cali@HomeLaptop:~$ sudo chown -R ${cali}:${cali} /opt/PlaneShift
No. Do it verbatim as I wrote above, i.e. using
${USER}:${USER}. Or if you prefer, do it as
cali:cali${USER} is a variable name here, which contains your user name. Since you already know it, you can use the user name explicitly. Writing ${cali} is incorrect, because there is no such variable declared, so it'll expand to empty string.