NODE(1) BSD General Commands Manual NODE(1)
NAME
node — server-side JavaScript runtime
SYNOPSIS
node [options] [v8-options] [-e string | script.js | -] [--]
[arguments ...]
node debug [-e string | script.js | - | <host>:<port>] ...
node [--v8-options]
DESCRIPTION
Node.js is a set of libraries for JavaScript which allows it to be used
outside of the browser. It is primarily focused on creating simple,
easy-to-build network clients and servers.
Execute node without arguments to start a REPL.
OPTIONS
-v, --version
Print node's version.
-h, --help
Print node command line options. The output of this option is
less detailed than this document.
-e, --eval string
Evaluate string as JavaScript.
-p, --print string
Identical to -e, but prints the result.
-c, --check
Check the script's syntax without executing it. Exits with an
error code if script is invalid.
-i, --interactive
Open the REPL even if stdin does not appear to be a terminal.
-r, --require module
Preload the specified module at startup. Follows `require()`'s
module resolution rules. module may be either a path to a file,
or a node module name.
--inspect=[host:]port
Activate inspector on host:port. Default is 127.0.0.1:9229.
V8 Inspector integration allows attaching Chrome DevTools and
IDEs to Node.js instances for debugging and profiling. It uses
the Chrome Debugging Protocol.
--inspect-brk=[host:]port
Activate inspector on host:port and break at start of user
script.
--inspect-port=[host:]port
Set the host:port to be used when the inspector is activated.
--no-deprecation
Silence deprecation warnings.
--trace-deprecation
Print stack traces for deprecations.
--throw-deprecation
Throw errors for deprecations.
--pending-deprecation
Emit pending deprecation warnings.
--no-warnings
Silence all process warnings (including deprecations).
--napi-modules
Enable loading native modules compiled with the ABI-stable
Node.js API (N-API) (experimental).
--abort-on-uncaught-exception
Aborting instead of exiting causes a core file to be generated
for analysis.
--trace-warnings
Print stack traces for process warnings (including deprecations).
--redirect-warnings=file
Write process warnings to the given file instead of printing to
stderr.
--trace-sync-io
Print a stack trace whenever synchronous I/O is detected after
the first turn of the event loop.
--no-force-async-hooks-checks
Disable runtime checks for `async_hooks`. These will still be
enabled dynamically when `async_hooks` is enabled.
--trace-events-enabled
Enable the collection of trace event tracing information.
--trace-event-categories categories
A comma-separated list of categories that should be traced when
trace event tracing is enabled using --trace-events-enabled.
--zero-fill-buffers
Automatically zero-fills all newly allocated Buffer and Slow-
Buffer instances.
--preserve-symlinks
Instructs the module loader to preserve symbolic links when
resolving and caching modules.
--track-heap-objects
Track heap object allocations for heap snapshots.
--prof-process
Process V8 profiler output generated using the V8 option --prof.
--v8-options
Print V8 command-line options.
Note: V8 options allow words to be separated by both dashes (-)
or underscores (_).
For example, --stack-trace-limit is equivalent to
--stack_trace_limit.
--v8-pool-size=num
Set V8's thread pool size which will be used to allocate back-
ground jobs. If set to 0 then V8 will choose an appropriate size
of the thread pool based on the number of online processors. If
the value provided is larger than V8's maximum, then the largest
value will be chosen.
--tls-cipher-list=list
Specify an alternative default TLS cipher list. Requires Node.js
to be built with crypto support. (Default)
--enable-fips
Enable FIPS-compliant crypto at startup. Requires Node.js to be
built with ./configure --openssl-fips.
--force-fips
Force FIPS-compliant crypto on startup (Cannot be disabled from
script code). Same requirements as --enable-fips.
--openssl-config=file
Load an OpenSSL configuration file on startup. Among other uses,
this can be used to enable FIPS-compliant crypto if Node.js is
built with ./configure --openssl-fips.
