Confused by the lights on your Sky Q Hub when glowing solid, flashing or even off? This article explains and how to troubleshoot common problems.
If your Sky Q TV apps are missing or the app freeze 15-30 seconds after starting, then use these steps to try and fix the issue.
Using the pkg history command you can take a look back and see what happened on your image.
Using truss/strace is a simple method to verify if a running process is performing any activity or is in a hung state whilst making a system calls.
netstat is a useful tool for checking your network configuration and activity. It is in fact a collection of several tools lumped together.
This article describes how to determine ZFS device failure types, clear transient errors, and replace a device.
If a device cannot be opened, it displays as UNAVAILABLE in the zpool status output.
Every Linux system has three options when clearing cache without interrupting any processes or application services.
The procedures in this article explain how to recover your data if the system disk fails on a NetBackup master server.
When installing patches on Solaris, you may often see error codes or Exit/Return codes when the patch installation fails. These are the return codes.
The scope of this post is to provide a procedure resolving a common issue whereby NetWorker does not recycle tapes due to index corruption.
You may also see the error after the NetWorker client upgraded with the same host name which created a duplicate NSR peer information for the client.
This article provides a basic overview of SAM-FS/QFS Components, basic SAM-FS/QFS Troubleshooting and a list of SAM-FS/QFS resouces.
This article is designed to walk you through common VxVM problems allowing you to troubleshoot them.
Run keys are part of the registry, a hierarchical database housing settings that run the Windows operating system, its services and applications.
The Ping of Death attack, first seen in 1996, is achieved using the Internet control message protocol, or ICMP (hence the name ?Ping of Death?).
How do we know how is a storage device mapped to local device? Simple checkout /etc/path_to_inst.
The majority of the VxVM utilities use a common set of exit codes, which allow programs to react to specific problems detected by the utilities.
Solaris Fault Management Architecture (FMA) introduces a new software architecture and methodology for fault management across Sun's product line.
A simple procedure which shows how to identify a Sun StorEdge T3 / T3+ Arrays existing password if it has been forgotten.
This error can be caused by either no space available for /var or that the /var/adm/utmpx file itself is corrupt.
The logging service is configured by the NSR auditlog RAP resource. The NSR auditlog resource is created by default and cannot be deleted
The NSR tunnel resource enables NetWorker clients and storage nodes to communicate with a NetWorker server over a firewall
Run Control (rc) scripts are used to start and stop processes at boot up and shutdown.
The prstat statistics utility shows a top-level summary of the processes that are using system resources currently.
The ZFSSA offers status and diagnostic information on various levels, and its logs are one of the first resources to consult.
If you need to adjust the size of the swap volume after installation on an active system, review the following steps. See CR 6765386 for more info
Veritas Volume Replicator aides in an effective maintain a consistent copy of application data at one or more remote locations via data-replication
In preparing to move the NetBackup image catalog from one location to another, it is recommended to perform a full catalog backup beforehand.
Renaming a zpool is not as intuitive as I would expect, but it is still pretty simple. However, we can accomplish this through a three step process.
Ever needed to obtain the serial number of a system without physically inspecting the hardware. Here's some command-line examples for various systems.
Performing a Solaris root password recovery when neither local cd/dvd or jumpstart (netinstall) options are avilable.
Distinguishing between a failed disk and a failing disk may save you time when you need to replace it.
Veritas Cluster Server?s Low Latency Transport (LLT) protocol provides fast, kernel-to-kernel communication and monitors network connections.
The ability to resume an interrupted zfs send/receive data stream which is a representation of a snapshot is now part of Oracle Solaris 11.4
Using Shadow Migration is very easy; for example, we could migrate shared ZFS and UFS file systems through NFS or even through a local file system
Frozen media is the media that NetBackup does not use for backups. NetBackup stops directing the backups and the archives to frozen media.
Applications or servers can sometimes fail with an error indicating that there are too many open files for the current process. Most of the time.
After changing the IP address of a SAM-QFS server clients are unable to mount the SAM-QFS file systems.
Whilst it is allowed to repair a mounted SAM-FS file system, you are encouraged to run the command on an unmounted file system.
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.
