Just got home from work.
First things first: back up my hard drives.
Okay, I've decided to just install Raspbian on my Raspberry Pi 3 micro SD card and I will try to re-partition the hard drive after.
First, I need to format my 32GB micro SD card. To start, I need it's name:
$ mount
/dev/sda1
...
/dev/mmcblk1p1
Before I can format it, I need to unmount it:
$ umount /dev/mmcblk1p1
I first I thought unmount was not installed. But, actually it is umount. Somebody trying to save themselves one keystroke 30 years ago. How convenient.
Now I just need to format it:
$ mkdosfs -I -F32 /dev/mmcblk1p1
(Why, you may ask, did I choose the FAT32 file system? Good question. I have no idea.)
Now I will use the Gnome Disk Utility to check that the formatting worked correctly.
Huzzah!
I got the Raspbian OS from the official download site here.
WHoops. It says the download will take an hour.
Ain't nobody got time for that. Okay, let's read ahead. To install the Raspbian OS, I will follow the offical Linux guide here.
Okay, Raspbian finally downloaded. Yeesh.
I copied the Raspbian disc image over using the command:
sudo dd bs=4M if=2017-07-05-raspbian-jessie.img of=/dev/mmcblk1 conv=fsync
This command takes a few minutes. Note that I had to copy ofer the whole drive name, not just a single partition (mmcbblk1p1).
Success!
Installation was a breeze. Before ejecting the SD card from my laptop, I ran sync from the command line, just to clear ensure the write process was complete and it was safe.
Oh look, I can connect to WIFI because my Raspberry Pi 3 has a WIFI card. Cool.
...Luckily, I only wasted 15 minutes surfing the internet.
Okay, by default the Raspbian OS takes up the entire 32GB of my micro SD card. But I need to add a partition for my LFS build.
Here are a couple guides for re-partitioning the SD card:
First, I will try this with the Linux GUI program gparted, it seems pretty standard. First, install it:
$ sudo apt-get install gparted
Next, run it:
$ gparted
And I see something like this:
Okay, first things first, I want to save off the boot partition on the SD card in case I nuke it (which I think I might have to):
$ sudo cp -r /dev/mmcblk1p1 .
It is at this point I decided I needed to unmount all the paritions on the SD card. But... they are already unmounted. I have no idea how that happened. Or how I could copy from them if they are unmounted.
Spooky
Anyway, I went ahead and resized the main 32GB Raspbian OS parition (ext4) into three partitions:
- 8 GB Raspbian OS partition (
ext4) - 22 GB partition for the LFS build (
ext4) - 2 GB swap partition (
linux-swap)
Now, did I ruin anything? Will the Raspberry Pi still boot?
It still booted!
Okay, now that I have a computer to build my Linux-From-Scratch (LFS) Operating System on, I have fullfilled all the early steps in the book. Now we have to set a LFS environment variable in Bash. In this case, pointed to the mount point of the partition I want to build in:
$ export LFS=/mnt/lfs
Right, but that is only helpful if we actually mount the damn partition:
$ sudo mkdir -pv $LFS
$ sudo mount -v -t ext4 /dev/mmcblk0p3 $LFS
Okay, I just went down a long rabbit hole regaurding nosuid and nodev parameters being set on my LFS partition. The book just says remount the partition to remove them, but these settings seem to be separate for the /dev/mmcblk0p3 and /mnt/lfs items in the mount print-out. Why? I have no idea. But I managed to fix the mount point, just not the original partition. For now I'm going to assume that is good enough and move on.
Fingers crossed.
Next it says I need to mount my swap partition. Fair enough.
$ sudo /sbin/swapon -v /dev/mmcblk0p4
I bought a cheap USB keyboard on Amazon for this project.
The # and | keys are broken.
Damn. Those are important in bash.
I am sitting here playing around with various custom key maps. But this is not what I wanted to spend my time on.
Okay, now I have to download a bunch of packages worth of source code and probably some kernel stuff. I fully expect this to take a long time, over the WIFI on my Raspberry Pi.
First, we will create a directory for all the source code to live while I am working:
$ sudo mkdir -v $LFS/sources
$ sudo chmod 755 $LFS/sources
Now we need to grab the list of package web addresses:
$ wget http://www.linuxfromscratch.org/lfs/view/development/wget-list
And, if all goes well, we can just use wget again to retrieve all the packages:
$ wget --input-file=wget-list --continue --directory-prefix=$LFS/sources
And now we play the waiting game... The waiting game is boring, let's play Hungry, Hungry Hippos.
Nom nom nom...
Shower and Bed
Chapters 4 and 5 tomorrow.