Specify the record separator (\0 if no argument is given)

autosplit mode with -n or -p (splits $_ into $F)

benchmark mode, times the script execution

check syntax only

cd to directory before executing your script

set debugging flags (sets $DEBUG to true)

one line of script. Several -e's are allowed. Omit programfile in this case. To be sure that your shell does not mangle the command, put it within double quotes.

split() pattern for autosplit (-a)

Show the command help

edit ARGV files in place (make backup if extension supplied)

specify $LOAD_PATH directory (may be used more than once)

pass an option to the JVM (e.g. -J-Xmx512m). Use --properties to list JRuby properties. Run java -help for a list of other Java options.

specifies code-set (i.e. -Ku for Unicode, -Ke for EUC and -Ks for SJIS)

enable line ending processing

assume “while gets(); ... end” loop around your script

assume loop like -n but print line also like sed

require the library, before executing your script

enable some switch parsing for switches after script name

look for the script in bin or using PATH environment variable

turn on tainting checks

print version number, then turn on verbose mode

turn on warnings for your script

set warning level: 0=silence, 1=medium, 2=verbose(default)

enable extended option (omit option to list them)

enable parsing debug output

print the copyright notice and exit

sets the execution mode most suitable for debugger functionality

shows the online help, listing all the command line options

runs the jruby process under JDB

List all configuration Java properties (pass -J-Dproperty=value to set them)

run with profiling using the JVM's sampling profiler

use the non-optimizing "client" JVM (improves startup time; default)

use the optimizing "server" JVM (improves performance, but takes longer to start)

enable JMX management and monitoring of the VM and JRuby via local process connections from tools like jconsole. Process name is org.jruby.Main. To enable remote connections via JMX remoting, you need to pass additional parameters via -J.

do not launch a GUI window, no matter what. Corresponds to the JVM option -Djava.awt.headless

specify Ruby 1.8.x compatibility (default)

specify Ruby 1.9.x compatibility (not yet fully done)

show the JVM bytecode produced by compiling specified code

print the version