When start wireshark, I met an error like: 


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Couldn't run /usr/bin/dumpcap in child process: Permission denied



Solution: 


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sudo apt-get install libcap2-bin wireshark 

sudo chgrp myusername /usr/bin/dumpcap 

sudo chmod 750 /usr/bin/dumpcap 

sudo setcap cap_net_raw,cap_net_admin+eip /usr/bin/dumpcap