Navigate

CentOS / RHEL 6 : How to password-protect single user mode

Locking down single-user mode in RHEL6 requires editing /boot/grub/grub.conf and /etc/sysconfig/init.

1. Change the definition of the single user login shell in /etc/sysconfig/init from sushell to sulogin

# vi /etc/sysconfig/init
...
# Set to '/sbin/sulogin' to prompt for password on single-user mode
# Set to '/sbin/sushell' otherwise
SINGLE=/sbin/sulogin

2. You can also use sed to directly change the required line :

# sed -i "s,^SINGLE=.*,SINGLE=/sbin/sulogin," /etc/sysconfig/init

3. Doing the above results in single-user mode showing the same login prompt normally seen in emergency (maintenance) mode as shown below :
Related Post
  1. mk Command Examples

    mk is a task runner tool commonly used for controlling the compilation process of executables…

  2. mixxx Command Examples

    Mixxx is a free and open-source DJ software designed for DJs of all skill levels.…

  3. mix Command Examples

    Mix is a versatile build tool designed specifically for Elixir projects. It offers a wide…

  4. mitmproxy Command Examples

    mitmproxy is an interactive HTTP proxy tool that operates as a man-in-the-middle (MITM) between a…

  5. mitmdump Command Examples

    mitmdump is a command-line tool that is part of the mitmproxy suite, which is designed…