userdoc:tt_restricted_user_login [AstLinux Documentation]

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====== Restricted User Login ======

AstLinux now supports a restricted login shell ''/bin/rbash'' for optional non-root users.  The [[https://www.gnu.org/software/bash/manual/html_node/The-Restricted-Shell.html|Restricted Shell]] is a special mode of ''bash''.

Restricted users are allowed access via SSH, the console, and if enabled the CLI tab of the web interface.

!!Note ->!! Neither ''scp'' or ''sftp'' are allowed with a restricted user account, though SSH tunneling and SOCKS web proxy does work by default.

!!Note ->!! If the FTP Server is enabled, by default, restricted user accounts will be allowed unless a custom ''/mnt/kd/vsftpd.conf'' is used.

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!!Note: AstLinux 1.2.10 or later is required!!
===== Add Restricted User =====

A restricted user (''staff'' in this example) can be added using the CLI as ''root'', using the command:

  adduser -s /bin/rbash staff
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!!Warning ->!! Never change the ''root'' user's login shell to ''/bin/rbash'' !

===== Commands Available =====

A restricted user only has access to the commands in ''/usr/rbin'', and additionally ''/mnt/kd/rbin'' if it exists.

An example set of command are:

  arp          df           grep         ifconfig     ls           nslookup     ps           traceroute   uptime
  clear        fping        host         iftop        mtr          ping         ss           traceroute6  whoami
  date         fping6       htop         ip           netstat      ping6        top          uname        whois

Determine the exact set of commands on your system with the command:

  ls /usr/rbin/

Additionally, if this directory exists:

  ls /mnt/kd/rbin/