plselect1

plselect1 is a command-line utility primarily used in Linux and Unix-like operating systems. Its main function is to select and display a single line from a given input, often standard input or a file. The selection is typically based on a numerical index provided by the user. For example, if a user specifies "plselect1 3", the command will output the third line of the input.

This tool is particularly useful in scripting and automated tasks where specific lines from a larger text block need to be extracted. It can be chained with other commands using pipes. For instance, a command like "ls -l | plselect1 5" would list the files in the current directory with detailed information and then display only the fifth line of that output.

The utility is part of a larger suite of text processing tools, often found alongside commands like `plcat`, `plgrep`, and `plsed`. These tools collectively offer robust capabilities for manipulating and analyzing text data from the command line. plselect1's simplicity makes it a straightforward choice for tasks requiring precise line extraction without the overhead of more complex tools. Its usage is generally confined to situations where only one specific line is needed, distinguishing it from tools that can select multiple lines or perform more complex pattern matching.