Linux – group member cannot delete file with rw permission – Super User https://superuser.com/questions/784952/linux-group-member-cannot-delete-file-with-rw-permission
linux – Why can’t I delete a file where I have group write permissions on? – Super User http://superuser.com/questions/373115/why-cant-i-delete-a-file-where-i-have-group-write-permissions-on
filesystems – How does the sticky bit work? – Unix & Linux Stack Exchange http://unix.stackexchange.com/questions/79395/how-does-the-sticky-bit-work
Time machine backup slow until I disabled real-time protection – Avira Answers https://answers.avira.com/en/question/time-machine-backup-slow-until-i-disabled-realtime-protection-46705
Adding folders and files exceptions for the Real-Time Protection of Avira Free Antivirus for Mac – Avira Answers https://answers.avira.com/en/question/adding-folders-and-files-exceptions-for-the-realtime-protection-of-avira-free-antivirus-for-mac-9751?sh=true