2010
I'm developing some small application runs on tomcat 6This web application just query data from MySQLBut I'm concern about performanceHow can I check how many request It can serve as well ?I'm thinking about to change the application to runs on httpd (will write in PHP)Normally, how many request httpd can handle for simple database query ?
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Jul 6, 2011
i had installed alfresco 3.4 server .previously we are working with alfreso version 1 .how i can moved the database content of alfresco 1 version content in alfresco 3.4 content.whether i had to migrate mysql of 3.1 directly to 3.4 alfresco server are else i had to just put the content in alf_data content store and content deleted table alone is enough .
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Jul 20, 2011
We copied the directories/files from one filesys1 to filesys2 and since that initial copy have further added more directories/files to filesys2 from another source. How can we compare filesys1 to filesys2 to make sure all files/directories were copied successfully to filesys2? I would like a way to check filesys1 against filesys2 and only show/output when something is missing from filesys2 that exists in filesys1 and not report the additional/extra directroies/files that have been copied to filesys2.
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Sep 18, 2010
I wish to compare all the files in a directory....comparing is by content. And same files should be printed...
echo "program : $0"
cd $1
for a in *
do
[code]....
This logic did not give the correct result...
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