Step by Step full Disk Encryption GENTOO after Windows Install

avoid forget it how 2 do it since i tend to lost my notes :0

Installer environment:

# fdisk n p +512 t 4 a 3
# fdisk n e FULL


--------------------/dev/sda layout------------------------
/dev/sda1 * 7 boot win7
/dev/sda2 7 c:
/dev/sda3 * 4 512 linux boot
/dev/sda4 5 extended


# mkfs.ext2 /dev/sda3
# cryptsetup luksFormat -c aes-cbc-essiv:sha256 /dev/sda5
 YES
  pass
# cryptsetup luksOpern /dev/sda5 lvm
# lvm pvcreate /dev/mapper/lvm
# vgcreate vg0 /dev/mapper/lvm
# lvcreate -l 100%FREE -n root vg0
# mkfs.ext4 /dev/mapper/vg0-root
# mount /dev/mapper/vg0-root /mnt/gentoo


----------------AFETER DOWNLOAD STAGE TARBALL-----------

# cd /mnt/gentoo
# tar xvf stage-blabla.tar.blabla
# mkdir --parents /mnt/gentoo/etc/portage/repos.conf
# cp /mnt/gentoo/usr/share/poratege/config/repos.config \
       /mnt/gentoo/etc/portage/repos.conf/gentoo.conf
# mirrorselec -i -o >> /mnt/gentoo/etc/portage/make.conf


---------------------FILE ../make.conf ------------------
CFLAGS="-march=native -O2 -pipe"
CXXFLAGS="${CFLAGS}"
MAKEOPTS="-j2"
all the other are defaults


# cp --dereference /etc/resolv.conf /mnt/gentoo/etc
# mount -t proc /proc /mnt/gentoo/proc
# mount --rbind /sys /mnt/gentoo/sys
# mount --make-rslave /mnt/gentoo/sys
# mount --rbind /dev /mnt/gentoo/dev
# mount --make-rslave /mnt/gentoo/dev
# test -L /dev/shm && rm /dev/shm && mkdir /dev/shm
# mount -t tmpfs -o nosuid,nodev,noexec shm /dev/shm
# chmod 1777 /dev/shm
# chroot /mnt/gentoo /bin/bash
# . /etc/profile
# export PS1="(chroot)${PS1}"
# mount /dev/sda3 /boot
# emerge-webrsync
# eselect profile (list|set) <--- make your choice
# emerge --update --deep --newuse @world


if for some reason need to suspend the install boot again and repeat the steps above except emerge and eselect commands

# echo "YOUR/TUMEZONE" > /etc/timezone
# locale-gen
# emerge --config sys-libs/timezone-data
# eselect locale (list|set) <-------- list and set your locale
# env-update && source /etc/profile
# emerge sys-kernel/gentoo-sources
# emerge sys-kernel/genkernel
# emerge sys-fs/cryptsetup
# genkernel --luks --lvm all
# emerge -av grub
# emerge sys-boot/os-prober


in order to grub to decrypt the system it needs to adjust the grub file

------- FILE /etc/default/grub---------------------------------- GRUB_CMDLINE_LINUX="dolvm crypt_root=UUID=your uuid root=/dev/mapper/vg0-root"

# grub-install /dev/sda
# grub-mkconfig -o /boot/grub/grub.cfg


------- FILE /etc/fstab----------------------------------
/dev/sda3 /boot ext2 noauto,noatime 1 2
/dev/sda5 / ext4 defaults 0 1
shm /shm tmpfs nodev,nosuid,noexec 0 0


At this point and after setting up the user account and pass 4 root we will be able to boot into full disk encrypted device

HEROKU Gem::LoadError: can't activate pg (~> 0.15) fix trick

Recently I came accross with one nasty error on Heroku when recreating some old web app that i were developing when pushin the changes and tring to do: $ heroku run rake db:migrate the heroku answer where somthing like -> Gem::LoadError: can't activate pg (~> 0.15), already activated pg-1.0.0. Make sure all dependencies are added to Gemfile. It really frustates me and google it for a while. I deleted the app and try it again, did not work. I did some research and try on terminal from Heroku, tried to delete the pg and then install it again, did not work. any wat tried some other solutions that came from google but did not work, and here is the solution 

 

as you can see the pf gem needs to change in its definition dont really know why this happen but it seems that the problem arised on an updating rails from claud9 ide.

Anyway this worked 4 me 

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