maybe chmod 0644 'apt/sources.list.d/fbrehm.list'
maybe chmod 0644 'apt/sources.list.d/fbrehm.list.2019-09-04.buster.bak'
maybe chmod 0644 'apt/sources.list.d/fbrehm.list.2021-09-16.bullseye.bak'
+maybe chmod 0644 'apt/sources.list.d/icinga.list'
maybe chmod 0644 'apt/sources.list.d/salt.list'
maybe chmod 0644 'apt/sources.list.d/salt.list.2021-04-08.buster.bak'
maybe chmod 0644 'apt/sources.list.d/salt.list.2021-10-31.bullseye.bak'
--- /dev/null
+deb [signed-by=/usr/share/keyrings/icinga-archive-keyring.gpg] https://packages.icinga.com/debian icinga-bookworm main
+deb-src [signed-by=/usr/share/keyrings/icinga-archive-keyring.gpg] https://packages.icinga.com/debian icinga-bookworm main