I did loginctl terminate-user domain before so now I have 47 such
sessions.
domain@domain:~$ ps -alx
F UID PID PPID PRI NI VSZ RSS WCHAN STAT TTY TIME COMMAND
4 0 1 0 20 0 232712 10960 ep_pol Ss ? 152:21
/lib/systemd/systemd --system --deserialize 12
1 0 2 1 20 0 0 0 kthrea S ? 0:00
[kthreadd/79baa9]
1 0 3 2 20 0 0 0 kthrea S ? 0:00 [khelper]
4 105 139 1 20 0 189016 988 poll_s Ssl ? 0:03
/usr/sbin/rsyslogd -n
4 0 149 1 20 0 88660 19704 ep_pol Ss ? 1:32
/lib/systemd/systemd-logind
4 0 152 1 20 0 28344 376 hrtime Ss ? 0:02
/usr/sbin/cron -f
4 100 153 1 20 0 48428 1944 ep_pol Ss ? 2:57
/usr/bin/dbus-daemon --system --address=systemd: --4 0 163 1 20 0
196840 18732 poll_s Ssl ? 0:00 /usr/bin/python3 -Es
/usr/sbin/firewalld --nofork -1 0 204 1 20 0 100968 80 skb_wa
Ss ? 0:00 /usr/sbin/saslauthd -a pam -c -m /var/spool/postfix1 0
205 204 20 0 100968 92 lock_f S ? 0:00
/usr/sbin/saslauthd -a pam -c -m /var/spool/postfix5 118 261 1 20 0
76184 15964 poll_s Ss ? 0:00 postgrey
--pidfile=/var/run/postgrey/postgrey.pid -4 106 478 1 20 0 287428
12804 sigsus Ssl ? 0:00 /usr/sbin/named -f -u bind
4 0 489 1 20 0 184288 7800 poll_s Ssl ? 0:00
/usr/bin/python3 /usr/share/unattended-upgrades/una4 0 505 1 20 0
1036648 13412 poll_s Ssl ? 39:19 /usr/bin/python3
/usr/bin/fail2ban-server -xf start4 0 523 1 20 0 72288 916
poll_s Ss ? 0:00 /usr/sbin/sshd -D
0 999 526 1 20 0 4192092 693668 futex_ Sl ? 42:25
/usr/lib/jvm/java-11-openjdk-amd64/bin/java -Djava.1 0 542 1 20 0
24176 256 poll_s Ss ? 0:00 /usr/sbin/xinetd -pidfile
/run/xinetd.pid -stayaliv5 0 555 1 20 0 400524 16044 poll_s Ss ?
0:44 /usr/sbin/apache2 -k start
1 0 579 1 20 0 81052 18024 poll_s Ss ? 0:12
/usr/bin/perl /usr/share/usermin/miniserv.pl /etc/u1 0 581 1 20 0
87416 15492 poll_s Ss ? 0:34 /usr/bin/perl
/usr/share/webmin/miniserv.pl /etc/we5 33 3714 555 20 0 400956 9468
ep_pol S ? 0:00 /usr/sbin/apache2 -k start
5 33 3716 555 20 0 400892 9352 SYSC_s S ? 0:00
/usr/sbin/apache2 -k start
4 0 5194 1 20 0 76500 1740 ep_pol Ss ? 0:00
/lib/systemd/systemd --user
5 0 5195 5194 20 0 261960 7528 sigtim S ? 0:00 (sd-pam)
4 0 5342 1 20 0 289044 2016 poll_s Ssl ? 0:07
/usr/lib/policykit-1/polkitd --no-debug
4 101 5968 1 20 0 71848 156 ep_pol Ss ? 0:00
/lib/systemd/systemd-networkd
4 0 5975 1 20 0 197976 49068 ep_pol Ss ? 0:12
/lib/systemd/systemd-journald
4 0 6087 1 20 0 42092 308 ep_pol Ss ? 0:00
/lib/systemd/systemd-udevd
5 114 6831 1 20 0 120580 2148 poll_s Ss ? 0:02 proftpd:
(accepting connections)
4 0 9525 5194 20 0 90368 224 poll_s SLs ? 0:00
/usr/bin/gpg-agent --supervised
1 0 9928 1 20 0 90368 288 poll_s Ss ? 0:00 gpg-agent
--homedir /root/.gnupg --use-standard-soc5 33 10880 555 20 0 400964
9324 SYSC_s S ? 0:00 /usr/sbin/apache2 -k start
4 113 11187 1 20 0 302396 6484 pause Ss ? 0:08
/usr/bin/freshclam -d --foreground=true
5 33 11901 555 20 0 400688 8748 SYSC_s S ? 0:00
/usr/sbin/apache2 -k start
4 0 13481 1 20 0 13008 844 poll_s Ss+ ? 0:00
/sbin/agetty -o -p -- \u --noclear tty2 linux
4 0 13482 1 20 0 13008 844 poll_s Ss+ ? 0:00
/sbin/agetty -o -p -- \u --noclear --keep-baud cons4 0 17557 523 20 0
101548 4356 poll_s Ss ? 0:00 sshd: domain [priv]
5 1000 17572 17557 20 0 101548 1960 poll_s R ? 0:00 sshd:
domain@pts/0
0 1000 17573 17572 20 0 18628 2128 wait Ss pts/0 0:00 -bash
0 1000 17583 17573 20 0 25936 1276 - R+ pts/0 0:00 ps -alx
