Could it be harmful to install PowerShell on Linux?
Recently Microsoft offer solution to install PowerShell on Linux.
I would like to know if it could be dangerous for the Linux and derivative.
It's as safe as any other app you can install.
Not anymore than any of the other (UNIX) shells you have installed -- and if one is targeting a Linux system, they'd probably expect to find (and, if possible, exploit) them, not Powershell.