For a basic usage of GNS3, some configuration is needed after you install "gns3" and "gns3-server" in your Manjaro or Arch Linux machine.
Required group permissions for the linux user are "wireshark" (for using the live capture of packets) and "libvirt" (for using virtualization capabilities, required for example for NAT, as mentioned in the previous blog entry).
Commands to execute are :
sudo usermod -aG wireshark user
sudo usermod -aG libvirt user
replace "user" with your username for the Linux session.
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