Into chapter 10, updating notes.
This commit is contained in:
Shaun Setlock
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# Chapter 10 - Making the System Bootable
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## Sections 10.1 - Introduction
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So close, just need to ...
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- [ ] Create `/etc/fstab`
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- [ ] Build our Kernel
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- [ ] Install GRUB
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## Section 10.2 - F-Stab!
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We need to create our table of filesystems for the kernel.
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```
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cat > /etc/fstab << "EOF"
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# Begin /etc/fstab
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# file system mount-point type options dump fsck
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# order
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/dev/sdb2 swap swap pri=1 0 0
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/dev/sdb3 / ext4 defaults 1 1
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/dev/sdb4 /home ext4 defaults 1 2
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proc /proc proc nosuid,noexec,nodev 0 0
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sysfs /sys sysfs nosuid,noexec,nodev 0 0
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devpts /dev/pts devpts gid=5,mode=620 0 0
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tmpfs /run tmpfs defaults 0 0
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devtmpfs /dev devtmpfs mode=0755,nosuid 0 0
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tmpfs /dev/shm tmpfs nosuid,nodev 0 0
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cgroup2 /sys/fs/cgroup cgroup2 nosuid,noexec,nodev 0 0
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# End /etc/fstab
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EOF
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```
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## Section 10.3 - Building the Linux Kernel
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We finally get to build the kernel!
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```
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make mrproper
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make menuconfig
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```
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Follow the selections in LFS book, the exit and save the configuration.
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Then we can compile the kernel,
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```
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make
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```
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and install any kernel moduels,
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```
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make modules_install
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```
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Then move the freshly built kernel image to the boot partition,
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```
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cp -iv arch/x86/boot/bzImage /boot/vmlinuz-6.10.5-lfs-12.2
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```
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and bring its symbols map file,
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```
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cp -iv System.map /boot/System.map-6.10.5
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```
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and might as well include the kernel configuration file too,
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```
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cp -iv .config /boot/config-6.10.5
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```
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then install the kernel's documentation.
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```
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cp -r Documentation -T /usr/share/doc/linux-6.10.5
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```
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## Section 10.4 - Using GRUB and its Configuration
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We need to install grub on our hard drive device. In this case, I have been working on separate hard drive device presented to the VM. The first ~500MB of that device was left unformatted to be available for GRUB.
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```
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grub-install /dev/sdb
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```
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and then create its config file,
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```
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cat > /boot/grub/grub.cfg << "EOF"
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# Begin /boot/grub/grub.cfg
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set default=0
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set timeout=5
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insmod part_gpt
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insmod ext2
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set root=(hd0,3)
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menuentry "GNU/Linux, Linux 6.10.5-lfs-12.2" {
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linux /boot/vmlinuz-6.10.5-lfs-12.2 root=/dev/sda3 ro
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}
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EOF
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```
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# Chapter 9 - System Configuration
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## Sections 9.1
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# Chapter 9 - System Configuration
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## Sections 9.1 - System V Init
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This section describes the system init that LFS, the tasks it makes to complete the boot process, and various run levels.
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## Section 9.2 - LFS Init Scripts
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LFS comes with some pre-configured scripts that work with this init process at boot time.
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> Installed scripts:
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> checkfs, cleanfs, console, functions, halt, ifdown, ifup, localnet, modules, mountfs, mountvirtfs, network, rc, reboot, sendsignals, setclock, ipv4-static, swap, sysctl, sysklogd, template, udev, and udev_retry
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> Installed directories:
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> /etc/rc.d, /etc/init.d (symbolic link), /etc/sysconfig, /lib/services, /lib/lsb (symbolic link)
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This has its own sources, and is installed with `make`.
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```
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make install
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```
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## Section 9.3 - Device and Kernel Modules
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Just light reading ...
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## Section 9.4 - Setting Up for Devices
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Create rules for naming network devices.
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```
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bash /usr/lib/udev/init-net-rules.sh
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```
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## Section 9.5 - General Network Configuration
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We need to setup the anticipated network interface.
