remove-shell - remove shells from the list of valid login shells

remove-shell  operates  on  the  temporary files /etc/shells.tmp and /etc/shells.tmp2 to remove the given
       shells from the list of valid login shells, and copy the result back to /etc/shells.

DPKG_ROOT
              specifies the base path under which /etc/shells resides.

       remove-shell - remove shells from the list of valid login shells

shells(5)

                                                   23 Sep 2021                                   REMOVE-SHELL(8)

remove-shellshellname [shellname...]