Sometimes AIX Admin need to be sure that the System is connected to different SAN Switch for more redundancy and stability.
Follow below steps to check SAN Switches from AIX Side:
# lsdev |grep fc fcs0 Available 24-T1 Virtual Fibre Channel Client Adapter fcs1 Available 24-T1 Virtual Fibre Channel Client Adapter # lsattr -El fscsi0 |grep -i scsi_id scsi_id 0xdf0707 Adapter SCSI ID False # lsattr -El fscsi1 |grep -i scsi_id scsi_id 0xde0718 Adapter SCSI ID False
You can use the following command to change Specific string on all files under specific directory:
find /u01/directory -type f | xargs perl -pi~ -e ‘s/oldtext/newtext/g;’
Tested on Linux & AIX
Ref:
https://blogs.oracle.com/rammenon/recursively-replacing-a-string-in-all-files-in-a-directory-linux
Hello Everybody …
Sometimes for performance recommendations or redundancy solutions, you will need to change some parameters on fibre card, like fc_err_recov & dyntrk
TEST_SERVER#lsattr -El fscsi0 attach none How this adapter is CONNECTED False dyntrk yes Dynamic Tracking of FC Devices True+ fc_err_recov delayed FC Fabric Event Error RECOVERY Policy True+ scsi_id Adapter SCSI ID False sw_fc_class 3 FC Class for Fabric True Continue Reading...
Hello Everybody,
The following lines are a for loop script to display disks info @ AIX System (Disk Name, Disk Unique ID, Disk Size in MB) and of course you can customize the data by add more columns:
Sometimes when you try to mount file system (NFS) you will get the following Error:
#mount -o rw server1:/dir /bk mount: 1831-008 giving up on: server1:/dir vmount: Operation not permitted.
Configure DNS on AIX
Add the DNS server(s) to the /etc/resolv.conf configuration file:
vi /etc/resolv.conf
IBM AIX has a 3 Edition (Standard, Express, Enterprise) and you can check the installed edition on you server by the following command:
/usr/sbin/chedition -l
and you can check the difference between each edition from the following Link:
http://www-03.ibm.com/systems/power/software/aix/v61/editions.html
Use the following command to rename a device:
# rendev -l hdisk4 -n hdisk53
where the ‘hdisk4’ is your device and ‘hdisk53’ is the new name.
HINT: The device must be free
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
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