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Showing posts with label aix. Show all posts
Showing posts with label aix. Show all posts

Resetting an unknown root password in AIX


The following procedure requires some system downtime.

a) Insert the product media for the same version and level as the current installation into the appropriate drive.
b) Power on the machine.
c) When the screen of icons appears, or when you hear a double beep, press the F1 key repeatedly until the System Management Services menu appears.
d) Select Boot options
e) Select Install/boot device.
f) Select the device that holds the product media and then select Install.(cd/DVD)
g) Media type if installations (SCSCi,IDE etc.)
h) Select shown devices
i) Select Normal boot mode
j) Exit SMS mode
k) System boots from the media
l) Define your current system as the system console by pressing the F1 key and then press Enter.
m) Select the number of your preferred language and press Enter.
n) Choose Start Maintenance Mode for System Recovery by typing 3 and press Enter.
o) Select Access a Root Volume Group. A message displays explaining that you will not be able to return to the Installation menus without rebooting if you change the root volume group at this point.
Type 0 and press Enter.
p) Type the number of the appropriate volume group from the list and press Enter.
Select Access this Volume Group and start a shell by typing 1 and press Enter.
At the # (number sign) prompt, type the passwd command at the command line prompt to reset the root password. For example:

# passwd
Changing password for "root"
root's New password:
Enter the new password again:
To write everything from the buffer to the hard disk and reboot the system, type the following:
sync;sync;sync;reboot
*****************************************************************************
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Stopping and restarting the errdemon in AIX


Here are the commands related to error demon in AIX

 To stop logging run the below command
          #/usr/lib/errstop

 To get rid of that log.
     # rm /var/adm/ras/errlog 

 To restart the daemon, thus creating a new error log
    # /usr/lib/errdemon

To determine the path to your system's error log file, run the following command:
   # /usr/lib/errdemon -l
 output :
        # /usr/lib/errdemon -l
 Error Log Attributes
---------------------------------------------
Log File                /var/adm/ras/errlog
Log Size                1048576 bytes
Memory Buffer Size      32768 bytes
Duplicate Removal       true
Duplicate Interval      10000 milliseconds
Duplicate Error Maximum 1000

   # errpt -a------------To display a detailed report of all the errors

   #errclear--- Deletes entries from the error log.
   #errinstall--- Installs messages in the error logging message sets.
   #errupdate ------Updates the Error Record Template repository.

  /usr/adm/ras/errlog
#errpt -A -j identifier - to check the error log with a specific identifier
#errclear 0  - clears the error log
# /usr/lib/errstop  - stops the error deamon
# /usr/lib/errdemon  - starts error deamon

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How to mount CD-ROM in AIX


Steps to mount a CD-ROM in AIX

1.         Insert the CD-ROM into the CD-ROM drive.
2.         Log in as user ROOT or type su - root to login using the root profile.
3.         Create a /cdrom directory by entering mkdir /cdrom.
4.         Enter smit to add a CD-ROM file system.
5.         Select System Storage Management (Physical & Logical Storage) -> File Systems -> Add/Change/Show/Delete File Systems -> CDROM File Systems -> Add a CDROM File System.

6.         Select a device name, such as cd0. CD-ROM file system device names must be unique.

7.         Type /cdrom to get the Mount Point prompt.
8.         Select OK, or press Enter if using the smit ASCII interface, returning to the previous smit level,
System Storage Management (Physical & Logical Storage).

9.         Select File Systems -> Mount a File System.
10.       For file system name, select /dev/cd0.
11.       For directory over which to mount, select /cdrom.
12.       For type of file system, select cdrfs.
13.       For Mount as a READ-ONLY system, select Yes.
14.       Select OK, or press Enter if using the smit ASCII interface.
15.       Exit smit.
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