4 0 18418 1 20 0 317440 1580 ep_pol Ss ? 0:34 php-fpm:
master process (/etc/php/7.2/fpm/php-fpm.c5 33 18419 18418 20 0 317440
1452 skb_wa S ? 0:00 php-fpm: pool www
5 33 18420 18418 20 0 317440 1448 skb_wa S ? 0:00 php-fpm:
pool www
5 33 22504 555 20 0 182440 5768 poll_s S ? 0:00
/usr/sbin/apache2 -k start
5 33 23288 555 20 0 400988 9672 SYSC_s S ? 0:00
/usr/sbin/apache2 -k start
The command journalctl -b -u systemd-logind starts with Feb-07 so there
are A LOT of records there. Maybe a grep of something will show only the
important stuff?
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https://bugs.launchpad.net/bugs/1863228
Title:
loginctl list-sessions shows ghost sessions that are never completely
closed
Status in systemd package in Ubuntu:
Incomplete
Bug description:
I setup a new VPS with ubuntu 18.04.4, including virtualmin/usermin.
In auth.log I see a lot of
su[12936]: Successful su for domain by root
su[12936]: + ??? root:domain
systemd-logind[148]: New session c315 of user domain .
su[12936]: pam_unix(su:session): session opened for user domain by (uid=0)
su[12936]: pam_unix(su:session): session closed for user domain
in syslog, I see a lot of
systemd[1]: Started Session c314 of user domain.
systemd[1]: Started Session c315 of user domain.
domain is the user of my virtual server defined in the VPS. c314/c315
increased by 1 each time, every 5 minutes (see explanation below).
When running `loginctl list-sessions` those sessions number grow as
"active=yes" and "state=closing" and never disappear from the list.
a random session as an example:
loginctl session-status c315
c315 - domain (1000)
Since: Sat 2020-02-08 20:27:08 UTC; 23h ago
Leader: 12936
TTY: ???
Remote: user root
Service: su; type tty; class user
State: closing
Unit: session-c315.scope
I did a simple test: logged in with ssh, logged out (exit) and re-
logged in. I saw 2 sessions in loginctl list-sessions and the previous
one, which I obviously closed, never disappeared from the list.
as a "bonus": Virtualmin apparently open/close a session for the
virtual server user to do its stuff causing the number of ghost
sessions to grow forever...
I posted this question in server fault, askubuntu, ubuntuforums and
virtualmin - no one knew what to tell me. I have no idea what/where to
look for... Please advice :) Thanks in advance.
FWIW: Someone from virtualmin forum told me that he had a similar
problem with debian 9 and it was fixed in debian 10.
After a boot I see this, maybe related?
Feb 13 06:39:48 domain systemd[1]: Starting User Manager for UID 1000...
Feb 13 06:39:48 domain systemd[636]: Failed to create
/user.slice/user-1000.slice/user@1000.service/init.scope control group:
Permission denied
Feb 13 06:39:48 domain systemd[636]: Failed to allocate manager object:
Permission denied
Feb 13 06:39:48 domain systemd[1]: user@1000.service: Failed with result
'protocol'.
Feb 13 06:39:48 domain systemd[1]: Failed to start User Manager for UID 1000
lsb_release -a; uname -a; grep 1000 /etc/passwd
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 18.04.4 LTS
Release: 18.04
Codename: bionic
Linux domain.com 4.15.0 #1 SMP Mon Dec 9 19:36:21 MSK 2019 x86_64 x86_64
x86_64 GNU/Linux
domain:x:1000:1000::/home/domain:/bin/bash
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