Try to boot into single user mode

1 files changed, 79 insertions, 0 deletions

diff --git a/README.md b/README.md
index 7e1a621..e382e0a 100644
--- a/README.md
+++ b/README.md
@@ -909,6 +909,85 @@ Your report should include advice to other people attempting to do the same.
 		graphical.target
 		```
 
+		To change the run level for a running system to single user mode, I need to change the run level to 1.
+
+		```bash
+		モ systemctl isolate rescue.target
+		```
+
+    After running the above command the GUI's dissappeared and it looked like my
+    system was reboot. A single shell was shown with the following output:
+
+    ```bash
+    Fedora 30 (Workstation Edition)
+    Kernel 5.2.13-200.fc30.x86_64 on an x86_64 (tty2)
+
+    localhost login: mokha
+    Password:
+    System is going down. Unprivileged users are not permitted to log in anymore. For technical details, see pam_nologin(8).
+
+    Authentication failure
+    ```
+
+    The man page for `pam_nologin` says:
+
+
+    ```bash
+    DESCRIPTION
+          pam_nologin is a PAM module that prevents users from logging into the system when /var/run/nologin or
+          /etc/nologin exists. The contents of the file are displayed to the user. The pam_nologin module has no
+          effect on the root user's ability to log in.
+    ```
+
+    So I tried to enable logins for the root user.
+
+    ```bash
+    モ sudo -i
+    [sudo] password for mokha:
+    [root@localhost ~]# whoami
+    root
+    [root@localhost ~]# passwd
+    Changing password for user root.
+    New password:
+    Retype new password:
+    passwd: all authentication tokens updated successfully.
+    ```
+
+    Then I tried to change the run level again. This time it would return me to
+    the graphical login prompt.
+
+    Next, I tried to look at the help for `init`.
+
+    ```bash
+    モ init --help
+    init [OPTIONS...] {COMMAND}
+
+    Send control commands to the init daemon.
+
+        --help      Show this help
+        --no-wall   Don't send wall message before halt/power-off/reboot
+
+    Commands:
+      0              Power-off the machine
+      6              Reboot the machine
+      2, 3, 4, 5     Start runlevelX.target unit
+      1, s, S        Enter rescue mode
+      q, Q           Reload init daemon configuration
+      u, U           Reexecute init daemon
+
+    See the telinit(8) man page for details.
+    ```
+
+    I decided to try using `init` to set the run level to recue mode.
+
+    ```bash
+    モ init 1
+    ```
+
+    This produced the same affect as earlier. So I was not able to switch into
+    single user mode from Fedora.
+
+
   b. What’s difference between single-user mode and how the system normally runs?
 
 		> Single-user mode is a mode where only the administrator (root) has access to the computer, the mode is designed for maintenance and is often used for repairs. - https://www.tldp.org/LDP/GNU-Linux-Tools-Summary/html/x5152.htm