Bash-completion is a shell script that enables tab completion functionality in the bash shell for a large number of shell commands and applications. It makes using the command line faster and more convenient.
bash-completion is a shell script that provides intelligent tab completion functionality for bash shell commands and other applications/scripts. It allows you to use the Tab key to autocomplete file paths, command names, command options/flags, argument values and more as you type at the command line.
bash-completion works by hooking into the bash shell's completion system and making use of the completion specifications and metadata of various commands and applications to provide relevant suggestions as you type. It comes packaged with completion logic for hundreds of common CLI utilities. In addition, application developers can create custom bash completion scripts for their apps to allow smart autocompletion.
By enabling intelligent autocompletion as you type shell commands, bash-completion makes working at the command line much more convenient and efficient. Instead of having to remember and manually type out full paths, command names, options etc., you can rely on bash-completion to take care of it for you. This can save a significant amount of time and effort at the command line.
In summary, bash-completion takes the tab completion functionality built into bash shell and makes it far more intelligent and context-aware. It's an essential tool for any serious command line user on Linux or UNIX-like systems that use bash as the default shell.