Month: September 2021

Tty services are enabled in the later parts of the yocto build as a result of sources compiled earlier in the build process. As part of the compilation of these files a text file

presets/90-systemd.preset b/presets/90-systemd.preset

is analysed. If the line

enable getty@.service

is found then tty1 will be enabled at a later date when an appropariate symlink is added to the folder getty.target.wants. If the ‘enable’ is replaced with ‘disable’ in the file then no symlink will be added. One solution is therefore to create a suitable systemd_%.bbappend to patch the above line.

To end an unresponsive telnet session you first have to get the telnet prompt up. You can do this by pressing the CTRL key and ‘]’. Once the prompt is up enter ‘quit’ and press the return key.

For instructions on how to escape the same situation in ssh follow the link ssh: How to Escape a Dead of Unresponsive Session.