Differences

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--- infrastructure:schroot-18.04-on-20.04 [2021/10/18 10:45] – s_fuyedc
+++ infrastructure:schroot-18.04-on-20.04 [2021/10/20 11:58] (current) – hassouna
@@ Line 12: / Line 12: @@
 </code>
-Describe the new environment to build (in this case its 18.04 bionic). Open a new conf file first.
+Describe the new environment to build (in this case its 18.04 bionic). Open a new conf file first. Here gedit is used, feel free to use your favorite editor instead.
 <code>
@@ Line 18: / Line 18: @@
 </code>
-Now put the following settings into it.
+Now put the following settings into it. Don't forget to put the username of your host machine as users.
 <code>
@@ Line 25: / Line 25: @@
 type=directory
 directory=/srv/chroot/bionic
-users=cram ## put the username of your host-machine here
+users=cram ## put the username of your host machine here
 root-groups=root
 root-users=root
@@ Line 97: / Line 97: @@
-===Additional===
+===Final touches===
-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 to produce output. The conditional (== "bionic") 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.
+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 (== "bionic") 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 120: / Line 120: @@
 alias start_melodic='schroot -b -p -c bionic -n melodic' # creates a persistent schroot session
 alias stop_melodic='schroot -e -c melodic' # 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 18.04 environment from your 20.04 machine. Run packages for melodic while in your 18.04 environment, and those for noetic on your host machine.