Give access to a non-root user to a root app: tcpdump exemple

Add a capture group and add yourself to it:

sudo groupadd pcap
sudo usermod -a -G pcap $USER

Next, change the group of tcpdump and set permissions:

sudo chgrp pcap /usr/sbin/tcpdump
sudo chmod 750 /usr/sbin/tcpdump

Finally, use setcap to give tcpdump the necessary permissions:

sudo setcap cap_net_raw,cap_net_admin=eip /usr/sbin/tcpdump