seq

seq is a command line tool available in Unix-like operating systems that generates a sequence of numbers. It is commonly used in scripting and automation tasks.

The basic syntax of the command is "seq [OPTION]... LAST", where LAST is the last number in the sequence.

If no options are provided, seq will generate a sequence of numbers starting from 1 to the LAST number. The numbers are printed to the standard output line by line.

seq also supports specifying a start number and increment value, allowing for more flexible sequences. By using the syntax "seq [OPTION]... FIRST INCREMENT LAST", you can control the starting point and the step size between numbers.

Some common options for seq include:

• -s: Specifies the separator between numbers (default is a newline).
• -w: Pads the output with leading zeros to have a consistent width.
• -f: Allows a specific format for the output, by using printf-style formatting.
• -r: Prints the sequence in reverse order, from LAST to the start number.

seq can be used in various ways, such as generating a series of filenames, controlling the loop iteration in scripts, producing numeric ranges for piping to other programs, and much more.

Overall, seq is a simple yet powerful command line tool that provides a convenient way to generate sequences of numbers in Unix-like environments.