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

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 

Reference:http://ubuntuforums.org/showthread.php?t=2039978