Additional Information On AIX System Administration – IV

# lsfs command gives the following output:

Hd1 – home

Hd2 – USR

HD3 – TMP

HD4 – Root

HD5 – BLV

HD6 – Paging Space (2 types: primary, secondary)

HD7 – Not Found

HD8 – JFS

HD9 – VAR

HD10 – MNT

HD11 – admin (available in AIX V 6.1)

LED code 0c0 means successful completion of dump.

To view extended permissions, command used is:

# ls –e <filename>

Command used to set tty port for bidirectional mode:

# share <port attributes>

Commands used to setup quota for file system for end users are:

# vi /etc/<file system>

# edquota /<file system> <username>

# quotaon <file system>

# quotaon /<file system>

To initiate system dump, command used is:

# sysdumpstart –P (for primary)

# sysdumpstart –S (for secondary)

SNAP is generally used to gather system information.

Some of the SNAP commands are:

# snap –a

# snap –g

# snap –D

Image.data contains information about VG’s and LV’s.

Bosinst.data contains information about installation flow control.

To view mksysb tape and to restore particular file from mksysb tape, commands used are:

# tctl –f /dev/<tape drive name>

# restore –tvf /dev/<tape drive name>

# restore –xvf /dev/<tape drive name>

For eg:

# tctl –f /dev/rmt0

# restore – tvf /dev/rmt0

# restore – xvf /dev/rmt0

Tctl command is basically used to rewind the tape drive.

To list NIM objects, command used:

# lsnim

NIM stands for network installation management.

To see NIM log, command used is:

# nim –o showlog –a full_log = yes –a log_type = logtype NIMclient

Logtype can be boot, script etc.

NIMClient is the hostname / ip address of the client machine.

Sources of this command : IBM AIX Forum

# smit system command is used to change the server time.

# smit date command is used to change system date.

Time synchronization is either done by running time demon or ntp demon.

P5 family:

1. Entry :

i.      P5 510

ii.      P5 520

iii.      P5 550

1. Mind Range :

i.      P5 570

1. High End :

i.      P5 575

ii.      P5 590

iii.      P5 595

Physical Volume (PV) id can be found in Cuat ODM class.

Device in defined state means there is an entry in ODM class CuDV.

Procedure to change bootlist from hdisk0 to hdisk1:

Go to SMS mode by pressing F1 and change the bootlist by running the following command:

# bootlist –m normal hdisk0 hdisk1

If a machine keeps rebooting and repeating POST, it means either there is invalid bootlist or corrupted BLV or hardware failure of boot device.

More we will discuss about AIX System Administration in the coming posts.

Till then,

Happy Learning !

Additional Information On AIX System Administration – III

• To check block size of a tape drive, command used is tcopy. Tcopy command is used to copy a magnetic tape.
• ‘No Virtual printer defined’ error message means there is no space left in /tmp directory.
• Tall command is basically used for cron command diagnostics.
• While creating a new user account with mkuser command, /etc/security/mkuser.default will setup the attributes without any flags for the new user.
• chsec command is used to reset the failed login count. Command used is:

              # chsec –f /etc/security/lastlog –s <username> -a unsuccessful_login_count = 0

• diag command is used to log hardware repair entry in errorlog. To run this command, administrator needs to shutdown (# shutdown -m) the system and reboot in single user maintenance mode and then run the diag command.
• Kdb command will debug the AIX kernel. It basically display system images for examining a dump.
• LED code 0c54 means AIX installation is still in progress.
• With mkvg command we can make use of –d flag to limit VG spacing across number of PVs.
• Dynamic kernel means devices can be added / deleted without rebooting the server.
• Command to create a boot logical volume:

              # bosboot –ad /dev/hdisk0

• # smit update_all command will update to next modification level. Other commands are :

             # smit update_by_fix

             # smit disk_install_all

• To increase size of errorlog file, command used is:

             # errdemon –s ‘size in bytes’

• Syntax to hold and release a print job:

             # qhld -# (job number)

             # qhld –r (job number)

• Command to move job to another queue:

             #qmov –m queuename -# (job number)

• Command to change priority of a print job and listing of priority:

             # qpri -# (job number) –a (priority value)

• To enable / disable a printer, command used is:

             # enable

            # disable

Happy Learning!