server monitoring

Monitor changes made to a file using auditd

Tags: server monitoring

Published on : July 6, 2019 by

Monitor changes made to a file using auditd

Modern Linux kernel comes with auditd daemon. It is responsible for writing audit records to the disk. During startup, the rules in /etc/audit.rules are read by this daemon. You can open /etc/audit.rules file and make changes such as setup audit file log location and other option. The default file is good enough to get started […]

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How to check whether UDP connection is open or not?

Tags: Server Managementserver monitoring

Published on : February 12, 2019 by

How to check whether UDP connection is open or not?

UDP is being a connectionless protocol, you can t reliably say that the port is open or not. Below two commands are the only way of checking the same. When you send a packet to the open port, there need not be any acknowledgment saying that the port is open. Theoretically, UDP should give a […]

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SysAdmin Series – Understanding the SAR Output

Tags: SARserverserver monitoring

Published on : January 1, 2019 by

SysAdmin Series – Understanding the SAR Output

System Activity Reporter aka SAR is a part of sysstat package. SAR helps you to get and compare the historical data and that too of different metrics. SAR collects the data through two cronjobs that runs every 10 minutes and at 23:53 . SAR takes the statistics of different aspects of the machine at a […]

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