AIX QUICK SHEET

Filesystems

/dev/hd1 /home
/dev/hd2 /usr
/dev/hd3 /tmp
/dev/hd4 / root
/dev/hd5 BLV (Boot Logical Volume)
/dev/hd6 Paging space
/dev/hd8 JFS2 log
/dev/hd9var /var
/dev/hd10opt /opt
/dev/hd11admin /admin New in 6.1
livedump /var/adm/ras/livedump New in 6.1 TL3
/proc procfs pseudo filesystem
Remove mount point entry and the LV for /mymount
rmfs /mymount (Add -r to remove mount point)

Grow the /var lesystem by 1 Gig
chfs -a size=+1G /var

Grow the /var lesystem to 1 Gig
chfs -a size=1G /var

Find the file usage on a fi lesystem
du -smx /

List filesystems in a grep-able format
lsfs

Get extended information about the /home filesystem
lsfs -q /home

Create a log device on datavg VG
mklv -t jfs2log -y datalog1 datavg 1

Format the log device just created
logform /dev/datalog1

Kernel Tuning

- no is used in the following examples. vmo, no, nfso, ioo, raso, and schedo all use similar syntax. lvmo uses di fferent syntax.

Reset all networking tunable to the default values
no -D (Changed values will be listed)

List all networking tunable
no -a

Set a tunable temporarily (until reboot)
no -o use isno=1

Set a tunable at next reboot
no -r -o use isno=1

Set current value of tunable as well as reboot
no -p -o use isno=1

List all settings, defaults, min, max, and next boot values
no -L

List all sys0 tunables
lsattr -El sys0

Get information on the minperm% vmo tunable
vmo -h minperm%

Change the maximum number of user processes to 2048
chdev -l sys0 -a maxuproc=2048

Check to see if SMT is enabled
smtctl

Directory containing tunables settings
/etc/tunables/

ODM
Query CuDv for a specific item
odmget -q name=hdisk0 CuDv

Query CuDv using the \like" syntax
odmget -q "name like hdisk?" CuDv

Query CuDv using a complex query
odmget -q "name like hdisk? and parent like vscsi?" CuDv

Devices
List all devices on a system
lsdev

List all disk devices on a system (See next item for a list of classes)
lsdev -Cc disk

List all customized (existing) device classes (-P for complete list)
lsdev -C -r class

Remove hdisk5
rmdev -dl hdisk5

Get device address of hdisk1
getconf DISK DEVNAME hdisk1 (or) bootinfo -o hdisk1

Get the size (in MB) of hdisk1
getconf DISK SIZE /dev/hdisk1 (or) bootinfo -s hdisk1

List all disks belonging to scsi0
lsdev -Cc disk -p scsi0

Find the slot of a PCI Ethernet adapter
lsslot -c pci -l ent0

Find the (virtual) location of an Ethernet adapter
lscfg -l ent1

Find the location codes of all devices in the system
lscfg

List all MPIO paths for hdisk0
lspath -l hdisk0

Find the WWN of the fcs0 HBA adapter
lscfg -vl fcs0 | grep Network

Temporarily change console output to /console.out
swcons /console.out -> (Use swcons to change back.)

Get statistics and extended information on fcs0
fcstat fcs0

Tasks
Change port type of HBA (This may vary by HBA vendor)
rmdev -d -l fcnet0
rmdev -d -l fscsi0
chdev -l fcs0 -a link type=pt2pt
cfgmgr

Mirroring rootvg to hdisk1
extendvg rootvg hdisk1
mirrorvg rootvg
bosboot -ad hdisk0
bosboot -ad hdisk1
bootlist -m normal hdisk0 hdisk1

Mount a CD/DVD ROM to /mnt

mount -rv cdrfs /dev/cd0 /mnt -> (for a CD)
mount -v udfs -o ro /dev/cd0 /mnt -> (for a DVD)
-> Note the two di erent types of read-only flags. Either is Ok.

Create a VG, LV, and FS, mirror, and create mirrored LV

mkvg -s 256 -y datavg hdisk1 (PP size is 1/4 Gig)
mklv -t jfs2log -y dataloglv datavg 1
logform /dev/dataloglv
mklv -t jfs2 -y data01lv datavg 8 -> (2 Gig LV)
crfs -v jfs2 -d data01lv -m /data01 -A yes
extendvg datavg hdisk2
mklvcopy dataloglv 2 -> (Note use of mirrorvg in next example)
mklvcopy data01lv 2
syncvg -v datavg
lsvg -l datavg will now list 2 PPs for every LP
mklv -c 2 -t jfs2 -y data02lv datavg 8 -> (2 Gig LV)
crfs -v jfs2 -d data02lv -m /data02 -A yes
mount -a

Move a VG from hdisk1 to hdisk2

extendvg datavg hdisk2
mirrorvg datavg hdisk2
-> Wait for mirrors to synchronize
unmirrorvg datavg hdisk1
reducevg datavg hdisk1

Find the free space on PV hdisk1
lspv hdisk1 ! (Look for \FREE PPs")

Additional Information
http://publib.boulder.ibm.com/infocenter/systems/scope/aix
http://www.redbooks.ibm.com/portals/unix
Display error codes can be found in the \Diagnostic Information for Multiple Bus Systems" manual

About this QuickSheet
Created by: William Favorite (wfavorite@tablespace.net)
Updates at: http://www.tablespace.net/quicksheet/
Disclaimer: This document is a guide and it includes no express warranties to the suitability, relevance, or compatibility of its contents with any specfi c system. Research any and all commands that you inflict upon your command line.
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