Why does System only run in Asterisk console mode?

Question

Asterisk

Good afternoon. Debian 9 + Asterisk 13, a rudimentary dialplan that executes a couple of system commands after disconnection.

.....
exten => _.,n,Dial(SIP........)
exten => _.,n,Hangup()
......
exten => h,1,System(echo .....)
exten => h,n,System(rm -rf /home/user/......)
...

All this only works if you stop asterisk and run it via asterisk -vvvgc in console mode.
/bin/echo didn't help.
In those descriptions of System () that I read, no mention of rights and other nuances was mentioned. What did I miss? There is little experience with the asterisk, so it may well be some kind of trifle, please do not kick much) Thank you in advance.

Answer 1

I wrote a question and immediately came to the answer. Still right. In /etc/default/asterisk I changed AST_USER="asterisk" to AST_USER="root" and everything worked. Let's dig in this direction.