Menu

aix

ibm05

Disk replacement on AIX

, , , , 0

This is documentation of root file system disk replacement

 

Unmirror failed disk (ex: hdisk2)

#unmirrorvg rootvg hdisk2

 

Logical volume has single copy so we need to remove it and recreate it on the good disk (if necessary)

#umount /var/adm/ras/livedump

#umount -f /var/adm/ras/livedump

#rmfs /var/adm/ras/livedump

#chpv -c hdisk2

#reducevg rootvg hdisk2

#rmdev -dl hdisk2

 

Ready for HW to be replaced

################  Prior to Physical Disk Removal

>>SERVER REPORTED MULTIPLE SC_DISK_ERR3 ON HDISK2.

>>REPLACE HDISK2 AT LOC:U789D.001.DQD09H5-P3-D3.

 

Steps to replace the faulty disk

#diag

#Task Selection

#Hot Plug Task

#SCSI and SCSI RAID Hot Plug Manager/RAID Hot Plug Devices

#Select adapter

#Commit

#Remove

 

Put in the new replaced disk

################  After Physical Disk Removal task is completed

#cfgmgr

#extendvg rootvg hdisk2

#mirrorvg rootvg hdisk2 ==> this command will take sometime to complete.

#bosboot -ad hdisk2

#bootlist -m normal hdisk1 hdisk2

#bootlist -m normal -o ==> to validate the bootlist.

 

################ Create dump on secondary disk

# mklv -t jfs2 -y livedump rootvg 1 hdisk2

# crfs -v jfs2 -d /dev/livedump -m /var/adm/ras/livedump -A yes

 

ibm04

User management on AIX

, , , , , , 0

User management on AIX

 

Check user’s unsuccessful login counts

su – root

lsuser -a unsuccessful_login_count <userid> 

 

Reset unsuccessful login count

chsec -f /etc/security/lastlog -a unsuccessful_login_count=0 -s <userid>

 

Unlock account

chuser account_locked=false <userid>

 

To lock an AIX account

chuser account_locked=true <userid>

 

Check if user is locked

lsuser <userid>

 

How to reset the password on AIX when login fails

 

this would be mainly due to password expire or account expire…!

 

Check user password history default by this command

grep -p ^default /etc/security/user | grep histsize

 

Change the password history size by this command (input the # history in digit)

chuser histsize=”#” “userName”

 

Change the password history to 0 so it doesn’t say invalid password, even if it’s already been used previously

chuser histsize=0 “userName”

 

Change the password by this command

su “userName”

passwd

 

Change the password history size back to the original and/or default size

chuser histsize=”default_#” “userName”

 

Set the password so that they never expire by this command

chuser maxage=0 “userName”   –   user can login by changing their password

chuser expires=0 “userName”   –   user cannot login without the help of administrator

 

ibm03

Network Configuration on AIX

, , , , 0

How to manage network configuration on AIX

 

How to add & remove etherChannel

1. Type smitty chinet and select the interface belonging to your EtherChannel. Change the Current STATE attribute to detach, and press Enter.

2. On the command line type smitty etherchannel.

3. Select Remove an EtherChannel and press Enter.

4. Select the EtherChannel that you want to remove and press Enter.

 

How to check ethernet bonding status

entstat -d “_adapter_name_”

 

How to check fiber channel status

fcstat “_fc_adapter_name_”

 

How to check device information

lscfg -vpl “_adapter_name_”

 

How to add or remove ethernet interface to etherChannel

/usr/lib/methods/ethchan_config

-a to add

-b to add as backup

-c to change attribute

-d to delete

-f to failover

 

Example:

/usr/lib/methods/ethchan_config -a ent2 ent1

 

 ent2 etherchannel

 ent1 adapter to add

 -a Flag to use for adding an adapter

 

 

How to unconfigure / remove / replace device

smitty -> devices -> PCI Hot Plug Manager -> 

 

How to install unconfigured or replaced parts

cfgmgr

 

How to remove device completely

rmdev -Rdl fcs1 (or device name you prefer instead of fcs1)

 

ibm02

Tips & Tricks for AIX

, , , , 0

Tips & Tricks on AIX

 

How to get service console on AIX

diag

OR

smitty

 

Check machine type and firmware on AIX

lsmcode

 

Stop aix

shutdown -F 0

 

Check cluster configuration on AIX

scstat or cluster status

 

ibm00

Check cluster and failover in AIX

, , , , 0

Check cluster and failover in AIX

 

Here’s one utility command you can use to check clustering…   smitty!

smitty hacmp

 

To stop cluster

smitty hacmp

System Management (C-SPOC) > PowerHA SystemMirror Services > Start/Stop/Show

 

To failover, failback resources

smitty hacmp 

System Management (C-SPOC) > Resource Group and Applications > Move Resource Groups to Another Node

 

To look into cluster node status

lscluster -m

 

To look up cluster configuration

lscluster -c