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Host gets stuck at certain percentage while entering maintenance mode in Full Data Migration (VMware, vSAN)

Problem Statement:  Host stuck at a 68% (certain percentage) while entering vSAN Maintenance Mode. When you enter a vSAN Maintenance mode with option "Full data migration", its bound to take long time depending upon the

How to use iperf3 tool to monitor network bandwidth in Linux

I have already written an article to check the network bandwidth speed using netperf available at below link How to monitor network bandwidth in Linux using netperf In this article I will guide you the

sed: add or append character at beginning or end of line (row) of a file

You may have some requirement wherein you have to cut a row or get some output from a file and append it to another file as a prefix or suffix. or you know that you

sed: Ignore whitespace while matching a pattern

In my last articles I had shared the arguments with sed which can be used to perform case insensitive actions (search, replace..) in a file and to delete all blank lines from the file. Now

How to fix "Postponed keyboard-interactive for invalid user from port ssh2 [preauth]"

The other day I was unable to perform a passwordless (passphrase) based authentication for one of my user and for every attempt I was getting the below error Error: Postponed keyboard-interactive for invalid user deepak

How to print or grep only the matched string or text or word or pattern in Linux using bash

By default when we use grep without any switch it prints the entire line which matches the string we tried to grep for For eg I would like search for "ModLoad" in my rsyslog.conf file

How to forcefully sync date and time using the NTP server in Linux

The commands and steps to initiate a forceful sync with NTP server may vary based on the distribution you are using. By default if NTP service is running it will automatically sync the client's date

How to redirect specific log messages to separate log file using rsyslog in Linux

In my earlier articles I had shared the steps to transfer the rsyslog messages to a different host with and without TLS certificates. The difference is that with TLS certificates the transfer of log messages

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