Debian Buster: “tcpdump -w file” works only in some directories
问题 The following command (called as user root with and without -i eno ) tcpdump -w a.dump -i eno1 portrange 27900-27901 works only in some directories, eg. /tmp and /root . But it works not in other directories, for example not in /temp created with: mkdir /temp chown root.root /temp chmod 700 /temp Stopped apparmor , but it doesn't help. Any ideas to enable other directories? 回答1: Problem solved. It was AppArmor. I learned the stopping the service does not stop the protection. In detail, there