Differences

This shows you the differences between two versions of the page.

--- infrastructure:schroot [2021/10/18 10:16] – s_fuyedc
+++ infrastructure:schroot [2022/09/01 15:01] (current) – stelter
@@ Line 1: / Line 1: @@
-=====Creating a 20.04 environment with noetic on an 18.04 system======
+=====Creating a 20.04 environment with ROS noetic on an 18.04 system======
 From http://wiki.ros.org/ROS/Tutorials/InstallingIndigoInChroot
-This setup is for installing 20.04 alongside an 18.04 system on the same machine, without the need to reboot to a different mounting point. If you want it the other way around (hosting a 20.04 system and creating a 18.04 environment) [[infrastructure/schroot-18.04-on-20.04|go to this page instead]].
+This setup is for installing 20.04 and ROS noetic alongside an 18.04 system on the same machine, without the need to reboot to a different mounting point. If you want it the other way around (hosting a 20.04 system and creating a 18.04 environment) [[infrastructure/schroot-18.04-on-20.04|go to this page instead]].
 ===Setup schroot env===
@@ Line 18: / Line 18: @@
 </code>
-Now put the following settings into it.
+Now put the following settings into it. Don't forget to replace your own username at 'users' and to remove the comment after the user name.
 <code>
@@ Line 28: / Line 28: @@
 root-groups=root
 root-users=root
+profile=default
 </code>
@@ Line 97: / Line 98: @@
-===Additional===
+===Final touches===
-For a little bit more convenience, put the following in your host-machine's bash setup (.bashrc or .bash_profile, as I prefer). Streaming to /dev/null only prevents these calls to produce output. The conditional (== "focal") depends on the name of your environment, which was set in the file at the beginning of this page.
+For a little bit more convenience, put the following in your host-machine's bash setup (.bashrc in the home directory). Streaming to /dev/null only prevents these calls from producing output. The conditional (== "focal") depends on the name of your environment, which was set in the file at the beginning of this page. The PYTHONPATH needs to be reset because focal and bionic use different default versions of python. Also, the ssh-agent needs a restart when the environment changes.
 <code>
@@ Line 114: / Line 115: @@
-The following aliases make things a bit more convenient.
+The following aliases can be used to create a persistent schroot session, which you can easily connect to.
 <code>
@@ Line 121: / Line 122: @@
 alias stop_noetic='schroot -e -c noetic' # terminates the schroot session
 </code>
+If the following message appears when calling 'start_melodic', a session already exists.
+<code>
+Failed to lock chroot: /var/lib/schroot/session/melodic: Failed to write session file: File exists
+</code>
+Congratulations, you can now connect to the 20.04 environment from your 18.04 machine. Run packages for noetic while in your 20.04 environment, and those for melodic on your host machine.