[SOLVED] how to detect archlinux from bash ?

Is there any simple way ho to detect from bash it is currently running on Arch? I frequntly usde both arch and debian and want top set up my .bashrc & .nash_profile to be the same on both systems so I need some way how to make some part conditional for arch or debian only.
Last edited by stabele (2009-10-16 12:50:18)

You could look in /etc/. Debian has some specific files /etc/debian-version, /etc/apt/source.list. Archlinux has /etc/arch-release. Unless you keep the same /etc for both of your distrib, that should do the trick. I am not aware of another way to check which distrib the shell is running on.

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I downloaded archlinux-2010.05-core-i686.iso.
I unmounted the pendrive.
Would i format the pendrive with ext3/ext4 or fat32 or fat16 format?
After that i would do dd if=archlinux-2010.05-core-i686.iso of=/dev/sda
If i use unetbootin, should i format the pendrive with ext3/ext4 or fat32 or fat16 format?
Has anyone used unetbootin to install archlinux from pendrive/usb?

jasonwryan wrote:I'm pretty sure all of your questions are answered on the wiki: http://wiki.archlinux.org/index.php/Ins … lash_drive
I did:
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@jasonwryan
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[SOLVED] how to prevent Xorg from clearing boot messages in scrollback

I have an updated Arch install with MATE and LightDM. LightDM autologin is enabled, so I normally boot directly to my desktop. I like seeing the messages that flash by during boot, so I deleted the word "quiet" from the linux line in my grub.cfg. Because I want all the messages to still be there after flashing by (in case I want to scroll through them later), I followed the advice here https://wiki.archlinux.org/index.php/Di … t_messages and I also increased the scrollback buffer and enabled early KMS start.
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Last edited by bdantas (2014-08-01 14:19:06)

Since the answer to my original question seems to be "it is not possible," I will make this my last post to prevent the thread from going off-topic.
I came up with a simple workaround that (almost) recreates the old /var/boot/log:
1) put "quiet" on grub2's kernel command line so that only* [FAIL] messages show up, so that I don't have to deal with the scrollback buffer
2) create a startup script with the following contents (script or at least the setterm command must run as root because the setterm command needs to be able to read from /dev/vcs1):
#!/bin/bash
# this script will dump the text of tty1 to /var/log/boot, with same formatting as on the screen
export TERM=xterm
setterm -dump 1 -file /var/log/boot
exit 0
* Unfortunately, even in quiet mode grub2 starts printing all the boot status messages to screen once it encounters a [FAIL]. Therefore, if the [FAIL] occurs early enough in the boot process, the beginning of the messages will scroll off the screen and the workaround won't work. I spun off my two questions related to this nuisance into their own threads:
a) How to make grub2 actually only print [FAIL] messages during boot? https://bbs.archlinux.org/viewtopic.php?id=184702
b) How to print the contents of console's scrollback buffer to a file? https://bbs.archlinux.org/viewtopic.php … 9#p1439359
I hope I can figure out how to do one of the above, because then the workaround would be perfect.
Thanks for the help, guys!
Last edited by bdantas (2014-08-15 02:16:38)

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[SOLVED] how to install ArchLinux on a simple software raid 0

I have two 256GB disks and I want them to be in raid 0.
I tried following this tutorial: https://wiki.archlinux.org/index.php/In … AID_or_LVM
but this tutorial has the added complication of LVM and raid 1 which I don't need.
I made 3 partitions on each of the disks:
sda1 - 100MB for /boot
sda2 - 2048MB for swap
sda3 - raid 0 md0
sdb1 - unused
sdb2 - 2048 for swap
sdb3 - raid 0 md0 for /
I can assemble and format the sda1(ext4), sda2(swap), sdb2(swap) md0 (ext4) and install all the packages
I also configured mdadm.conf by Alt F2 at the installer and executing: mdadm --examine --scan > /mnt/etc/mdadm.conf
and added mdadm hook to the HOOKS list in /etc/mkinitcpio.conf (before 'filesystems')
configured the boot with grub outside of the installer as indicated in the tutorial
But when I boot I get:
md0: unknown partition table
Error: Unable to determine the file system of /dev/sda3
please help.
Last edited by 99Percent (2011-06-29 20:21:52)

