# Gentoo

## Setup network
ln -s /etc/init.d/net.lo /etc/init.d/net.eth0
/etc/init.d/net.eth0
emacs /etc/conf.d/net #add domain name
#or
rc-service dhcpcd start
rc-update add dhcpcd

## Start sshd
rc-service sshd start

## Install open-vm-tools
emerge --ask app-emulation/open-vm-tools
## check for installed files
qlist pybugz | grep bin
## check for the package containing the installed file
equery b /usr/share/edk2-ovmf/OVMF_CODE.fd
## list dependent packages of a package
equery depends llvm

## Remove/uninstall if no dependents
emerge -cav www-client/firefox
## Remove even if there are dependents
emerge -C www-client/firefox
## Remove all old packages
emerge -ca
emerge --depclean -a
## Remerge all dependencies.
emerge -eav
## Remove older distfiles and binpkgs
eclean-dist -d
eclean-pkg -d
## add package to world
emerge --noreplace boost cmake
or
add to /var/lib/portage/world
## unmerge with dependents
emerge --deselect $package followed by emerge -ca
emerge -uUDa @world && emerge -ca
## add -O to ignore blocks
## if conflicts -1
## --autounmask=n if don't want to pull masked packages
## binpkg -gkKG
## run this after kernel upgrade else graphics modules for nvidia won't load
emerge @module-rebuild
emerge @x11-module-rebuild
## rebuild pkges whose lib dependecies are renamed during their upgrade
emerge @preserved-rebuild

### gentoo-kernel
echo "sys-kernel/gentoo-kernel savedconfg" > /etc/portage/package.use/world
ebuild /var/db/repos/gentoo/sys-kernel/gentoo-kernel/gentoo-kernel-6.1.22.ebuild configure
cd /var/tmp/portage/sys-kernel/gentoo-kernel-6.1.22/work/modprep/
make menuconfig
ebuild /var/db/repos/gentoo/sys-kernel/gentoo-kernel/gentoo-kernel-6.1.22.ebuild configure
ebuild /var/db/repos/gentoo/sys-kernel/gentoo-kernel/gentoo-kernel-6.1.22.ebuild merge

## emerge variables
USE
FEATURES
## list all emerge variables
emerge --info

## update use
dispatch-conf
cfg-update
etc-update

## red = use flag was and is still enabled
## blue = use flag was and is still disabled
## yellow = use flag will change with this emerge, also shows percent sign for a cue without colors
## N = new, R = reinstall same version, U = upgrade version, D = downgrade, S = slotted package, B = package blocking occurred
[=] - dependency-package should have same use flag of the dependent-package. e.g openssh -> openssl[bindist=]

## TODO: Set
CONFIG_VMWARE_BALLOON
CONFIG_VMWARE_VMCI
CONFIG_VMWARE_VMCI_VSOCKETS

## enable service
/sbin/rc-update add default
rc-service avahi-daemon start

## Sync entire system to new USE flags
emerge --update --deep --with-bdeps=y --newuse --ask --verbose --keep-going -k @world --exclude "net-libs/nodejs cross-aarch64-unknown-linux-musl/gcc net-libs/nodejs cross-aarch64-unknown-linux-musl/* dev-lang/rust virtual/rust mail-client/evolution cross-aarch64-unknown-linux-musl/binutils sys-devel/llvm-common sys-devel/llvm sys-devel/clang-common sys-devel/clang-runtime sys-devel/clang sys-cluster/ceph app-office/libreoffice-l10n app-office/libreoffice net-print/cups"

## !!! Multiple package instances within a single package slot have been pulled
## !!! into the dependency graph, resulting in a slot conflict:
emerge --ask --oneshot =app-emulation/emul-linux-x86-xlibs-20120520

## To emerge the library alone
USE="-*" emerge pidgin

## Install sources and debug symbols for some-package or some-library
vi /etc/portage/env/debugsyms
CFLAGS="${CFLAGS} -ggdb"
CXXFLAGS="${CXXFLAGS} -ggdb"
FEATURES="${FEATURES} splitdebug compressdebug -nostrip"
USE="debug"
vi /etc/portage/env/installsources
FEATURES="${FEATURES} installsources"
vi /etc/portage/package.env
category/some-package debugsyms
category/some-library debugsyms installsources
emerge debugedit

## Accept Keywords specify whether to use stable or unstable
start with =, <= and (>= or nothing)

## Time
echo "Asia/Kolkata" > /etc/timezone
emerge --config sys-libs/timezone-data
## if connected over ssh check the client terminal's locale setting
vi /etc/locale.gen
locale-gen
vi /etc/conf.d/hwclock
eselect locale list
eselect locale set 5
env-update && source /etc/profile

## startx
`rc-update add elogind boot`

## set hostname
root #nano -w /etc/conf.d/hostname
## Set the hostname variable to the selected host name
hostname="tux"

## set domain
root #nano -w /etc/conf.d/net

## Set the dns_domain_lo variable to the selected domain name
```
dns_domain_lo="FerryFair.com"
config_end1="dhcp"
routes_end1="192.168.2.0/24 via 192.168.100.2
192.168.0.0/24 via 192.168.100.2"
```

