Introduction In this article, we are going to learn how to use the Linux ls command in Linux. Basically, ls command is a basic command in Linux used to List files and directories. ls command comes with so many arguments and features like you can sort files and directories by Date, by Size, able to […]
Archives for May 2018
How to recreate Control file in Oracle Database
What are control files? The control file is a binary file that defines the current state of the physical database. The control file is one of the core files at the heart of the Oracle database. Together, this means that the Oracle instance itself is the only means by which the contents of the control […]
Managing Oracle Database Backup with RMAN (Examples included)
Installed with the database, Recovery Manager (RMAN) is an Oracle database client which performs backup and recovery tasks on your databases and automates the administration of your backup strategies. It greatly simplifies backing up, restoring, and recovering the database. The RMAN environment consists of the utilities and databases that play a role in backing up […]
How to create or change or view Boot Device Aliases in Solaris Online
This is a procedure to see what the OpenBoot PROM (OBP) aliases are from a booted system, without having to down the system to the “ok” prompt. These aliases are both the “built-in” and any others that may have been manually created. They are the same aliases seen at the OBP level (at the “ok” […]
How to Check CentOS Version
Knowing the exact kernel version or OS version is sometimes necessary while troubleshooting an issue or providing information to the support team. This post will assist you to determine the OS and kernel version of the CentOS or RHEL system you are running. There are 2 major things to check when it comes to finding […]
Oracle Solaris 11 Zones : New Features
With Solaris 11, Oracle has introduced many new features. This is true with the Solaris zones as well. This post tries to list out the new features introduced in Solaris 11 zones. Oracle Solaris Zones is an OS virtualization feature in Oracle Solaris with a long and distinguished pedigree. One of the most highly adopted, […]
How to recover GRUB (Corrupted boot partition) in CentOS/RHEL 5,6
The problem The system is stuck at the grub> prompt as shown below. How to recover from such situation. The solution When you get above error, in most of the cases you have a corrupted boot partition. 1. To fix the problem execute from grub command line: grub> find /grub/stage1 find /grub/stage1 (hd0,0) Above command […]
Performing Network Diagnostics in Solaris 11 with “network-monitor”
network-monitor is a fault manager daemon (fmd) transport module utility. The network-monitor module: Monitors network resources Reports conditions that might lead to limited or degraded network functionality Generates an ireport on detecting an abnormal network condition Does not diagnose the error condition Does not perform any recovery actions You can use the fmdump command to […]
Solaris 11 : How to monitor network traffic using “ipstat”, “tcpstat” and “netstat” commands
Viewing IP Traffic Statistics with ipstat command Starting with Oracle Solaris 11.2 release, you can use the ipstat command to report statistics about IP traffic. ipstat provides options to gather and report statistics only on IP traffic matching specified source or destination address, interface, and higher layer protocol. For more information, refer to the ipstat […]
Managing network resources in Solaris 11 using “dlstat” and “flowstat”
The 2 important commands to manage network resources in Solaris 11 are “dlstat” and “flowstat”. The post is a short note on the usage of these commands to display and manage network resources. dlstat Command The dlstat command reports runtime statistics about datalinks. The output is sorted in descending order of link utilization. dlstat enables […]