scripting Archives - IT Nursery

linux, Programming

IT Nursery

The ‘eval’ command in Bash and its typical uses

After reading the Bash man pages and with respect to this post, I am still having trouble understanding what exactly the eval command ...

June 3, 2022
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Programming, Python

IT Nursery

How do I abort the execution of a Python script? [duplicate]

This question already has answers here: How to terminate a script? (12 answers) Closed 2 years ago. I have a simple Python script ...

June 3, 2022
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bash, Programming

IT Nursery

How to get the part of a file after the first line that matches a regular expression

I have a file with about 1000 lines. I want the part of my file after the line which matches my grep statement. ...

June 2, 2022
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Programming, scripting

IT Nursery

awk without printing newline

I want the variable sum/NR to be printed side-by-side in each iteration. How do we avoid awk from printing newline in each iteration ...

May 31, 2022
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Programming, Python

IT Nursery

How to make a Python script run like a service or daemon in Linux

I have written a Python script that checks a certain e-mail address and passes new e-mails to an external program. How can I ...

May 29, 2022
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bash, Programming

IT Nursery

Copy folder recursively, excluding some folders

I am trying to write a simple bash script that will copy the entire contents of a folder including hidden files and folders ...

May 29, 2022
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bash, Programming

IT Nursery

How to check the extension of a filename in a bash script?

I am writing a nightly build script in bash. Everything is fine and dandy except for one little snag: #!/bin/bash for file in ...

May 28, 2022
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Programming, Python

IT Nursery

Purpose of #!/usr/bin/python3 shebang

I have noticed this in a couple of scripting languages, but in this example, I am using python. In many tutorials, they would ...

May 27, 2022
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bash, Programming

IT Nursery

Determine if a function exists in bash

Currently I’m doing some unit tests which are executed from bash. Unit tests are initialized, executed and cleaned up in a bash script. ...

May 27, 2022
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bash, Programming

IT Nursery

Test for non-zero length string in Bash: [ -n “$var” ] or [ “$var” ]

I’ve seen Bash scripts test for a non-zero length string in two different ways. Most scripts use the -n option: #!/bin/bash # With ...

May 26, 2022
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