Encrypting a tar file using openssl
cloudibee In some cases, you may have to send your datacenter’s passwd information to some of your collegues. Instead of sending them in plain text, you can use tar & openssl…
Linux
Loadbalancer
A good presentation from F5 explaining all features of Loadbalancer : http://www.f5.com/flash/product-demo/
Download using wget
You can use “wget” on Linux machine CLI to download files from http or ftp sites. Proxy configuration can be done for wget by exporting environment variables Initialize proxy :…
Netapp : nfsstat command
This command displays the NFS and RPC statistics of filer. The command can be used to find the performance bottlenecks in NFS environment. This shows the metrics for each nfs…
How to resize Netapp Qtree Quotas .. ?
1) Get the quotas file from netapp # rsh unixfoo-nfs1 rdfile /etc/quotas > /tmp/quotas 2) Edit the quotas file and change the quota for the required qtree. # vi /tmp/quotas…
Useful AIX tips
Display paging space details # lsps -aPage Space Physical Volume Volume Group Size %Used Active Auto Typehd6 hdisk1 rootvg 8192MB 1 yes yes lv# Memory module details : # lscfg…
Linux RPM database recovery
Sometimes you may get the below error while running “rpm -qa” or any other rpm listing command. This error suggests that the RPM db is corrupted and you need to…
Increasing swap performance
If your Linux machine is configured with several swap partitions, the default trend is to use of one partition at a time. Once one swap partition has been full the…
Netapp deduplication
Netapp deduplication – is a new technology to control the rate of data growth. The average UNIX or Windows disk volume contains thousands or even millions of duplicate data objects.…
HPUX tips
1) Find number of processors in the machine. # /usr/sbin/ioscan -k -C processorH/W Path Class Description===============================160 processor Processor166 processor Processor# 2) Find the model of the hardware # model9000/800/L2000-44# 3)…
AIX performance monitoring : filemon
“filemon” command monitors the performance of the file system, and reports the I/O activity. The I/O activity monitored is based on the time interval during which the filemon is run.…
HP-UX : Kernel Parameter Recommendations
Below is the list of commonly recommended HPUX kernel parameters. But this may vary based on your application need. # Parameter Value bufpages 0 # on HP-UX 10.X create_fastlinks 1…
HPUX : Identify 32-bit or 64-bit kernel
Here are the steps to identify whether you are running a 32-bit or 64-bit kernel. getconf KERNEL_BITS will return whether it is a 32 bit or 64 bit. hpux1 #…
Oracle’s Direct NFS
Direct NFS (DNFS) is an Oracle Database 11g implementation of NFS client that runs as part of the Oracle Database 11g engine. Through this integration, the Oracle database engine optimizes…
Few /proc files
/proc/cmdline – file has the parameters passed to the kernel while the system boots-up. /proc/kcore – This file represents the physical memory of the system and is stored in the…