Awk BuiltIn Variables

Awk BuiltIn Variables

The following is a list of variables that awk sets automatically on certain occasions in order to provide information to your program. The variables that are specific to gawk are marked with a pound sign (#). These variables are gawk extensions. In other awk implementations or if gawk is in compatibility mode (see section Command-Line Options ), they are not special.

VARIABLE NAME DESCRIPTION
FS input field separator variable
OFS Output Field Separator
RS Input Record Separator variable
ORS Output Record Separator Variable
NR Number of Records
NF Number of Fields in a record
FILENAME Name of the current input file
FNR Number of Records relative to the current input file
RLENGTH length of the substring matched by the match() function
RSTART first position in the string matched by match() function

FS - input field separator variable

It represents the (input) field separator and its default value is space. You can also change this by using -F command line option.

Awk If Statement

Awk If Statement

In this awk tutorial, let us review awk conditional if statements with practical examples.

Normally conditional statement checks the condition, before performing any action. If the condition is true action(s) are performed. Similarly action can be performed if the condition is false.

Conditional statement starts with the keyword called "if". Awk supports three different kind of if statement.

awk If Statement

Single Action: Simple If statement is used to check the conditions, if the condition returns true, it performs its corresponding action(s).

YUM Commands for Package Management

YUM Commands for Package Management

What is YUM?

YUM (Yellowdog Updater Modified) is an open source command-line as well as graphical based package management tool for RPM (RedHat Package Manager) based Linux systems. It allows users and system administrator to easily install, update, remove or search software packages on a systems. It was developed and released by Seth Vidal under GPL (General Public License) as an open source, means anyone can allowed to download and access the code to fix bugs and develop customized packages. YUM uses numerous third party repositories to install packages automatically by resolving their dependencies issues.

How Pause-Resume any Task or Process in Windows

How Pause-Resume any Task or Process in Windows

Resource Monitor - resmon.exe is an highly useful tool built-in to Windows to monitor the various resource (CPU, Disk) usage of PC. It’s overshadowed by another similar and commonly known tool, Task Manager although some of its features are superior to the latter.

suspend/resume a running task in Windows

  • Open up Resource Monitor. You can search for it in the Start or call it by its pet name resmon

FastAPI language translations I18n Step by Step

FastAPI language translations I18n Step by Step

Since the beginning of 2020, FastAPI has been gaining momentum as one of the potential alternatives to Flask server for RESTful API. If you are an existing FastAPI user, you should be aware that it does not come with built-in internationalization, and that will likely not change soon, because internationalization strategies are application-dependent.

The following tutorial focuses on server-side i18n .

This tutorial will show you how to i18n your FastAPI web application easily using the following Python libraries:

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