TWS Agent Start and Stop on AIX Server

# /opt/TDWB/ep/runtime/endpoint.sh  stop
# /opt/TDWB/ep/runtime/endpoint.sh  start
# ps -ef | grep -i TDWB

SNAP in AIX

Before running a snap .You need to Remove  old snap file.
# snap -r
 
For IBM Software Case.
Below command collect all the information.
# snap -ac  

For IBM Hardware Case
# snap -gc

snap  without  dump collection
# snap -aZc


# snap -gbc

Running snap with sudo. if  there is no authorization to run cp command.
Create file  snap.pax.Z in /tmp with your permissions and execute.
# snap -ac -d /tmp/


Flags:

-@         Gathers the workload partition information.
-a           Gathers all system configuration information except HACMP™ data.
-A          Gathers asynchronous (TTY) information.
-b           Gathers SSA information.
-B          Bypasses collection of SSA adapter dumps. The -B flag only works when the -b flag is also   specified
-c          Creates a compressed pax image.
-C         Retrieves all the files in the fwdump_dir directory.
-D         Gathers dump and /unix information. The primary dump device is used.
-d          AbsolutePath  (You must specify the absolute path.)
-e          Gathers HACMP specific information. -e cannot be used with any other flags except -m and -d.
-f          Gathers file system information.
-F         Gathers flash adapter information.
-g         Gathers the output of the lslpp -hac command, which is required to recreate exact operating system environments.
-G        Includes predefined Object Data Manager (ODM) files in general information collected with the -g flag.
-i         Gathers installation debug vital product data (VPD) information.
-k        Gathers kernel information
-l         Gathers programming language information.
-L        Gathers LVM information.
-m Nodelist             Node name list (separated by commas) to gather HACMP information.
-M Timeout             Specifies the maximum time out value in seconds, that the snap frame work waits before it kills one registered external product debug data command. Default time out value is 300 seconds.
-n          Gathers Network File System (NFS) information.
-N         Suppresses the check for free space required.
-o OutputDevice     Copies the compressed image onto the specified device.
-O FileSplitSize      Used to enable splitting of the snap output files into smaller files. The size of these files is specified as a parameter to the -O option and must be specified in megabytes. This flag can only be used when the -c flag is specified.
-p         Gathers printer information.
-P Files             Retrieves the named Files from the fwdump_dir directory.
-r         Removes snap command output from the /tmp/ibmsupt directory.
-R        Gathers SCSI RAID information.
-s         Gathers Systems Network Architecture (SNA) information.
-S         Includes security files in general information collected with the -g flag.
-t          Gathers Transmission control protocol information.
-T Filename        Gathers all the log files for a multi-CPU trace. Only the base file, trcfile, is captured with the -g flag.
-v Component        Displays the output of the commands executed by the snap command. Use this flag to view the specified name or group of files.
-w          Gathers WLM information.
-X         Gathers X.25 (Packet-based Communication Protocol) information.
-Y         Gathers InfiniBand information and saves it in the /tmp/ibmsupt/IB directory.
-z          Facilitates debug data collection for external products.

Installation of the Virtual I/O Server directly from the HMC

 HMC firmware version 7.7.7 allows installation of the Virtual I/O Server directly from the HMC.

Steps:

1.Download VIOS installation .iso images from IBM website.

2.Copy installation images to the HMC. Go to HMC Management – Manage Virtual I/O Server Image Repository


3.Complete information where the images can be copied from


4. Select your brand new VIOS partition profile, and click Operations – Activate – Profile and select Yes for Install Virtual I/O Server as part of activation process?

5. Type in the IP address, subnet mask and default gateway for VIOS.

6. The installation process starts. It will do everything what is necessary to install the VIOS.

HMC console acts as a NIM server. Therefore, if the console is behind the firewall, you must ensure that all ports required by NIM are opened.


7. When the installation finished, open virtual terminal in the HMC vtmenu , and do the first login to the VIOS with a default password padmin for padmin user.

Once the VIOS is installed, you can use it as virtual media repository. It allows you to create virtual drive where you can load OS installation images (IBM i, AIX, or Linux) and proceed with OS installation completely remotely.

ITM Agent on AIX Server

To View the agent running on Server
  # /IBM/itm/bin/cinfo -r

To Start an Agent
  # /IBM/itm/bin/itmcmd agent  start all 
         {all can be replaced with ul/ux/um}

 To Config Agent
 # /IBM/itm/bin/itmcmd config -A  ul
   {ul/ux/um}

PATH Variable Empty Component

Empty Component in $PATH means "Current directory".

