Operating System Tools Several operating system tools are available to help you assess database performance and determine database requirements. In addition to providing statistics for Oracle processes, these tools provide statistics for CPU usage, interrupts, swapping, paging, context switching, and I/O for the entire system. Common Tools The following sections provide information on common tools: […]
Tuning for Oracle Database on UNIX Read More »
Hot swapping of a failed disk is fairly straight procedure if the disks are regular SCSI disks, but for the Fibre Channel (FC) disks we should follow different procedure for hot swaping. Below specific procedure should be used when replacing one of the internal disks in a system with internal fibre drives (Sun Fire 280R,
ossec-reportd is a program to create reports from OSSEC alerts. ossec-reportd accepts alerts on stdin, and outputs a report on stderr. Note Since ossec-reportd outputs to stderr some utilities like less will not work if you do not redirect the output. End the ossec-reportd with 2>&1 to redirect stderr to stdout. more or less can
OSSEC v2.0 commands Read More »
This document attempts to provide answers to all study points on the RHCE and RHCT Exam Preparation Guide in a single-page (and thus, printable) format. This is not a “brain dump” or an attempt to cheat the RH302 exam in any way. These are just my self-study notes. Use them at your own risk. Other
RHCE "Cheat Sheet" Read More »
The following example shows output from the config terminal command: switch# config terminal Enter configuration commands, one per line. End with CNTL/Z. switch(config)# Configuration Mode Commands and Submodes Here is a list of configuration mode commands: switch# config terminal Enter configuration commands, one per line. End with CNTL/Z. switch(config)# aaa Configure the aaa arp
Cisco MDS Series Switch CLI – Config Mode Commands Line Interface Read More »
echo “- – -” > /sys/class/scsi_host/hostX/scan eg. echo “- – -” > /sys/class/scsi_host/host0/scan echo “- – -” > /sys/class/scsi_host/host1/scan
How to see/scan new EMC SAN lun/disk in RHEL 5 Read More »
DS_300B:admin> chassisshow POWER SUPPLY Unit: 1 Time Awake: 2 days FAN Unit: 1 Time Awake: 2 days FAN Unit: 2 Time Awake: 2 days FAN Unit: 3 Time Awake: 2 days CHASSIS/WWN Unit: 1 Header Version: 2 Factory Part Num: 40-1000165-14 Factory Serial Num: ALJ7852H0F5 Manufacture: Day: 8 Month: 1 Year: 2012 Update: Day: 22
How to obtain the serial number (SN) of a Brocade switch by command? Read More »
Solaris fault manager overview One of the coolest features in Solaris 10 in the fault management service. Fault management allows system software to send telemetry data to the fmd(1m) daemon, which then diagnoses the problem, and takes action (e.g., offlining a faulty components and logging an error with FMRI/UUID information to syslog) based on the
Solaris fault manager overview Read More »
Today I have resize all Linux partition and find that my swap is not mounted. I have make swap again and its working fine. Before resize of partition : alienvault:/var/log# df -hFilesystem Type Size Used Avail Use% Mounted on/dev/sda1 ext3 95G 74G 16G 83% /tmpfs tmpfs 1008M 0 1008M 0% /lib/init/rwudev tmpfs 10M 616K 9.4M
Linux : swapon: /dev/sda5: Invalid argument Read More »
Method #1: You can make file readonly by removing users’ write permission for a file. Under Linux and UNIX user cannot remove or modify file if they don’t have a write permission. You can use normal chmod command for this purpose. Method #2 : You need to use chattr command which changes the file attributes
Linux Write protect a file Read More »