Setting up init-system-helpers (1.29ubuntu2) ... /var/lib/dpkg/info/init-system-helpers.postinst: 6: /var/lib/dpkg/info/init-system-helpers.postinst: Cannot fork
This suggests a local configuration problem - too many process, hitting resource limits, not enough memory, or similar.
Setting up init-system-helpers (1.29ubuntu2) ... dpkg/info/ init-system- helpers. postinst: 6: /var/lib/ dpkg/info/ init-system- helpers. postinst: Cannot fork
/var/lib/
This suggests a local configuration problem - too many process, hitting resource limits, not enough memory, or similar.