What happens when I run systemd on a system that's already running?











up vote
-2
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Out of curiosity I just ran the following on Debian 9.6:



/lib/systemd/systemd


which resulted in the following output:



Startup finished in 31ms.


with the process waiting. I killed it with Ctrl+C:



^CReceived SIGINT.


When I ran the command a second time, the output changed:



Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Startup finished in 29ms.


Now I have the following 2 processes running:



1410 /lib/systemd/systemd --user
11647 /lib/systemd/systemd --user


in addition to:



1 /sbin/init




What is going on? Why did the second run result in an error while the first one didn't? Am I running three systems concurrently?










share|improve this question


















  • 1




    I haven't read the systemd docs in depth but do recall it can actually be used by a non-root non-PID-1 account to supervise other processes.
    – LawrenceC
    Nov 19 at 3:03















up vote
-2
down vote

favorite












Out of curiosity I just ran the following on Debian 9.6:



/lib/systemd/systemd


which resulted in the following output:



Startup finished in 31ms.


with the process waiting. I killed it with Ctrl+C:



^CReceived SIGINT.


When I ran the command a second time, the output changed:



Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Startup finished in 29ms.


Now I have the following 2 processes running:



1410 /lib/systemd/systemd --user
11647 /lib/systemd/systemd --user


in addition to:



1 /sbin/init




What is going on? Why did the second run result in an error while the first one didn't? Am I running three systems concurrently?










share|improve this question


















  • 1




    I haven't read the systemd docs in depth but do recall it can actually be used by a non-root non-PID-1 account to supervise other processes.
    – LawrenceC
    Nov 19 at 3:03













up vote
-2
down vote

favorite









up vote
-2
down vote

favorite











Out of curiosity I just ran the following on Debian 9.6:



/lib/systemd/systemd


which resulted in the following output:



Startup finished in 31ms.


with the process waiting. I killed it with Ctrl+C:



^CReceived SIGINT.


When I ran the command a second time, the output changed:



Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Startup finished in 29ms.


Now I have the following 2 processes running:



1410 /lib/systemd/systemd --user
11647 /lib/systemd/systemd --user


in addition to:



1 /sbin/init




What is going on? Why did the second run result in an error while the first one didn't? Am I running three systems concurrently?










share|improve this question













Out of curiosity I just ran the following on Debian 9.6:



/lib/systemd/systemd


which resulted in the following output:



Startup finished in 31ms.


with the process waiting. I killed it with Ctrl+C:



^CReceived SIGINT.


When I ran the command a second time, the output changed:



Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Failed to connect to API bus: Connection refused
Startup finished in 29ms.


Now I have the following 2 processes running:



1410 /lib/systemd/systemd --user
11647 /lib/systemd/systemd --user


in addition to:



1 /sbin/init




What is going on? Why did the second run result in an error while the first one didn't? Am I running three systems concurrently?







debian systemd






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asked Nov 19 at 2:52









Andrey Portnoy

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1003








  • 1




    I haven't read the systemd docs in depth but do recall it can actually be used by a non-root non-PID-1 account to supervise other processes.
    – LawrenceC
    Nov 19 at 3:03














  • 1




    I haven't read the systemd docs in depth but do recall it can actually be used by a non-root non-PID-1 account to supervise other processes.
    – LawrenceC
    Nov 19 at 3:03








1




1




I haven't read the systemd docs in depth but do recall it can actually be used by a non-root non-PID-1 account to supervise other processes.
– LawrenceC
Nov 19 at 3:03




I haven't read the systemd docs in depth but do recall it can actually be used by a non-root non-PID-1 account to supervise other processes.
– LawrenceC
Nov 19 at 3:03















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