When mounting or unmounting a Sun QFS shared file system, the order in which the Solaris OE is mounted or unmounted is important.
gunzip: File too large / gzip: Value too large for defined data type
A simple procedure to recreate /dev/null on a Solaris system using the mknod command to create a special character device.
There is a rather nasty bug in Vxfs 3.3.1 that appears to manifest itself into a backup problem.
This article shows how to gracefully shut down Solaris 9 from within the CDE, and from the Console Login.
The OBDiag utility is an OpenBoot program designed to help the system administrator run extensive hardware diagnostics on a Sun SPARC system.
An update to rkhunter will fail with Invalid WEB_CMD configuration option: Relative pathname: "/bin/false"
How to verify the required Veritas NetBackup 7.0 daemons and services are up and running on a master or media server.
A collection of troubleshooting tps for the Veritas File System (VxFS).
A collection of troublshooting tips for the raid manager software for controlling the Sun StorEdge A1000, RSM200, A3x00 storage arrays.
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.
This tape usually ends up in ready for writing or state. At this point there appears that nothing we do can unmount or free the drive
To verify the integrity of the NetWorker client file indexes use the nsrck command and to verify media database use nsrim.
This document provides the necessary steps to allow Backup Administrators to Migrate or Consolidate several Legato NetWorker servers.
Use ascdcode to translate ASC/ASCQ status codes into verbal messages without any documentation.
This FAQ should answer some of the basic questions on how failovers work on the StorEdge T3 array
The psradm utility changes the operational status of processors. The legal states for the processor are on-line, offline, spare, Faulted, and no-intr
This document is designed specifically to aide the resolution when you encounter issues with the Samfs/QFS recycler.
An article designed specificall y to aide the resolution when you encounter issues with the SAM-QFS stager.
This post simply provides the steps necessary to restart the SAM-FS stager cleanly
A procedure to recovering from the loss or corruption of a Solstice Backup servers critical files including the index, media index, and resource files
Use the following procedure to configure a Solaris system to utilise fabric tape.
Here are the steps necessary to ensure successful switch-over of a Sun Storage Array (SSA) between two Sun systems.
Sometimes re-registering VSS core components can fix errors and allow NetWorker backups to continue successfull
Solstice DiskSuite is a software product that enables you to manage large numbers of disks and the data on those disks.
Solaris will try to paste the top most thing in your clipboard when you click your middle mouse button.
Simply put, the software takes a picture, and then tracks any changes made since the copy is made through the use of a bitmap.
To restart the Automated Cartridge System Library Software (ACSLS) Software, simply perform the following steps.
This post provides brief differences in the log files used for System Logging of the most common versions of UNIX.
This article provides a quick guide to the supported disk configuration on a Sun StorEdge A5x00 storage array.
This diagram is derived from the Veritas Volume Manager (VxVM) Performance and Tuning course notes. Additional state paths have been added.
There are two way to change block size to get quickly synchronized disks in mirrored system
Here, we've assembled 10 fast n' easy tweaks for any PC that break the factory mold and improve performance.
During a test build of Ubuntu 15.10 I suddenly received the following error when refreshing the packages from the repository.
The truss command is used to trace system and library calls on a Sun or Sequent system. Which is similar to strace on Linux based systems
Under Solaris 10 we use the svcs command to provide information about services, including their status.
Over the years I have seen some of the most common NFS Error/Issues which occurs in very common now and then to most of Solaris system admins.
This a quick cheat sheet of the commands that can be used when using Veritas NetBackup
This is a short article that provides some basic pointers to troubleshooting Solaris 11 network interfaces.
A simple article that provides a listing of log files needed in order to troubleshoot Veritas NetBackup and Oracle RMAN isssues
This article simply provides a list of commands to allow Solaris to detect newly added devices.
This is a simple post providing the necessary steps on how to turn on Statistic logging on EMC Unisphere
How to turn on Statistic logging on EMC Navisphere
How to turn on statistical and data logging on EMC Unisphere for VNX
How to turn on data logging on EMC Unisphere to collect .NAZ files
How to turn on Data logging on EMC Navisphere Express
There can be multiple reasons why you cannot join a CIFS server to a domain.
