Common command-line options

The following is a list of command-line options that I’ve noticed are in common usage. In bold are the uses that I believe must be the default.

-a
- all
-f
- force
- file (either input or output )
- “from” type (combined with -t as “to type”, e.g. -f svg -t png to convert form SVG to PNG)
-h
- help
- hostname (perhaps prefer -H instead)
-i
- input file (combined with -o as “output file”)
- interactive
- ignore/exclude
-m
- message
-n
- number/amount
-o
- output file (combined with -i as “input file”)
-p
- port
-q
- quiet (which silences stdout, but not stderr, because stderr is for all diagnostic output)
-r
- recursive
-t
- “to” type (combined with -f as “from type” e.g. -f svg -t png to convert form SVG to PNG)
-v
- version
- verbose
-V
- version

See also