Ubuntu 20 04 modifications

v1

Minimum Ubuntu Desktop install

sudo su

passwd
dorp6

apt install openssh-server vim net-tools

vim /etc/ssh/sshd_config
PermitRootLogin yes
systemctl restart ssh

vim /etc/default/grub
GRUB_CMDLINE_LINUX_DEFAULT="net.ifnames=0 biosdevname=0 i8042.noaux=1"
GRUB_CMDLINE_LINUX_DEFAULT="noresume"
update-grub

cat << EOF > /root/remove_old_kernels.sh
#!/bin/bash
dpkg -l 'linux-[ihs]*' | sed '/^ii/!d;/'"$(uname -r | sed "s/\([-0-9]*\)-\([^0-9]\+\)/\1/")"'/d;s/^[^ ]* [^ ]* \([^ ]*\).*/\1/;/[0-9]/!d' | tee zu_entfernende_Kernel
cat zu_entfernende_Kernel | xargs sudo apt-get -y purge
rm zu_entfernende_Kernel
EOF

e2fsck -f /dev/sda1
tune2fs -U f6fec0c6-bc88-46d3-b125-e450709f1956 /dev/sda1

replace UUID by f6fec0c6-bc88-46d3-b125-e450709f1956 in /boot/grub/grub.cfg

echo "RESUME=none" > /etc/initramfs-tools/conf.d/resume

wget -qO - http://packages.openrobotino.org/keyFile | sudo apt-key add -
echo "deb http://packages2.openrobotino.org focal main" > /etc/apt/sources.list.d/openrobotino.list

gcc

Wenn kein gcc installiert ist

apt install gcc-7 g++-7

Wenn gcc-9 installiert ist:

update-alternatives --remove-all gcc 
update-alternatives --remove-all g++

apt install gcc-7 g++-7 gcc-9 g++-9

sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-7 10
sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-9 20

sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-7 10
sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-9 20

sudo update-alternatives --install /usr/bin/cc cc /usr/bin/gcc 30
sudo update-alternatives --set cc /usr/bin/gcc

sudo update-alternatives --install /usr/bin/c++ c++ /usr/bin/g++ 30
sudo update-alternatives --set c++ /usr/bin/g++

update-alternatives --config gcc
update-alternatives --config g++

v2

apt install vino

**** run this as user robotino !!!
gsettings set org.gnome.Vino require-encryption false

apt install qdirstat gdebi

add-apt-repository ppa:open62541-team/ppa
apt install libopen62541-1-dev

sed -i -e 's/enabled=1/enabled=0/g' /etc/default/apport

to be installed

Realsense

sudo apt-key adv --keyserver keys.gnupg.net --recv-key C8B3A55A6F3EFCDE || sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-key C8B3A55A6F3EFCDE
sudo add-apt-repository "deb http://realsense-hw-public.s3.amazonaws.com/Debian/apt-repo bionic main" -u

apt install librealsense2==2.38.1-0~realsense0.3378
apt-mark hold librealsense2

optinal

sudo apt-get install librealsense2-dbg