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```
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cd /etc/sysconfig/
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cat > ifconfig.eth0 << "EOF"
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ONBOOT=yes
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IFACE=eth0
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SERVICE=ipv4-static
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IP=192.168.2.250
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GATEWAY=192.168.2.1
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PREFIX=24
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BROADCAST=192.168.2.255
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EOF
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```
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Create our `resolve.conf` file,
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```
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cat > /etc/resolv.conf << "EOF"
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# Begin /etc/resolv.conf
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domain home.lan
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nameserver 192.168.2.22
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nameserver 192.168.2.1
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# End /etc/resolv.conf
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EOF
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```
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our hostname,
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```
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echo lfs > /etc/hostname
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```
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and also our `hosts` file,
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```
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cat > /etc/hosts << "EOF"
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# Begin /etc/hosts
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127.0.0.1 localhost.localdomain localhost
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127.0.1.1 lfs.home.lan lfs
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::1 localhost ip6-localhost ip6-loopback
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ff02::1 ip6-allnodes
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ff02::2 ip6-allrouters
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# End /etc/hosts
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EOF
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```
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## Section 9.6 - Bootscript Usage and Configuration
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We need to configure SysVinit
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```
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cat > /etc/inittab << "EOF"
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# Begin /etc/inittab
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id:3:initdefault:
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si::sysinit:/etc/rc.d/init.d/rc S
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l0:0:wait:/etc/rc.d/init.d/rc 0
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l1:S1:wait:/etc/rc.d/init.d/rc 1
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l2:2:wait:/etc/rc.d/init.d/rc 2
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l3:3:wait:/etc/rc.d/init.d/rc 3
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l4:4:wait:/etc/rc.d/init.d/rc 4
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l5:5:wait:/etc/rc.d/init.d/rc 5
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l6:6:wait:/etc/rc.d/init.d/rc 6
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ca:12345:ctrlaltdel:/sbin/shutdown -t1 -a -r now
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su:S06:once:/sbin/sulogin
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s1:1:respawn:/sbin/sulogin
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1:2345:respawn:/sbin/agetty --noclear tty1 9600
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2:2345:respawn:/sbin/agetty tty2 9600
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3:2345:respawn:/sbin/agetty tty3 9600
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4:2345:respawn:/sbin/agetty tty4 9600
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5:2345:respawn:/sbin/agetty tty5 9600
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6:2345:respawn:/sbin/agetty tty6 9600
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# End /etc/inittab
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EOF
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```
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setting the system clock,
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```
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cat > /etc/sysconfig/clock << "EOF"
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# Begin /etc/sysconfig/clock
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UTC=1
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# Set this to any options you might need to give to hwclock,
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# such as machine hardware clock type for Alphas.
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CLOCKPARAMS=
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# End /etc/sysconfig/clock
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EOF
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```
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and configuring the console.
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```
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cat > /etc/sysconfig/console << "EOF"
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# Begin /etc/sysconfig/console
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UNICODE="1"
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FONT="Lat2-Terminus16"
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# End /etc/sysconfig/console
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EOF
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```
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## Section 9.7 - Configuring Locale
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This locale stuff seems really annoying .. but it's necessary. These commands use glibc to determine locale information.
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```
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LC_ALL=en_US locale language
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LC_ALL=en_US locale charmap
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LC_ALL=en_US locale int_curr_symbol
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LC_ALL=en_US locale int_prefix
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```
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Which can be used in our bash profile,
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```
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cat > /etc/profile << "EOF"
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# Begin /etc/profile
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for i in $(locale); do
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unset ${i%=*}
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done
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if [[ "$TERM" = linux ]]; then
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export LANG=C.UTF-8
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else
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export LANG=en_US.ISO-8859-1
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fi
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# End /etc/profile
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EOF
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```
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## Section 9.8 - Readline's `etc/inputrc/ File
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This file is needed to support shells, such as `bash`, interpret keyboard input.
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```
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cat > /etc/inputrc << "EOF"
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# Begin /etc/inputrc
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# Modified by Chris Lynn <roryo@roryo.dynup.net>
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# Allow the command prompt to wrap to the next line
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set horizontal-scroll-mode Off
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# Enable 8-bit input
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set meta-flag On
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set input-meta On
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# Turns off 8th bit stripping
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set convert-meta Off
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# Keep the 8th bit for display
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set output-meta On
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# none, visible or audible
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set bell-style none
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# All of the following map the escape sequence of the value
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# contained in the 1st argument to the readline specific functions
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"\eOd": backward-word
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"\eOc": forward-word
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# for linux console
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"\e[1~": beginning-of-line
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"\e[4~": end-of-line
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"\e[5~": beginning-of-history
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"\e[6~": end-of-history
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"\e[3~": delete-char
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"\e[2~": quoted-insert
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# for xterm
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"\eOH": beginning-of-line
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"\eOF": end-of-line
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# for Konsole
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"\e[H": beginning-of-line
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"\e[F": end-of-line
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# End /etc/inputrc
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EOF
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```
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## Seciton 9.9 - Set Options for Shells
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This shells available on the system must be identified.
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```
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cat > /etc/shells << "EOF"
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# Begin /etc/shells
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/bin/sh
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/bin/bash
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# End /etc/shells
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EOF
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```
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