Provided by: debianutils_5.7-0.3_amd64
add-shell - add shells to the list of valid login shells
add-shell shellname [shellname...]
add-shell copies /etc/shells to /etc/shells.tmp, adds the given shells to this file if they are not already present, and copies this temporary file back to /etc/shells. The shells must be provided by their full pathnames.
DPKG_ROOT specifies the base path under which /etc/shells resides.
shells(5) 23 Sep 2021 ADD-SHELL(8)