Print a short help text and exit. Print a short version string and exit. Do not query the user for authentication for privileged operations. BOOL Enable or disable printing of the legend, i.e. column headers and the footer with hints. The legend is printed by default, unless disabled with or similar. Do not print the legend, i.e. column headers and the footer with hints. Copy the contents of config files to standard output. Before each file, the filename is printed as a comment. MODE Shows output formatted as JSON. Expects one of short (for the shortest possible output without any redundant whitespace or line breaks), pretty (for a pretty version of the same, with indentation and line breaks) or off (to turn off JSON output, the default). When used with kill, choose which signal to send to selected processes. Must be one of the well-known signal specifiers such as SIGTERM, SIGINT or SIGSTOP. If omitted, defaults to . The special value help will list the known values and the program will exit immediately, and the special value list will list known values along with the numerical signal numbers and the program will exit immediately.