Analyzing the NGINX web server log file

A Perl script for generating the report of the most frequent visitors to a website from the nginx log file is given.

October 3, 2018

Android adb install failure INSTALL_PARSE_FAILED_NO_CERTIFICATES

The download of an Android app with the adb gave the error INSTALL_PARSE_FAILED_NO_CERTIFICATES. Steps for resolving the error are given.

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October 3, 2018

Resolution of a 404 Not Found error for sitemap of a website built using Drupal CMS and served by nginx webserver.

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October 3, 2018

While running the optipng command, the error "Can't back up the existing output file" was reported. Solution to the error is given.

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October 3, 2018

Syslog is a protocol for conveying event notification messages. Syslog concepts and calls for logging messages are explained.

October 3, 2018

Quite often, we wish to get a project from GitHub. The steps for getting a project from GitHub are explained.

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October 3, 2018

Solution to the error, "Failed to send 300 byte long packet over fallback interface, while starting a service".

October 3, 2018

D-Bus is a mechanism for interprocess communication for Linux systems. D-Bus concepts along with example client-server programs are explained.

October 3, 2018

last and lastb commands print the user login history. last prints the previous logged in users and lastb shows the failed login attempts.

October 3, 2018

Resolution of the error Dovecot: imap Error: open (/var/mail/username) failed observed on a Postfix mail server site.

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October 3, 2018