## Check available package versions
eix udftools
## Check package stability
equery keywords <package>
## check ebuild to which a file belongs to
equery b /usr/include/error.h

## Install specific version
emerge --ask --autounmask-write =sys-fs/udftools-2.0

## nano /etc/sysctl.conf
net.ipv4.ip_forward = 1
net.ipv4.conf.default.rp_filter = 1

## stacked runlevel
`sudo rc-update -s add default bsp`

## List available C compilers
gcc-config -l
## Switch to compiler profile
gcc-config aarch64-unknown-linux-gnu-8.2.0

## Cross compile
```
emerge --ask sys-devel/crossdev
sudo eselect repository create cross_llvm-aarch64-gentoo-linux-musl
```
- edit `/etc/portage/repos.conf/eselect-repo.conf`
```
[cross_llvm-aarch64-gentoo-linux-musl]
location = /var/db/repos/cross_llvm-aarch64-gentoo-linux-musl
priority = 10
masters = gentoo
auto-sync = no
```
```
sudo crossdev -oS cross_llvm-aarch64-gentoo-linux-musl --llvm --target aarch64-gentoo-linux-musl
crossdev -C cross_llvm-aarch64-unknown-linux-musl
binutils-config aarch64-unknown-linux-musl
crossdev -t help
```

## -S for stable
CFLAGS="-O2 -pipe" crossdev -t aarch64-unknown-linux-musl
## if this fails with package is masked then add the package like
## =cross-aarch64-unknown-linux-musl/musl-1.2.2-r7
## in /etc/portage/package.unmask/world
emerge --sync portage-crossdev
emerge-wrapper --target aarch64-unknown-linux-musl --init
cd /usr/aarch64-unknown-linux-musl
emacs etc/portage/make.conf
## adjust -march on emerge zlib error
cd etc/portage
ln -s ../../usr/portage/profiles/default/linux/arm64/17.0 make.profile
sudo ARCH=arm64 PORTAGE_CONFIGROOT=/usr/aarch64-unknown-linux-musl/ CROSS_COMPILE=aarch64-unknown-linux-musl- eselect profile set --force 11
eselect kernel linux-rpi
aarch64-unknown-linux-musl-emerge -avkNU @system
cd /usr/aarch64-unknown-linux-musl/
mount_n_chroot
sudo FEATURES="-xattr" emerge -avk @world

## package.mask has precedence over package.unmask

## attach logs
bugz attach -c "text/plain" -d "build log" $bugnumber $log

CCACHE_DISABLE=YES CCACHE_RECACHE=yes emerge --oneshot cat/pkg
ccache -s shows cache hit statistics

ARCH=arm64 PORTAGE_CONFIGROOT=/usr/aarch64-RPi3B-linux-musl CROSS_COMPILE=aarch64-RPi3B-linux-musl- ebuild /usr/portage/sys-libs/pam/pam-1.3.0-r2.ebuild {digest|unpack|prepare|compile|preinst|install|postinst|qmerge|merge}

ROOT="/" CBUILD=aarch64-unknown-linux-musl HOSTCC=${CBUILD}-gcc PORTAGE_TMPDIR=${ROOT}tmp/ CCACHE_DIR="${ROOT}/var/CCache" emerge --update --deep --with-bdeps=y --newuse --ask --verbose @world

aarch64-...-emerge --root=/mnt/sdb2 --sysroot=/mnt/sdb2 -Kav @world

git diff | tee ../files/indent.patch

## local patches
- ``

## save iptables
sudo rc-service iptables save

## grub
grub-install --target=x86_64-efi --efi-directory=/boot
grub-mkconfig -o /boot/grub/grub.cfg

## fonts
emerge -av noto noto-emoji

## RaspberryPi
make ARCH=arm64 CROSS_COMPILE=aarch64-unknown-linux-musl- menuconfig
rc-update del hwclock boot
nano /etc/portage/make.conf
ACCEPT_KEYWORDS="~arm64"
emerge --sync
or
emerge-webrsync
emaint sync --auto
eselect profile list
emerge --update --deep --with-bdeps=y --newuse --ask --verbose -k @world
echo "*/*::rpi3 ~arm64" >> /etc/portage/package.accept_keywords/rpi3-repo

## Check distributed cc
DISTCC_DIR="/var/tmp/portage/.distcc/" distccmon-text 1

## useful emerge packs
emerge bc

## select default python
eselect python list

mkdir -pv $LFS/{dev,proc,sys,run}
mknod -m 600 $LFS/dev/console c 5 1
mknod -m 666 $LFS/dev/null c 1 3

## shairport-sync airplay
emerge -av dev-libs/libdaemon dev-libs/popt sys-devel/libtool app-doc/xmltoman dev-libs/libconfig

## gnome suspend or sleep
Alt + mouse over power button

## USE flags meaning
bindist - "binary distribution" It will disable the compilation of patented code

### Android
adb shell
su -
/data/gentoo/usr/local/bin/gentoo_init