Depending on the OS you are running determinas which command and options to use in your testing.
Identifying and solving a problem is called troubleshooting, which is arguably the most difficult task in any area of computers. NFS is no exception.
Clearing a continually lit ZFSSA fault LED after making sure there are no faults remaining on the system.
These commands work whether or not the file system is mounted.
Learn how to install Nagios network and server monitoring on Solaris 11
A simple how-to article providing the steps necessary to locate a failed compaonent of a ZFS Storage Appliance using both the BUI and CLI
A simple procedure to replace a failed SCSI disks which is mirrored with Solstice DiskSuite without the need to reboot the Solaris server.
To solve this problem, try one or more of following commands on the global zone until the zone state changes to Installed.
No matching devices for save of client NetWorker_Server; check storage nodes, devices or pools.
Mozilla has recently announced Mozilla's Firefox web browser won't support the FTP protocol from Firefox 90 onward.
This article provides the simple steps to enable SNMP on Solaris 10 and Solaris 11 systems.
Almost all events on Hyper-V are logged in Event Viewer, however they are divided between different event logs.
This article provides a list of possible causes and resolutions for error messages that are related to NetWorker server authorization issues.
Managing a remote system using the Computer Management console, you must launch the console with an account that has administrative credentials.
This article describes the purpose and function of the pathownerignore file
In order for NetWorker to determine the volume to use, the pool criteria have to match exactly.
NetWorker provides the 'Inactivity Timeout' attribute in the Group resource for the ability to timeout and abort client savesets.
This article helps to determine which version of NetWorker VBA is running to help open Service Requests and troubleshoot issues.
AeroSnap is a feature of some window managers to anchor the windows to the screen edges.
Best practices suggest that auto-cleaning within NetWorker be turned off and allow the library to perform that task
This article provides the simple steps needed to gather SPCollects from the EMC Navisphere.
This article provides the simple steps needed to gather the SPCollects from the Unisphere Maager.
If you have root access to the OS you can use the ipmitool to reset the root password on the ILOM
When the cache becomes full, events are removed from it and placed in the repository file, which uses the following naming convention
As new events are created, older events are written to a log file called the PEM log.
To resolve the issue and add volumes to an IBM3494 Silo, you must remove any leading zeros from the string stored in the resource database
With Solaris 9, the volume Management daemon (vold) was changed so that it automatically attempts to manage all removable media devices.
This post provides an example of how to remove VxVM from a Solaris root disk. The operating system is mirrored between the two devices.
irst set the debug level to display output for analysis. This can be done at the command line level or from within the GUI.
The Sun Explorer utility gathers information and creates detailed snapshots of a systems architecture and configuration.
The Solaris explorer gathers system diagnostic data and creates an archive suitable for Oracle support analysis.
Forcing a panic of an unresponsive guest domain is simple by issuing an 'ldm panic-domain' from the primary domain.
The NetBackup Catalog is the internal database that contains information about backups and configuration and should be protected regulary.
The NetBackup Catalog is the internal database that contains information about NetBackup backups and should be protected.
It's not uncommon to perform this task. In fact NetWorker does it everytime you run the NetWorker support nsr_support/nsrsup commands.
Beginning with NetWorker 6.2, Legato introduces a new organisation of NetWorker's configuration database from nsr.res into nsr/res/nsrdb.
With Solstice Backup 6.1 a new parameter savegroup parallelism was introduced for load balancing reasons.
CDI was introduced with NetWorker 7.4SP3 to provide a generic passthrough solution for all operating systems to control tape and status collection.
NetWorker Module for Oracle in Real Application Cluster (RAC) licensing has changed between 7.4.x versions.
When using AD mode for CIFS access, the data domain system clock time cannot differ by more than five minutes.
This article lists steps on how to resolve data domain connection failures with OST allowing storage partners to deliver backup and recovery solutions
Only a filesys clean operation reclaims the physical storage used by files that are deleted and that are not present in a snapshot.
This article describes how to collect and use network throughput measurements which are used for evaluating the performance of specific services
If the CloudBoost appliance encounters a failure you must deploy a second CloudBoost appliance to restore the metadata from backups in the cloud.