If you wish to include  the current directory in the search path.You need to keep ":" in $PATH.

Eg:
PATH=:/bin:/usr/bin:/usr/X11R6/bin:/usr/local/bin Current directory first
PATH=/bin:/usr/bin:/usr/X11R6/bin:/usr/local/bin: Current directory last
PATH=/bin:/usr/bin:/usr/X11R6/bin::/usr/local/bin Current directory in middle

With above you can execute the scripts directly from your current path without ./ .

USB Drive Mount Procedure on AIX Server.

1.Connect the USB drive to the server and discover it in OS.
      #cfgmgr

2. Find the newly detected USB device name:
     #lsdev -C|grep usbms

    Ex: assume the newly detected device name is usbms0

3. create the filesystem on USB drive:
           #mkfs -V jfs2 -o ea=v2 /dev/usbms0
4. Create the mount point and mount the drive on it.
       #mkdir /usbdrive
       #mount -o log=NULL /dev/usbms0 /usbdrive
5. Check is drive mounted or not:
        # df -g|grep usbdrive
6. copy the data to it
        #cp /work/test.txt /usbdrive
        #ls -l /usbdrive  -- should show test.txt file in it.

Convert the EMC power disk as a boot disk

Convert the EMC power disk as a boot disk

1. Ensure that all hdisks are configured properly

2. Use the rmdev command with the -d option to remove all

   PowerPath devices, including the powerpath0 device. All PowerPath

   Devices must be deleted. 

  #lsdev -Cc disk|grep power|awk '{print "rmdev -Rdl "$1}'|ksh

  #rmdev -dl powerpath0

4. Run lsdev -Ct power. No devices should be listed in the output.

5. Determine which hdisks on the storage system will receive the copy Of the operating system. 

  

6. Run alt_install_disk -C hdisk_list to create the copy on the  storage system hdisk(s).

7. Reboot the system.The system should boot using the hdisks specified

8. Run bootlist -m normal -o to determine which hdisk is in the bootlist.

9. Use powermt to determine which hdiskpower contains the hdisk in the boot list.

  

10. Use the bootlist command to include all the path hdisks for the hdiskpower

11. Run pprootdev on.

12. Reboot the system.

When the system comes up, rootvg should be using hdiskpower devices. Ensure that all device connections to the storage system are established.

   

Bosboot on power disk

When rootvg on power disk, we cannot run bos boot as this is psudo device

Follow the below steps for bosboot on power disk

1. #pprootdev fix ( rootvg will activate on hisks and execute the bosboot

2. #pprootdevfixback ( Again rootvg will activate on power disk)

Audit Files in AIX

/var/adm/sulog   
/var/adm/lastlog
/etc/inetd.conf   
/etc/passwd   
/etc/security/user   
/etc/security/passwd
/etc/security/last   
/etc/security/audit/config       
ls –al/var/spool/cron/crontabs
Critical files Permissions   
                  (1) ls –lLd /etc
                  (2) ls –lLd /etc/security
                  (3) ls –lLd /bin
                  (4) ls –lLd /usr
                  (5) ls –lLd /var
                  (6) ls –lLd /sbin


cut -d: -f6 /etc/passwd | sort -u | xargs -I {}  -t ls -ld {}/.netrc
cut -d: -f6 /etc/passwd | sort -u | xargs -I {}  -t ls -ld {}/.rhosts   

/etc/hosts.equiv
/etc/ftpusers   
instfix –iv   

Service Process

 To clean Sendmail  command queue .

/usr/lib/smdemon.cleanu   

 To stop tcp/ip daemon

/etc/tcp.clean

To Start NFS Services:

mknfs  -N

If the /etc/exports file does not exist, the nfsd and the rpc.mountd daemons will not be started. You can create an empty /etc/exports file by running the command touch /etc/exports. This will allow the nfsd and the rpc.mountd daemons to start, although no file systems will be exported.

Inetd configuration file
/etc/inetd.conf

/etc/services - information about services, such as port number

Starting and stopping a process:
refresh -p <pid>
refresh -s <subsystem name>

Changing the inetd configuration

    Files
        /etc/inetd.conf
        /etc/services
    Using smit - daemon is recycled automatically upon exit
    Using vi
        restart the inetd daemon so that the new configuration is read:
        refresh -s inetd
    Using chservices to edit /etc/services
        chservices -c  --> changes entries
        chservices -a  --> adds entries
        chservices -d  --> deactivates entries

Boot Process

During Boot Process, the system will  test hardware, loads and runs the operating system, and configures devices.