--use-openssl-ca, --use-bundled-ca
Use OpenSSL's default CA store or use bundled Mozilla CA store as
supplied by current Node.js version. The default store is
selectable at build-time.
Using OpenSSL store allows for external modifications of the
store. For most Linux and BSD distributions, this store is main-
tained by the distribution maintainers and system administrators.
OpenSSL CA store location is dependent on configuration of the
OpenSSL library but this can be altered at runtime using environ-
ment variables.
The bundled CA store, as supplied by Node.js, is a snapshot of
Mozilla CA store that is fixed at release time. It is identical
on all supported platforms.
See SSL_CERT_DIR and SSL_CERT_FILE.
--icu-data-dir=file
Specify ICU data load path. Overrides NODE_ICU_DATA.
--experimental-modules
Enable experimental ES module support and caching modules.
--experimental-vm-modules
Enable experimental ES module support in VM module.
- Alias for stdin, analogous to the use of - in other command-line
utilities. The executed script is read from stdin, and remaining
arguments are passed to the script.
-- Indicate the end of node options. Pass the rest of the arguments
to the script.
If no script filename or eval/print script is supplied prior to
this, then the next argument will be used as a script filename.
ENVIRONMENT
NODE_DEBUG modules...
Comma-separated list of core modules that should print debug
information.
NODE_DISABLE_COLORS
When set to 1, colors will not be used in the REPL.
NODE_EXTRA_CA_CERTS file
When set, the well-known “root” CAs (like VeriSign) will be
extended with the extra certificates in file. The file should
consist of one or more trusted certificates in PEM format.
If file is missing or misformatted, a message will be emitted
once using process.emitWarning(), but any errors are otherwise
ignored.
NODE_ICU_DATA file
Data path for ICU (Intl object) data. Will extend linked-in data
when compiled with small-icu support.
NODE_NO_WARNINGS
When set to 1, process warnings are silenced.
NODE_OPTIONS options...
A space-separated list of command-line options, which are inter-
preted as if they had been specified on the command-line before
the actual command (so they can be overridden). Node will exit
with an error if an option that is not allowed in the environment
is used, such as --print or a script file.
NODE_PATH directories...
A colon-separated list of directories prefixed to the module
search path.
NODE_PENDING_DEPRECATION
When set to 1, emit pending deprecation warnings.
NODE_REPL_HISTORY file
Path to the file used to store persistent REPL history. The
default path is ~/.node_repl_history, which is overridden by this
variable. Setting the value to an empty string ("" or " ") will
disable persistent REPL history.
OPENSSL_CONF file
Load an OpenSSL configuration file on startup. Among other uses,
this can be used to enable FIPS-compliant crypto if Node.js is
built with ./configure --openssl-fips.
If the --openssl-config command-line option is used, this envi-
ronment variable is ignored.
SSL_CERT_DIR dir
If --use-openssl-ca is enabled, this overrides and sets OpenSSL's
directory containing trusted certificates.
SSL_CERT_FILE file
If --use-openssl-ca is enabled, this overrides and sets OpenSSL's
file containing trusted certificates.
NODE_REDIRECT_WARNINGS file
Write process warnings to the given file instead of printing to
stderr. Equivalent to passing --redirect-warnings file on com-
mand-line.
BUGS
Bugs are tracked in GitHub Issues: https://github.com/nodejs/node/issues
COPYRIGHT
Copyright Node.js contributors. Node.js is available under the MIT
license.
Node.js also includes external libraries that are available under a vari-
ety of licenses. See https://github.com/nodejs/node/blob/master/LICENSE
for the full license text.
SEE ALSO
Website: https://nodejs.org/
Documentation: https://nodejs.org/api/
GitHub repository & Issue Tracker: https://github.com/nodejs/node
Mailing list: http://groups.google.com/group/nodejs
IRC (general questions): chat.freenode.net #node.js (unofficial)
IRC (Node.js core development): chat.freenode.net #node-dev
AUTHORS
Written and maintained by 1000+ contributors:
https://github.com/nodejs/node/blob/master/AUTHORS
February 16, 2018