To troubleshoot a recovery issue configure the Recovery resource in NMC to display greater detail in the log file and retry the recovery.
Using the NetWorker recovery wizard you can restore files from the cloud.
The information presented in this Process Flow is specific to troubleshooting situations where EMM is reported as being down.
When trying to create NMM clients using NMC client wizard, the wizard does not show all valid savesets for one or more Microsoft Applications.
The dbgcommand allows capturing debug info on the fly without restarting NetWorker processes/services.
The RAP option tracks the history of additions, deletions, and modifications to a NetWorker resource or resource attribute.
The daemon.raw file is able to be output to a readable daemon.log format by using a command line function.
IP network multipathing (IPMP) provides a mechanism for building redundant network interfaces to guard against failures with network interfaces.
Legato NetWorker provides the Inactivity Timeout attribute in the group resource for the ability to timeout and abort client save sets.
nsrexecd starts as a service under the SYSTEM account which normally does not have the correct security credentials to access the CIFS share.
Legato NetWorker EVAL licenses do not have limits
syslog is an important facility need in all enterprises. We as sysadmins look at syslogs as a critical source to troubleshoot performance issues
There has been more than one instance when the Sun ILOM was not responsive to commands or were throwing errors
Setting the "ServerName" directive globally in Apache2 is no black art. Here we list the default locations for various platforms and version.
A short article on troubleshooting Solaris LDoms. Most LDom issues can be easily resolved by looing at the error messages.
If you have a file and need to know the package that installed the file on the system then using pkgchk should help.
If you have a file and need to know the package that installed the file on the system then using pkgchk should help.
When obtool encounters an error, it reports an exit code with a brief description.
In the event of drastic file permission or ownership changes, it is possible to restore the original permissions of the file(s)
This procedure addresses how to reduce the index size by removing the oldest full save set and its dependencies.
This document describes the various RM6 error codes returned by the Series 3 RAID controllers and grouped accordingly.
This post provides steps needed to restart the configuration of an Sun StorEdge A1000 or Sun StorEdge A3x00 storage array back to factory defaults.
Sometimes you get into a situation where the only possible location of data that you need to get back is in a saveset that aborted during the backup.
We have many utilities like iostat, fsstat, sar, etc. in Solaris to identify disk I/O performance issues.
Troubleshooting potential Solaris network services and issues using standard everyday tools ping, snoop, netstat and nfsstat.
nsraddadmin is a simple command to quickly add a user account as a NetWorker administration without having to fire up either NMC or nsradmin.
Because the bpjobd.act.db file contains active and queued jobs, deleting it will only remove the unwanted job, since no other jobs were running.
Failed to create a VSS snapshot and it is required in order to run a system state backup.
For legacy NetBackup logs which is located under /usr/openv/netbackup/logs , below numbers can indicate to you the severity when troubleshooting.
Starting with NetWorker 8.0, NetWorker uses the /nsr/nsrrc file to define environment variables at NetWorker startup.
The nsrsgrpcomp command is used to query the NetWorker server jobs database and the savegrp log files in order to display a savegrp completion report.
The nsrreccomp command is used to query the NetWorker server jobs database and the recover log files in order to display a recover completion report.
When upgrading to NetWorker 8.1.x you cannot revert to 7.6.x without additional steps, whereas you can revert to 8.x without an issue.
After NMC is upgraded, the NMC gconsole.jnlp in the Java Web Start cache will be different from the previous version of NetWorker.
This post provides a simple procedure that allows you to rename a NetWorker server using the nsrclientfix command.
When starting the windows installer for NetWorker it does not give an option to upgrade, only to repair or uninstall.
If you installed Legato NetWorker on more than one server and used the same enabler code servers may become disabled with copy violation errors.
This is a safety feature that prevents the last save set on the volume from being overwritten.
A simple procedure to recover the SunFire T1000/T2000 ALOM password by resetting the ALOM NVRAM settings.
Volume names and barcodes do not match in the jukebox and media database, although 'match barcode label' is enabled.
Using this procedure you can override LDAP NMC authentication to the internal authentication or reset it back again to the internal authentication
This article describes how to identify the state of each disk drive in the Data Domain system using the command line interface (CLI).
