Thank you for your reply.
I tried to output information.
Please let me know if you notice.
You can make an ftp connection for about 1 minute before xinetd times out.
The display of xinetd in Plesk is n/a.
CT-999-bash-4.2#
CT-999-bash-4.2#
CT-999-bash-4.2# ps fauxwww
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root         1  0.0  0.0 194988  2984 ?        Ss   Aug11   2:05 /usr/lib/systemd/systemd --system --deserialize 22
root         2  0.0  0.0      0     0 ?        S    Aug11   0:00 [kthreadd/101]
root         3  0.0  0.0      0     0 ?        S    Aug11   0:01  \_ [khelper/101]
root        93  0.0  0.3 208040 14364 ?        Ss   Aug11   1:37 /usr/lib/systemd/systemd-journald
dbus       129  0.0  0.0  58088  1204 ?        Ss   Aug11   0:41 /usr/bin/dbus-daemon --system --address=systemd: --nofork --nopidfile --systemd-activation
root       132  0.0  0.0  26340  1100 ?        Ss   Aug11   0:14 /usr/lib/systemd/systemd-logind
root       140  0.0  0.0   6472   480 tty2     Ss+  Aug11   0:00 /sbin/agetty --noclear tty2 linux
root       141  0.0  0.0 110164   488 tty1     Ss+  Aug11   0:00 /sbin/agetty --noclear --keep-baud console 115200,38400,9600 vt220
root       142  0.0  0.0 126392   944 ?        Ss   Aug11   0:00 /usr/sbin/crond -n
root       190  0.0  0.0  74412   248 ?        Ss   Aug11   0:00 /usr/sbin/saslauthd -m /run/saslauthd -a pam -n 2
root       191  0.0  0.0  74412    24 ?        S    Aug11   0:00  \_ /usr/sbin/saslauthd -m /run/saslauthd -a pam -n 2
root       442  0.0  0.0  11752   744 ?        Ss   Aug11   0:12 /usr/sbin/dovecot -F
dovecot    481  0.0  0.0   9572   840 ?        S    Aug11   0:07  \_ dovecot/anvil
root       482  0.0  0.0   9572   764 ?        S    Aug11   0:04  \_ dovecot/log
root       443  0.0  0.0 112880  1864 ?        Ss   Aug11   0:30 /usr/sbin/sshd -D
root       444  0.0  0.1 865160  4396 ?        Ssl  Aug11   3:31 /usr/sbin/rsyslogd -n
root       494  0.0  0.0  52052   704 ?        Ss   Aug11   0:00 sw-cp-server: master process /usr/sbin/sw-cp-serverd -c /etc/sw-cp-server/config
sw-cp-s+   495  0.0  0.0  52980  2996 ?        S    Aug11   0:06  \_ sw-cp-server: worker process
mysql      511  0.0  0.0 113372   500 ?        Ss   Aug11   0:00 /bin/sh /usr/bin/mysqld_safe --basedir=/usr
mysql      714  0.7  6.1 1993304 256568 ?      Sl   Aug11 100:45  \_ /usr/libexec/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib64/mysql/plugin --log-error=/var/log/mariadb/mariadb.log --pid-file=/var/run/mariadb/mariadb.pid --socket=/var/lib/mysql/mysql.sock
named      548  0.0  1.6 324180 69752 ?        Ssl  Aug11   0:01 /usr/sbin/named -u named -t /var/named/chroot -c /etc/named.conf -u named -n 2
drweb      996  0.0 11.0 472876 464924 ?       Ss   Aug11   0:29 /opt/drweb/drwebd.real --foreground=yes
drweb     4944  0.0 11.0 472876 464848 ?       S    Aug20   0:00  \_ /opt/drweb/drwebd.real --foreground=yes
