[Linux] Bash seq Uso equivalente: Generate a sequence of numbers

Overview

The seq command in Bash is used to generate a sequence of numbers. It allows users to create a list of numbers in a specified range, which can be useful for scripting and automation tasks.

Usage

The basic syntax of the seq command is as follows:

seq [options] [arguments]

Common Options

• -f FORMAT: Specifies a format for the output numbers.
• -s STRING: Sets a custom separator between the numbers (default is a newline).
• -w: Pads the numbers with leading zeros to make them the same width.

Common Examples

1. Basic Sequence Generation Generate numbers from 1 to 10:

   seq 1 10
   

2. Custom Step Value Generate numbers from 1 to 10 with a step of 2:

   seq 1 2 10
   

3. Formatted Output Generate numbers from 1 to 5 with a specific format:

   seq -f "Number: %g" 1 5
   

4. Using a Custom Separator Generate numbers from 1 to 5 separated by commas:

   seq -s "," 1 5
   

5. Zero-Padded Numbers Generate numbers from 1 to 10 with leading zeros:

   seq -w 1 10
   

Tips

• Use seq in combination with other commands in a pipeline to automate tasks efficiently.
• When generating large sequences, consider performance implications and the potential for large outputs.
• Remember that seq can be a handy tool for creating lists for loops in scripts.