This can occurs when Relabelling existing or new media via the command line or using the GUI where cartridge barcode differ to the internal label
Connecting to NMC results in 404 error using the default URL sometimes need gconsole.jnlp appending to the URL to resolve.
After upgrading from vCenter 5.0 to 5.5 VADP backups fail with invalid username/password
It all stemmed from a problem with disk space, namely the disk partition where the NSR resided became full
DB2 backups fail when a NetWorker client is mis-configured to backup to storage nodes
Here's a quick procedure to proactively fail a disk in Data Domain
Before updating the NetWorker server to release 8.x from any prior version consider the following
Resolving System Writer errors on Windows Server 2003
When VSS fails it can sometimes mean that you are unable to create a disk image or backup open files with EMC NetWorker
nsrim is unable to remove expired savesets which prevents data domain from performing housekeeping and prevents removing any data from the volumes
Files left in the temporary directory may impact the operations of a NetWorker server after an irregular shutdown and then not removed.
The nsrclientfix command is used for the analysis of the media database to look for client id corruption.
Solution to clear an Oracle Enterprise Manager Ops Center stuck job
This is a short post provides a how-to guide to troubleshooting backint failures by locating the correct logfile.
Moving an index on a Windows NetWorker server must be performed using the UASM utility to prevent corruption of the index files.
In a nutshell moving an index on a UNIX based NetWorker server os achieved by using the UASM command. This procedure is not for the faint hearted!
This article will illustrate the tools, concepts and techniques that you can use to develop your own custom NetWorker index management procedure.
mmrecov will allow you to recover your NetWorker server media database, client index and resource files.
A simple procedure to uninstall a solaris zone in an incomplete state
Most ZFS errors I've experienced generally fall into one of three categories. missing devices, damaged devices and data corruption.
Once the drive has been physically replaced, run the 'zfs replace' command against the device to allow it to be brought back online.
How to isolate the cause for the issue and identify the solution whilst connecting to the data domain system over a network.
savecore under solaris 2.6 fails with 2GB or larger swap partitions
ping or not to ping that is a solaris quirk
This article provides a quick reference guide for the open SuSE operating system
BIOS passwords are used to either prevent a user from changing the BIOS settings or to prevent the PC from booting without a password
To check your software to see if they meet minimum version requirements for installation you can use the uname comand, however...
The Oracle VM Serverlog files you should check when troubleshooting problems with Oracle VM Server
The eXtended System Control Facility Unit (XSCFU) is a service processor that operates and administrates both midrange servers
password expiry changes with WEBMIN fail
When creating webmin users and setting the flag change password after first login, 80% of the systems are successful
Ever needed to get Solaris to detect disks; the method depends on the version of Solaris. This article provides a how to
With Solaris 9 and later, comes an extremly nice mdb command for checking how much memory is used in kernel, and how much is used in user space.
The Best Practice Analyzer for Hyper-V has 74 scans to identify which settings are not configured, based on the Microsoft documentation and practices.
Media database scavenging is simply a way to force Legato NetWorker to rebuild the media database header files.
Use this procedure to switch from nsrauth to oldauth authentication on the backup server for the client exhibiting the problem.
Service mode is a means of managing potential failing hardware or if you want to disable a device after it's finished it's activity.
Using psrinfo, prtdiag and prtconf to find processor information on a Solaris system
The scope of this article is to provide a how to procedure aimed at cleaning up rouge and outdated NetWorker backups held on an Avamar system.
fixing a prtdiag hang under solaris
Sun StorADE software is used for fault management of storage devices. It provides monitoring, notifications, diagnostics, reports, etc.
Use nwadmin or nsradmin to edit the client resource for clients with this problem. Add all network names for this host to the Aliases attribute.
In earlier versions of NetWorker configuration names allowed the use of illegal characters. With 5.1 longer allow certail illegal characters.
This post simply provides a method on how to troubleshoot various problems you may encounter with Legato NetWorker archive and retrieve.
Legato NetWorker includes a script called nsr_support that generates an exhaustive diagnostic report.
This post contains a list of options for testing the communications between the NetWorker server and the client.
Duplicate IP address results in network/physical failed with exit status 96