root      8141  0.0  0.0  43104   856 ?        Ss   Aug11   0:00 /usr/lib/systemd/systemd-udevd
postfix  19226  0.0  0.0 404748   812 ?        Ssl  Aug18   0:04 /usr/lib64/plesk-9.0/psa-pc-remote -p inet:
[email protected] -t 7210  -P /run/psa-pc-remote.pid -u postfix -g popuser -n
root     20214  0.0  0.3 478208 15780 ?        Ss   Aug18   0:01 sw-engine-fpm: master process (/etc/sw-engine/sw-engine-fpm.conf)
root      8305  0.0  0.1 255112  7472 ?        Ss   Aug19   0:05 /usr/sbin/httpd -DFOREGROUND
apache    8306  0.0  0.1 253684  4632 ?        S    Aug19   0:00  \_ /usr/sbin/httpd -DFOREGROUND
apache    8307  0.0  0.1 254992  4708 ?        S    Aug19   0:05  \_ /usr/sbin/httpd -DFOREGROUND
ftp-ton+ 29776  6.7  1.0 415276 44208 ?        S    00:52   0:01  |   \_ /usr/bin/php-cgi -c /var/www/vhosts/system/tonamiholdings.co.jp/etc/php.ini
ftp-ton+ 29788  3.7  1.0 415092 43812 ?        S    00:52   0:00  |   \_ /usr/bin/php-cgi -c /var/www/vhosts/system/tonami.co.jp/etc/php.ini
ftp-ton+ 29791  8.2  1.3 427292 55996 ?        S    00:52   0:00  |   \_ /usr/bin/php-cgi -c /var/www/vhosts/system/tonami.co.jp/etc/php.ini
apache    8308  0.0  0.4 2239844 18636 ?       Sl   Aug19   1:31  \_ /usr/sbin/httpd -DFOREGROUND
apache    8309  0.0  0.4 2239844 20504 ?       Sl   Aug19   1:47  \_ /usr/sbin/httpd -DFOREGROUND
apache    8335  0.0  0.5 2239844 21756 ?       Sl   Aug19   2:04  \_ /usr/sbin/httpd -DFOREGROUND
apache    8399  0.1  0.5 2239844 22296 ?       Sl   Aug19   3:06  \_ /usr/sbin/httpd -DFOREGROUND
apache   20171  0.1  0.5 2239844 22940 ?       Sl   Aug19   2:34  \_ /usr/sbin/httpd -DFOREGROUND
apache   24617  0.0  0.3 2239844 16144 ?       Sl   Aug20   0:03  \_ /usr/sbin/httpd -DFOREGROUND
apache   24668  0.0  0.3 2237712 16092 ?       Sl   Aug20   0:02  \_ /usr/sbin/httpd -DFOREGROUND
apache   24669  0.0  0.3 2237712 15492 ?       Sl   Aug20   0:02  \_ /usr/sbin/httpd -DFOREGROUND
apache   24796  0.0  0.3 2239844 14080 ?       Sl   Aug20   0:02  \_ /usr/sbin/httpd -DFOREGROUND
root     25113  0.0  0.0  89660  1560 ?        Ss   Aug19   0:13 /usr/libexec/postfix/master -w
postfix  25115  0.0  0.0  90024  1776 ?        S    Aug19   0:06  \_ qmgr -l -t fifo -u
postfix  25120  0.0  0.0  89872  1824 ?        S    Aug19   0:01  \_ tlsmgr -l -t unix -u
postfix  25165  0.0  0.0  89856  1820 ?        S    Aug19   0:01  \_ anvil -l -t unix -u
postfix  23797  0.0  0.0 125032  4056 ?        S    Aug20   0:00  \_ smtpd -n smtps -t inet -u -o stress= -s 2 -o smtpd_tls_wrappermode=yes
postfix  24534  0.0  0.0 125160  4136 ?        S    Aug20   0:00  \_ smtpd -n smtps -t inet -u -o stress= -s 2 -o smtpd_tls_wrappermode=yes
postfix  29324  0.0  0.0  89764  3848 ?        S    00:35   0:00  \_ pickup -l -t fifo -u
postfix  29601  0.0  0.1 125160  7552 ?        S    00:45   0:00  \_ smtpd -n smtps -t inet -u -o stress= -s 2 -o smtpd_tls_wrappermode=yes
