Jun 27 2019
SAR stands for System Activity Report, as its name suggest sar command is used to collect,report & save CPU, Memory, I/O usage in Unix like operating system. SAR command produce the reports on the fly and can also save the reports in the log files as well.
In this article we will discuss different examples of SAR Command in CentOS 7 & RHEL 7, in case sar is not installed on your system then use the below command to install it. Continue reading
Jun 19 2019
As you definitely know disabling user in Active Directory won’t disable it in Skype for Business. That’s because Skype for Business uses it’s own AD attributes. So such users will still be visible in Skype for Business Control Panel and in licenses count. Continue reading
Jun 18 2019
DSCP (Differentiated Services Code Point) is a series of bits in the IP header for classification purposes. These bits specify the precedence value of the packet, the drop probability, and the network service used.
Before setting the DSCP flag with a desired value, you need to take some things into consideration. You cannot force the DSCP flag from the Data Distribution Service (DDS) middleware, but you can suggest the system use a specific value. The reason is that all network elements such as switches and routers must have the capability and be enabled to actually use the TOS bits to treat higher-priority packets differently (TOS is an older mechanism to prioritize packets). In addition, many network transports are not capable of managing packet priority. All this makes it impossible for DDS to control the prioritization of data at the network level. Continue reading
Jun 04 2019
On first sign in Polycom phone cannot download certificate because domain is not accessible and displays the following messages: Continue reading
May 22 2019
When trying to load data from database that is in AlwaysOn High Availability Group from Microsoft Excel the following error occurs:
Access to the remote server is denied because the current security context is not trusted Continue reading
May 22 2019
When trying to execute Stored Procedures on a particular Database we got the following error:
The server principal “domain\user” is not able to access the database “dbXYZ” under the current security context.
The database owner SID recorded in the master database differs from the database owner SID recorded in database ‘dbXYZ’. You should correct this situation by resetting the owner of database ‘dbXYZ’ using the ALTER AUTHORIZATION statement. Continue reading
May 08 2019
I correctly configured ODBC connection on Asterisk server to MSSQL database in Always On cluster.
The working configuration was as follows: Continue reading
Apr 30 2019
Skype for Business like any other service needs periodic maintenance and that’s when you need to know how to gracefully stop Skype for Business service without losing a quorum.
Before stopping Skype for Business service make sure you will have more than 50% of front end servers running. Continue reading
Apr 24 2019
Finding files containing text string in Linux is the easy task with the grep utility. grep also allows you to find files with specific text by searching directories recursively by defining -r key. Here are a few examples:
Apr 17 2019
While loading res_odbc.so Asterisk crashes with “invalid pointer” error like in the backtrace below:
Loading res_odbc.so. Continue reading
