church1e's blog

A repository of information technology questions and answers

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Windows cheat sheet

An assortment of miscellaneous Windows references and commands that are useful to both novice and experienced windows administrators alike.

Solaris SPARC Boot Sequence

Understanding the booting process is important in the sense that you can get a clear idea when a system faces a booting problem and steps involved.

Solaris reconfiguration boot

During a reconfiguration restart, a device hierarchy is created in the /devices file system to represent the devices connected to the system.

Solaris LDOM vs Zones

A Sun Logical Domain (LDom) is a full virtual machine whereas a Solaris zone is a virtual operating system.

SAM-QFS Manager Logging

To generate a SAM-QFS Manager troubleshooting report, run the /opt/SUNWfsmgr/bin/fsmgr_report command to create the /var/tmp/fsmgr.overall.log file.

Solaris SAM and QFS file systems

When it comes to storage, Solaris provides more choices than any other OS. Add a couple of packages and you have a hierarchical storage manager.

How to backup SAM-FS file systems

samfsdump can back up 100,000 files a minute, because it's not backing up the full files, just control data. Meaning restore time is also VERY fast.

Stopping and Starting CDE

The Common Desktop Environment compatible among various workstation manufacturers, provides users with a desktop graphical interface on the Solaris OS

Solaris MultiPathing options

Checking if any of the MPxIO, VxDMP or EMC PowerPath multipathing software is installed and active on a given Solaris system.

Solaris proc commands

These commands can be run against a specific process, but most of them can also be run against all processes on the system.

Oracle lsnrctl commands

The listener process runs on the database server. It receives client requests and manages the traffic of these requests to the database server.

Scanning for new luns

This is a short article on how to rescan newly added luns in Solaris, Linux, AIX and HP-UX operating systems.

Using the OBDiag Utility

The OBDiag utility is an OpenBoot program designed to help the system administrator run extensive hardware diagnostics on a Sun SPARC system.

sadmind daemon vulnerability

In its default configuration sadmind uses a set of clear text Remote Procedure Calls (RPC) to authenticate between two machines.

Oracle background processes

An oracle database is run as an instance. A database server can run multiple instances and each instance is made up of different components.

ZFS versions in Solaris 10

This article describes available ZFS versions, features of each version, and the Solaris release that provides the ZFS version and feature

LVM Logical Volumes

The use of logical volumes is similar to the use of partitions and is accomplished with the same standard commands (mkfs, mount, fsck, df, ...)

LVM Volume Groups

A volume group (vg) is an abstraction layer between block devices and logical volumes. The commands used to manage a volume group start with vg

LVM Physical Volumes

A physical volume (pv) is any block device (a disk, a partition, a RAID device, an iSCSI device, etc.)

Resetting Oracle VM 3.x Agent Password

To facilitate the initial discovery of the Hypervisor part of the setup requires that we set the password for the root user and for the ovs-agent.

Installing Solaris boot blocks

This post discusses how to install the boot block on a Solaris system running either the older UFS file system or the newer ZFS root file system.

Solaris CLI keyboard shortcuts

A short article providing various keyboard shortcuts for command line edit of any commands quick and easily.

vi Quick Reference Guide

All commands in vi are preceded by pressing the escape key. Each time a different command is to be entered, the escape key needs to be used.

Sun Diskless Workstation Boot Sequence

To boot diskless workstations need to determine who they are, locate their boot server, locate their kernel and mount file systems from the server

Sun EEPROM Security

On Sun workstations and servers you can interact with the boot EEPROM (NVRAM) at any time by holding down the STOP (L1) key and pressing the "a" key

Solaris vs Linux differences

The purpose of this document series is to introduce the system and network administration features of Red Hat Linux for Solaris Administrators.

NIS+ Credential Setup

To gain authorisation to change NIS+ databases you need to create your security credentials for the NIS+ principals

Troubleshooting various NFS errors

Identifying and solving a problem is called troubleshooting, which is arguably the most difficult task in any area of computers. NFS is no exception.

UFS snaphots

Basically, a snapshot is read-only copy of a file system (for the purpose of backup).

Clearing Password History in Solaris 10

To ensure the security of passwords on Solaris systems, you need to edit the /etc/default/passwd file to enforce password length and complexity.

Solaris Branded Zones

Branded zones are Solaris 8 or Solaris 9 containers created in a Solaris 10 global zone with BrandZ framework to extend the Solaris zones.

soft links and hard links in Solaris

A link is a pointer to another file or directory. Links provide a mechanism for multiple file names to reference the same data on disk.

Solaris file types

The file type can usually be identified by looking at the first character of the first column of information when using the ls command

Controlling User Disk Space Usage

Quotas let system administrators control the size of UFS file systems by limiting the amount of disk space that individual users can acquire.

Solaris run levels (updated)

A system's run level (also known as an init state) defines what services and resources are available to users.

Renaming Sun Cluster node names

Sometime hostname need to be changed especially when your customer want to make some list of server more orderly and correctly identify your machine

Managing Solaris 10 inetd services

inetadm is used in Solaris 10 to managing inetd services. If you run without any parameters you simply get a list of all services and status

Solaris System log (syslogd) overview

Efficient event log syslog analysis reduces system downtime, increases network performance, and helps tighten security policies in the enterprise.

Disabling SELinux in Oracle Linux 6

In this post, we walk through steps you can follow to check the status of SELinux and also disable it in OEL 6, if it is enabled.

Mounting DFS on Oracle Linux

A short article on how to mount a DFS (distributed file system) on an Oracle Linux 5.11 system.

Solaris service management facility

Under Solaris 10 and OpenSolaris the SMF has been upgraded. There are great new tools to handle the sysadmin work on the services.

Automatic home directory creation

Using the executable maps feature in Solaris automounter we can create an authenticated users home directory automatically if it does not exist.

pfiles versus lsof

Many people install lsof on their system as they know it from Linux. But you have a similar tool in Solaris, namely pfiles.

#man RTFM

RTFM is often used as a response to technical questions. Unfortunately, some folks do not even know how to find the manual, let alone understand it.