postfix  29689  0.0  0.1 125116  7624 ?        S    00:49   0:00  \_ smtpd -n smtp -t inet -u -o stress= -s 2
postfix  29730  0.0  0.1 124944  6676 ?        S    00:50   0:00  \_ smtpd -n submission -t inet -u -o stress= -s 2 -o smtpd_enforce_tls=yes -o smtpd_tls_security_level=encrypt -o smtpd_sasl_auth_enable=yes -o smtpd_client_restrictions=permit_sasl_authenticated,reject -o smtpd_sender_restrictions= -o smtpd_recipient_restrictions=permit_mynetworks,permit_sasl_authenticated,reject_unauth_destination
postfix  29794  0.0  0.0  32800  2856 ?        S    00:52   0:00  \_ plesk_saslauthd -l -t unix -u status=5 listen=6 dbpath=/var/spool/postfix/plesk/passwd.db
root     29705  0.0  0.0  56196  1136 ?        Ss   00:49   0:00 vzctl: pts/0
root     29706  0.0  0.0 116168  2692 pts/0    Ss   00:49   0:00  \_ -bash
root     29798  0.0  0.0 155568  1904 pts/0    R+   00:53   0:00      \_ ps fauxwww
root     29786  5.0  1.8 293208 76896 ?        Ss   00:52   0:00 /usr/bin/spamd --pidfile /var/run/spamd.pid --nouser-config --username=popuser --daemonize --helper-home-dir=/var/qmail --virtual-config-dir=/var/qmail/mailnames/%d/%l/.spamassassin --create-prefs --max-children=1
popuser  29787  0.0  1.7 293208 74096 ?        S    00:52   0:00  \_ spamd child
CT-999-bash-4.2#
CT-999-bash-4.2#
CT-999-bash-4.2#
CT-999-bash-4.2# service xinetd restart
Redirecting to /bin/systemctl restart xinetd.service
Job for xinetd.service failed because a timeout was exceeded. See "systemctl status xinetd.service" and "journalctl -xe" for details.
CT-999-bash-4.2#
CT-999-bash-4.2#
CT-999-bash-4.2#
CT-999-bash-4.2# systemctl status xinetd.service
● xinetd.service - Xinetd A Powerful Replacement For Inetd
   Loaded: loaded (/usr/lib/systemd/system/xinetd.service; enabled; vendor preset: enabled)
   Active: failed (Result: timeout) since Fri 2020-08-21 00:56:36 JST; 1min 14s ago
  Process: 29854 ExecStart=/usr/sbin/xinetd -stayalive -pidfile /var/run/xinetd.pid $EXTRAOPTIONS (code=exited, status=0/SUCCESS)
Aug 21 00:55:06 vps101.xxxxxx.xx.jp xinetd[29855]: removing discard
Aug 21 00:55:06 vps101.xxxxxx.xx.jp xinetd[29855]: removing discard
Aug 21 00:55:06 vps101.xxxxxx.xx.jp xinetd[29855]: removing echo
Aug 21 00:55:06 vps101.xxxxxx.xx.jp xinetd[29855]: removing echo
Aug 21 00:55:06 vps101.xxxxxx.xx.jp xinetd[29855]: removing tcpmux
Aug 21 00:55:06 vps101.xxxxxx.xx.jp xinetd[29855]: removing time
Aug 21 00:55:06 vps101.xxxxxx.xx.jp xinetd[29855]: removing time
Aug 21 00:55:06 vps101.xxxxxx.xx.jp xinetd[29855]: xinetd Version 2.3.15 started with libwrap loadavg labeled-networking options compiled in.
Aug 21 00:55:06 vps101.xxxxxx.xx.jp xinetd[29855]: Started working: 2 available services
Aug 21 00:56:36 vps101.xxxxxx.xx.jp xinetd[29855]: unexpected signal: 18 (Continued) in signal pipe
CT-999-bash-4.2#
CT-999-bash-4.2#