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--- aix:recover_passwd [2023/06/05 12:54]
manu created
+++ aix:recover_passwd [2023/06/05 12:59] (current)
manu
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 ====== Recover root password ======
+Recovering the root Password in AIX
+Answer
+CONTENTS:
+    INTRODUCTION
+    SCOPE
+    BOOTING YOUR SYSTEM INTO SERVICE MODE
+    RECOVERING THE ROOT PASSWORD
+INTRODUCTION
+------------
+This TechNote looks at how to reset/recover the root password when it
+has been forgotten/misplaced.
+SCOPE
+-----
+Applicable to all versions of AIX.
+BOOTING YOUR SYSTEM INTO SERVICE MODE
+-------------------------------------
+If your sysytem uses an Hardware Management Console (HMC), please see
+the following technote to boot into Service/Maintenence Mode...
+https://www.ibm.com/support/pages/node/720545
+If your system is a microchannel system do the following to boot it into
+Service Mode:
+Turn the key to the Maintenance position and press the yellow Reset
+button twice. You must boot from bootable media, such as an installation
+CD-ROM, installation tape or a bootable backup tape made via the mksysb
+command or the Sysback product of the correct level for this machine
+If your systems is a PCI-based system do the following to boot it into
+Service Mode:
+When booting a PowerPC into Service mode, cd0 or rmt0 must be before the
+hdisk in the bootlist. If not, change the bootlist at boot time. On some
+models, you can set the machine to use a default bootlist that includes
+both cd0 and rmt0. If a bootable CD or tape is in the CD-ROM or tape
+drive, the machine will boot from this device.
+For most of the newer PCI-based models, selecting the default bootlist,
+with a bootable tape or CD loaded in the machine, causes the system to
+automatically boot from that device. Generally, the next menu on the
+screen asks the administrator to define the system console.
+For all machines discussed here, if you are using a graphical terminal,
+you will use a function key such as F5. If you are using an ASCII
+terminal, use an equivalent number key such as 5. Use the numbers across
+the top of the keyboard, not the numbers on the numeric keypad. On ASCII
+terminals, the icons may not be displayed on the screen; the number can
+be pressed between the second and the third beeps, the second beep being
+a series of three clicks.
+RECOVERING THE ROOT PASSWORD
+----------------------------
+Once the system is Service Mode and you've booted on the bootable media,
+which is of the same version and level as the system, follow the prompts
+to the Welcome to Base OS menu.
+. Choose Start Maintenance Mode for System Recovery (Option 3).
+. The next screen displays prompts for the Maintenance Menu
+                Choose Option 1: Acess a Root Volume Group
+. The next screen prints a warning message and asks you to select
+to continue.
+                Select 0 to Continue
+. The next screen asks you to select the proper volume group.
+                Select the proper volume group for your machine.
+. The console will display information about rootvg and a menu
+           with two options.
+                Choose option 1: Access this volume group and start a
+                                 shell
+. Once you have the command prompt, run the passwd command:
+                passwd
+                Changing password for "root"
+                root's New password:
+                Enter the new password again:
+. With the key in Normal position (if applicable), issue the
+           reboot command:
+                sync;sync;sync;reboot

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