After a customer had performed some bad edits on various LDAP configuration files, users were locked out and unable to access the system. Root could still login however.
I logged in as root, and rather than mess with various config files, eg under /etc/pam.d, ran this command to disable LDAP authentication and enable “normal” authentication using /etc/shadow:
– Scan New Hardware:
scsi-rescan
rescan-scsi-bus.sh –forcerescan
– For Physical Volumes:
pvdisplay
pvscan
pvcreate /dev/sdb
– For Volume Groups:
vgdisplay
vgscan
vgextend VGNAME PVNAME
lvextend -L+50G LVNAME
resize2fs LVNAME
Some times, when you shutdown LPAR, it’s appear inactive but there is some Cores Allocated to this LPAR and overall the HMC doesn’t see the Free cores.
so, here is the solution for this issue :
– First, login to HMC Console (Command Line)
– write the following Command to get the System name which contain the LPAR: Continue reading
use the following command to remotely eject the tap from a tap device to minimize your time & safe your data:
#mt offline
it will eject the tap from the default device tap unit “rmt0”.
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
Continue reading
Information about which PPs that are stale and which PVs are missing within a VG. The LVM and SCSI driver reserves somewhere between 7-10% of the available disk space for LVM maps, etc.
Ref:
http://www.datadisk.co.uk/html_docs/hp/aix_lvm.htm
Information about all the LVs and PVs within a VG. The first 64K of a PV is reserved for this area – defined in <sys/bootrecord.h>.
The VGDA consists of
You can find below the meaning of each parameter on Volume Group Characteristics (the output from lsvg vg command):