(I am not sure if this is proper forum for these type of questions - if not could you recommend me which one would be better ?)
we have several VMs (Linux) under ESXI5. I would like to add disks to these VMs. Is it possible to install any software on these
Linux servers which will allow me using CLI to add those disks from inside VMs (of course with authentication) ?
Welcome to the Community.
You can have PowerCLI installed in one of the VM's and connect to the the ESXi Server and Add disks to VM's.
Its possible through linux machines too but is not supported.
Check this link for Linux http://www.cloud-buddy.com/?p=1218
For Windows machines vSphere PowerCLI Documentation
You could try RVC.
You could also check vSphere CLI which is supported on linux VMware vSphere 5: Private Cloud Computing, Server and Data Center Virtualization