*--captcha*::
The captcha token, required if registration failed with a captcha required error.
To get the token, go to https://signalcaptchas.org/registration/generate.html
+For the staging environment, use: https://signalcaptchas.org/staging/registration/generate.html
Check the developer tools for a redirect starting with signalcaptcha:// Everything after signalcaptcha:// is the captcha token.
=== verify
Specify the recipient group ID in base64 encoding.
*-m* MESSAGE, *--message* MESSAGE::
-Specify the message, if missing, standard input is used.
+Specify the message.
+Currently, signal-cli reads the message from stdin if `-m` is missing, but this will change in a future version and the explicit flag `--message-from-stdin` should be used instead.
+
+*--message-from-stdin*::
+Read the message from standard input.
*-a* [ATTACHMENT [ATTACHMENT ...]], *--attachment* [ATTACHMENT [ATTACHMENT ...]]::
Add one or more files as attachment.
signal-cli -a ACCOUNT send -m "This is a message" [RECIPIENT [RECIPIENT ...]] [-a [ATTACHMENT [ATTACHMENT ...]]]
Pipe the message content from another process::
-uname -a | signal-cli -a ACCOUNT send [RECIPIENT [RECIPIENT ...]]
+uname -a | signal-cli -a ACCOUNT send --message-from-stdin [RECIPIENT [RECIPIENT ...]]
Create a group::
signal-cli -a ACCOUNT updateGroup -n "Group name" -m [MEMBER [MEMBER ...]]