Comment 2 for bug 1942455

The /etc/passwd is regenerated and configured during bootstrap, and later during upgrade and runtime.
./stx/stx-puppet/puppet-manifests/src/modules/platform/manifests/users.pp
  -> user { 'sysadmin':
    ensure => 'present',
    groups => ['root', $::platform::params::protected_group_name],
    home => '/home/sysadmin',
    password => $sysadmin_password,
    password_max_age => $sysadmin_password_max_age,
    shell => '/bin/sh',
  }

The shell should be changed to '/bin/bash'.