To boot the operating system, a boot image is loaded  and access to / and  /usr  filesystem is required.

Cold Boot : System is started by turning on the power switch

Warm Boot: System is restarted by shutdown or  reboot command.

Events  occurs on system before it is ready for use.

1.       ROS (Read Only Storage) Kernel init phase. (Problems with the motherboard are checked. It searches   for bootlist and boot image is read into memory and system initialization starts.)

2.       Base device configuration phase.   ( All the devices are configured with cfgmgr )

3.       System Boot phase.(all the lv's are varied on ,paging is started and inittab is processed)

RS6000 uses sound  and graphics to show different phases of the boot process. As soon as you power on the system, an audio beep is produced when the processor is found to be active, the PowerPC logo is shown (or text is presented) when the system memory checking is completed, and device logos are shown for all devices that have a valid address. At the end of the device logo display, if the system ROS is not damaged, an audio beep is again produced.


To clear the boot record 
# mkboot -c  -d /dev/hdisk 

Korn Shell Tips

1.  To erase  ^?^?^?    when typing backspace.

      # stty erase ^?

2.  To activate  esc key functions. To navigate the command line like a vi session
   
       #   set -o vi

While Loop

Execute controlled  while loop .

Shell Tips and Tricks

Command Line Short cuts:

1.  You can edit  previous command/one liner in vi editor simply by pressing  "v". This takes the shell into vi mode.

Eg:      # for i in 0 1
            > do
            >  lspv | grep hdisk$i
            > done

Press  Esc+k

 Press  v

   
Update the Script, Added  2 3 and  press  :wq!  < To save and exit>

Now the command/Oneliner is executed .

To Keep Processor Busy

Q:   How to keep processor busy.

A:   yes > /dev/null

  Above Command will put load on Single Processor Thread.
 To Keep  Mutliple Processor Threads Busy . Run  the above command multiple times.

KDB Commands on AIX.

# echo vnode| kdb

# echo "rqi"  | kdb

# echo "mrq *" | kdb

# echo "ppda *" | kdb


To  View VIO  Server  for VSCSI Disks
      # echo cvai | kdb | grep -i vscsi

To  View VIO  Server  for VFCS  Disks
     # echo vfcs | kdb | grep -i vio

To View  how many Vitrual Process are Active 
        #  echo "vpm" | kdb     

To View Filesystem Details
       # echo vfs | kdb

Perfpmr for AIX Performance Issue

1. Download PERFPMR from  ibm site <Binary Format>

 

2.  Upload the perfpmr to  server in /tmp.

3.  Create Directory   in /tmp. eg : perf71. untar the perfpmr.

      # cd /tmp

   # uncompress  perf71.tar.Z

   # cd  perf71 ; tar -xvf  /tmp/perf71.tar

   # cd /tmp/perf71 ; ls -ltr

      (or)

   # mkdir /tmp/perf71

   # cd /tmp/perf71

   # zcat /tmp/perf71.tar.Z | tar -xvf -

4. Create  another directory in /tmp to collect  perfpmr logs.  Eg:   perfpmrdata

   # mkdir /tmp/perfdata

   # cd /tmp/perfdata

5.  Execute perfpmr.sh   from  perfdata directory. Default it would be running for 600 Seconds (i.e, 10 Mins)

For Completing of below command it would take  18 to 20 Mins in real world.

     

     # cd /tmp/perfdata

     # /tmp/perf71/perfpmr.sh (or) # /tmp/perf71/perfpmr.sh 600

6. Send   perfpmr  logs collected in  /tmp/perfdata to IBM for analysis.

      # cd /tmp/perfdata   

      # cd ..

      # pax -xpax -vw perfdata | gzip -c > pmr#.pax.gz

 More Details can be  found in /tmp/perf71/README  file.

AIX Server Reboot Checklist

1. Check  the rootvg mirrored properly or not.      
           # lsvg -l rootvg

2. Check bootlv  is assigned Properly or not.

3. Check the bootlist and re-run the boot image.
          # bootlist -m normal -o
          # bootlist -m normal <hdisk#>  <hdisk#>
          # bosboot -ad </dev/hdisk#>   (or)       # bosboot -a
         
4. Check Server Configuration and take backup of Server Configuration.

5.  Reboot server.
       # shutdown -Fr