Master Network Automation with Python for Network Engineers using SSH, Paramiko, Netmiko, Telnet or Serial Connections

Network automation is the process of automating network configuration and management tasks using software tools and scripts. Automation can help network administrators reduce manual errors, improve network performance, and increase efficiency.

To automate network tasks, you need to be familiar with various networking protocols and programming languages. In this response, I will focus on the SSH, Paramiko, Netmiko, Telnet, and serial connections.

SSH:

SSH (Secure Shell) is a network protocol that provides secure access to remote devices. It is widely used in network automation to connect to network devices and execute commands remotely. Here's an example of how to use SSH with Python:

Read more »

Perl DB Connection Tutorial with Different databases

 Perl provides support for connecting and interacting with a variety of databases. Here are some examples of connecting to different databases using Perl:

Method 1: Connecting to MySQL using DBI

The Perl DBI (Database Interface) module provides a consistent interface for connecting to and interacting with different databases. Here's an example of connecting to a MySQL database using DBI:

Read more »

perl piped open - reading data from a system process?

Perl Piped Open:

open function is very useful for reading or writing the data files on the system and apart from this file processing we can use pipe symbol for getting data from a system process or sending the data to a system process can be achieved.   lets try this now,

Read more »

perl read file - 15 ways

Method 1:

open(FH,'<file.txt') or die "Cant open file $!";

print FH;

close(FH);

Read more »

write 1000 uniq perl interview questions and answers to master in perl - part1

1. Q: In Perl, what does the sigil $_ represent?

   A: In Perl, the sigil $_ represents the default argument to a subroutine. It is a global variable that is set automatically by Perl whenever a subroutine is called.

2. Q: In Perl, what does the backslash \ do in front of a variable name?

   A: In Perl, the backslash \ in front of a variable name is used to force a string interpretation of the variable, rather than a numeric interpretation. This can be useful when working with non-numeric variables, or when you want to avoid potential side effects caused by Perl's built-in operations on numbers

Read more »

Perl Built-ins Quick Reference

1. String Functions

length

Returns the length of a string.

my $str = "Hello, World!";
my $len = length($str);
print "Length: $len\n";  # Output: Length: 13

substr

Extracts a substring from a string.

my $str = "Hello, World!";
my $sub = substr($str, 0, 5);
print "Substring: $sub\n";  # Output: Substring: Hello

index

Returns the position of a substring within a string.

my $str = "Hello, World!";
my $pos = index($str, "World");
print "Position: $pos\n";  # Output: Position: 7

rindex

Returns the last position of a substring within a string.

my $str = "Hello, World! World!";
my $pos = rindex($str, "World");
print "Last Position: $pos\n";  # Output: Last Position: 14

uc

Converts a string to uppercase.

my $str = "Hello, World!";
my $uc_str = uc($str);
print "Uppercase: $uc_str\n";  # Output: Uppercase: HELLO, WORLD!

lc

Converts a string to lowercase.

my $str = "Hello, World!";
my $lc_str = lc($str);
print "Lowercase: $lc_str\n";  # Output: Lowercase: hello, world!

ucfirst

Converts the first character of a string to uppercase.

my $str = "hello, world!";
my $ucfirst_str = ucfirst($str);
print "Ucfirst: $ucfirst_str\n";  # Output: Ucfirst: Hello, world!

Read more »

perl insert new line at beginning of existing data file

Method 1:

1.perl -pi -e 'print "perl one liner is added" if $. == 1'  file.txt

Method 2:

open my $file1,  '<',  $file1.txt;
open my $file2, '>', "$file2.txt";

print $file2 "perl one liner is added";

while( <$file1> ) {
    print $file2 $_;
}
close $file2;
close $file1;

Method 3:

echo "perl one liner is added" | perl -0 -i -pe 'BEGIN {$input = <STDIN>}; print $input' file.txt

Method 4:

open(M,"<","file1.txt");
@m = <M>;
close(M);
open(M,">","file2.txt");
unshift (@m,"Perl Coder is always magic\n");
print M @m;
close(M);

kaavannan perl blogspot

Python Asyncio: Building High-Performance Web Apps with Asynchronous Programming

As the demand for web applications continues to grow, developers are constantly seeking ways to improve their performance and scalability. One approach to achieve this is through asynchronous programming, which allows applications to handle multiple tasks simultaneously without blocking the main thread. Python's asyncio library provides a powerful toolset for implementing asynchronous programming, and in this article, we will explore its features and how to leverage them to build high-performance web applications.

What is asyncio?

Asyncio is a Python library for asynchronous programming that was introduced in Python 3.4. It allows developers to write concurrent code in a simple and elegant way, without the complexity of traditional multi-threaded programming. Asyncio is built on top of coroutines, which are lightweight subroutines that can be suspended and resumed during their execution. This makes it possible to execute multiple tasks concurrently without blocking the main thread.

Read more »