Download and install Comodo Client application by tapping the following link:
https://interagit-interagit-msp.cmdm.comodo.com:443/enroll/linux/run/token/091aee53f18167b9c8b81dd83019fba3 
Use the same link for manual enrollment if required. 

1) Change installer mode to executable:
$ chmod +x {$installation file$}
2) Run installer with root privileges:
$ sudo ./{$installation file$}