Distributed Services With Go -

I went to SecureYourServices folder and executed make gencert. I am getting the following error.

2020/06/17 21:03:54 [INFO] generate received request

2020/06/17 21:03:54 [INFO] received CSR

2020/06/17 21:03:54 [INFO] generating key: rsa-2048

2020/06/17 21:03:54 [INFO] encoded CSR

2020/06/17 21:03:54 [INFO] signed certificate with serial number 227901867813015173697768058483782343857847665497

mv *.pem *.csr /Users/sshil/.proglog/

usage: mv [-f | -i | -n] [-v] source target

mv [-f | -i | -n] [-v] source … directory

make: *** [gencert] Error 64