This is an old revision of the document!
http://wiki.ros.org/ROS/Tutorials/InstallingIndigoInChroot
sudo apt-get install debootstrap schroot
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sudo gedit /etc/schroot/chroot.d/focal.conf
add these lines [focal] description=ubuntu 20.04 type=directory directory=/srv/chroot/focal users=mneumann root-groups=root root-users=root profile=default ######################################## sudo mkdir -p /srv/chroot/focal ######################################## sudo debootstrap –variant=buildd –arch=amd64 focal /srv/chroot/focal http://archive.ubuntu.com/ubuntu/ ######################################## schroot -l ######################################## sudo schroot -c focal ######################################## apt-get install sudo vim git apt-get update && apt-get install -y lsb-release && apt-get clean all ######################################## exit schroot -c focal sudo sh -c 'echo “deb http://archive.ubuntu.com/ubuntu focal universe” » /etc/apt/sources.list' sudo sh -c 'echo “deb http://archive.ubuntu.com/ubuntu focal multiverse” » /etc/apt/sources.list' sudo sh -c 'echo “deb http://archive.ubuntu.com/ubuntu focal restricted” » /etc/apt/sources.list' sudo sh -c 'echo “deb http://packages.ros.org/ros/ubuntu $(lsb_release -sc) main” > /etc/apt/sources.list.d/ros-latest.list' sudo apt install curl sudo apt install gnupg curl -s https://raw.githubusercontent.com/ros/rosdistro/master/ros.asc | sudo apt-key add - sudo apt update sudo apt install ros-noetic-desktop-full sudo apt install python3-rosdep python3-rosinstall python3-rosinstall-generator python3-wstool build-essential sudo rosdep init rosdep update