whereis

The "whereis" command line tool is used in Unix-based operating systems. It is primarily used to locate the binary, source, and manual page files for a specified command. The tool searches for the specified command in the directories specified in the user's PATH environment variable. It provides the file paths of the binary executable, source code, and the location of the man page for a given command. The "whereis" command is useful in situations where you want to know which directories contain the files associated with a particular command. By default, the "whereis" command does not search all directories; it only looks in the standard binary and source directories. The command also has several flags, such as "-b" to only search for the binary file, and "-m" to only search for the man page. "whereis" does not perform a full-text search within files; it simply provides the file paths of the relevant files. This tool is often used by system administrators and developers to quickly locate the relevant files for a command and get detailed information about its usage. The "whereis" command is a handy utility that saves time by directly providing the essential files for a command instead of manually searching through multiple directories.