fyi this is how I finally set up my simple 2 drive raid 0:
1. Create a bootable USB ArchLinux with UNetBootin
2. Boot with the USB
3. # /arch/setup
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4. ALT F2 to another terminal and create the the raid like this:
# modprobe raid0 (not sure if this is actually necessary)
# mdadm --create /dev/md0 --level=0 --raid-devices=2 /dev/sda2 /dev/sdb2
5. go back to the setup screen with CTRL-ALT-F1
6. go to Prepare Hard Drives>Manually configure block devices, filesystems and mountpoints. Add the /boot (ext2) for sda1 swap for sdb1 and desired filesystem for md0 (I chose reiserfs). Ignore the rest of the devices.
7. Select packages. Add the base-devel just in case, but nothing else and install packages
8. ALT F2 again to the terminal and run:
# mdamd --examine --scan > /mnt/etc/mdadm.conf
(this will configure the mdadm.conf to use your raid as created)
9. go back to the setup screen again with CTRL-ALT-F1
10. Select configure system
11. Edit /etc/rc.conf adding: raid0 to MODULES= like this:
MODULES=(raid0)
again not sure if necessary but it works for me
12. Edit /etc/mkinitcpio.conf adding dm_mod to the MODULES= like this:
MODULES="dm_mod"
13. also add to /etc/mkinitcpio.conf HOOKS= mdadm but before filesystems in my case it went like this:
HOOKS="base udev autodetect pata scsi sata mdadm filesystems"
14. I went ahead and uncommented a few mirrors in the mirrorlist file so I wouldn't have to deal with that later (and maybe it helps on the way).
15. Also set a root password. Not sure if it is even necessary but maybe some components require it.
16, Go to configure bootloader and select Grub
17. When asked "Do you have your system installed on software raid? answer Yes
18. When asked to edit the menu.lst file don't edit anything, just exit
19. When asked "Do you want to install grub to the MBR of each harddisk from your boot array? answer Yes
20. You will get "Error: Missing/Invalid root device:" and "GRUB was NOT successfully installed." Ignore those messages.
21. Exit the install
22. remove the USB stick and:
# reboot
23. the boot will fail and you will get a grub> prompt type the following commands:
grub> root (hd0,0)
grub> setup (hd0)
grub> reboot
Thats it!
Last edited by 99Percent (2011-06-28 18:51:59)

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How to Install ArchLinux from harddriver???

I have downloaded iso image files from Internet. I want to install it from hard driver. How to do it? and where are the vmlinuz and initrd files?

I suppose you can do:
mount -o loop /path_to_.iso /mnt/cdrom
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R

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Hi everyone,
I am having a problem with removing color output from yaourt.
In order to get a list of installed packages in kdemod-core, I execute the following:
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Some time ago colored output was usually lost when piping commands. For some reason it is not removed anymore so that I get the following file content:
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Last edited by dcrabs (2009-05-31 10:47:57)

skottish wrote:
dcrabs wrote:Btw. The same options (-Qs ) with pacman search only locally installed packages.
Any ideas?
pacman -Ss searches on-line.
Thanks, but then I don't have the packages that are installed. It is of course much faster and without color but doesn't solve my problem.
Then only thing I could find so far was a statement, that piping through less for example removes color for security reasons. That doesn't seem to be true any more.
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Last edited by zenten (2012-06-13 17:42:45)

I saw your thread title and that it was already solved, so I gave myself a little quiz to see if I knew the answer before reading what you wrote.
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here is the line that calls it
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Last edited by tawan (2010-04-03 23:33:12)

It works if you remove the quotes;
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Last edited by glenn69 (2012-04-26 17:49:01)

glenn69 wrote:I am using SLIM to login to Fluxbox. I should be able to type halt as username from within SLIM to shutdown. Typing halt as username does not shutdown. I have set sudo to allow my user to shutdown, but that doesn't help.
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[solved] How to convert fs from ext2 to ext3 on root partition?

Hello there!
Edit: It seems that the plan works! apparently it worked for alleyoopster also on a mounted fs.
As the title says, I want to convert my fs on / from ext2 to ext3. After some research I think I know what
to do, but want to make sure that I don't mess anything up....
So here is the plan:
boot with an install disc and leave the root partition unmounted (I know that in theory the conversion should
work on a mounted fs, but it feels awkward to me and I want to avoid it....).
Then use the
tune2fs -j /dev/xxx
command (the defaults for the forced checks are ok with me). Then reboot with the CD still in place, but use
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I'm grateful for any input
Last edited by alafanky (2007-11-26 15:41:35)

Have a look at the man for tune2fs and mkinitcpio
man tune2fs
man mkinitcpio
I am looking at doing the same and as far as I can figure out it goes like this, BUT this is not a proven method just what I am thinking of doing, Maybe someone else can correct or add to this or confirm that it will work.
1. Add journal parameter like this:
tune2fs -j /dev/sda1
2. Change the partition type from ext2 to ext3 in /etc/fstab
3. For a standard kernel re-create ramdisk with preset parameters (no good for custom kernel)
mkinitcpio -p kernel26
As the system is mounted it will create the journal inode in the top level, don't delete this, it will get hidden into the filesystem on reboot.
Let me know if you make some progress. I may get brave and try it later.
So in answer, yes pretty much the same but I think you can do it with the fs mounted.
Last edited by alleyoopster (2007-11-26 12:44:29)

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zen_guerrilla wrote:
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URxvt*perl-ext: default,mark-urls
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[SOLVED] how to detect archlinux from bash ?

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