SoftPrayog

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SoftPrayog provides information regarding software conforming to the Free and Open Source Software (FOSS) philosophy. You will find here articles on software engineering, tutorials and troubleshooting information regarding commands belonging to GNU/Linux based systems. The objective of SoftPrayog is to help in learning of the Linux operating system, its commands and provide software development resources.

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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.
Signals in Linux

Signals are software interrupts that are delivered to a process by the kernel. A signal is a notification about an event that has occurred.
systemd - System and service manager in Linux

systemd is the system and service manager for Linux based systems. systemd concepts, configuration directives and commands are explained.
Syslog

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

D-Bus is a mechanism for interprocess communication for Linux systems. D-Bus concepts along with example client-server programs are explained.
Find user login history - last and lastb commands in Linux

Linux commands, last and lastb, for printing user login history are explained with examples.
tmpfs in Linux

tmpfs is a temporary filesystem that resides in the main memory of a Linux system.

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ps command usage examples in Linux
The ps command is for the process status. ps gives the status of currently executing processes on a Linux or Unix system. There are multiple options for the ps command that help in getting the process information of interest.
Creating processes with fork and exec in Linux
The relationship between fork and exec system calls and how to use them is explained with an example.
POSIX Semaphores
POSIX named and unnamed semaphores are explained with example programs.
Synchronizing Files Between Multiple Computers Using Unison
As we work on multiple computers, we need to transfer the work done from one computer to another. Doing this manually is prone to error. This synchronization can be automated using Unison. Unison provides bidirectional synchronization between two computers.
Queue implementation in C using linked list
An implementation of queue in C using linked list is provided with program listing and results.
rsync
rsync is used for synchronizing the source files with the corresponding files at the destination. The source and destination may be on the same host, in which case rsync becomes an advanced copy command. Or, the destination may be a networked remote host. rsync uses the delta encoding technique for copying files; for files existing at the destination, only the differences from the source are transferred.
Git Tutorial
Git is a source code management system. Git simplifies the SCM functions for a project and improves the overall efficiency of the software process.

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