/root @ localhost ~ # the chkconfig -- list sipdev_linux

Note: This output shows SysV services only and does not include native
Systemd services. SysV configuration data took a be overridden by native
Systemd configuration.

If you want to list systemd services use 'systemctl list - unit - files'.
To see the services enabled on particular target use
'systemctl list - dependencies (target)'.

Sipdev_linux 0: off 1:2: off on 3: on 4: on 5: on 6: off
/root @ localhost ~ # service sipdev_linux status
The status sipdev_linux is running. The Pid is 18242
/root @ localhost ~ # service sipdev_linux stop
/root @ localhost ~ # service sipdev_linux start
Start sipdev_linux start success
/root @ localhost ~ # service sipdev_linux restart
Start sipdev_linux start success
/root @ localhost ~ # service sipdev_linux status
The status sipdev_linux is running. The Pid is 26782
/root @ localhost ~ # systemctl list - unit - files | grep sipdev_linux
Sipdev_linux. Service enabled
/root @ localhost ~ #

[b] the service script is as follows:
[Unit]
Description=sipdev_linux
After=sipdev_linux. Target

[Service]
Type=forking
ExecStart=/etc/init. D/sipdev_linux start
ExecStop=/etc/init. D/sipdev_linux stop
ExecStartPost=/etc/init. D/sipdev_linux status
ExecReload=/etc/init. D/sipdev_linux restart
PrivateTmp=true
# RemainAfterExit=yes
# want more user goals
[Install]
WantedBy=multi - user. Target
~
~
~

Sipdev_linux script content is as follows:
#!/bin/sh
# the chkconfig: 2345 65 66
# description: Self Monitoring and Reporting Technology (SMART) Daemon
# openresty - this script starts and stops the sipdev_linux sipdec_start
#
# open sipdev_linux service


# [-f/etc/rc. D/init. D/functions provides] & amp; & ./etc/rc. D/init. D/functions provides
# define some user variable
APP_HOME=/home/home directory sipdev_new20210302 # program
APP_NAME=sipdev_linux # program (scripts directory)
# LOG_FILE=siplog. TXT output log file

# instructions, used to prompt the input parameter
The usage () {
Echo "Usage: sh sipdev_linux [start | stop | restart | status]"
The exit 1
}

# to check whether the program is running
Is_exist () {
# pid=` pgrep - l - o $APP_NAME | awk '{print $1}' `
# pid=` ps - ef | grep "$APP_NAME" | grep -v grep | awk '{print $2}' `
Pid=` ps - x | grep "$APP_NAME" | grep 'sipdev_linux $| grep -v grep | awk' {print $1} '`
# if there is no return 0, existence return 1
If [-z "$pid"]; Then
Return 0
The else
Return 1
Fi
}

# start
Start () {
Is_exist
If [$? - eq 1); Then
Echo "start at ${APP_NAME} is already running. The pid=${pid}."
The else
CD $APP_HOME; Nohup $$APP_NAME APP_HOME/2 & gt;/dev/null & amp;
Start success "echo" start at ${APP_NAME}
Fi
}

# stop
Stop () {
Is_exist
If [$? - eq 1); Then
Kill 9 $pid
The else
Echo "stop ${APP_NAME} is not running"
Fi
}

# the running state of the output
The status () {
Is_exist
If [$? - eq 1); Then
Echo "${APP_NAME} is running status. The Pid is ${Pid}"
The else
Echo "${APP_NAME} is NOT running status."
Fi
}

# restart
Restart () {
Stop
Start
}

# according to the input parameters, choose to perform the corresponding methods, no input, according to the instructions
Case "$1" in
"Start")
Start
;;
"Stop")
Stop
;;
"Status")
The status
;;
"Restart")
Restart
;;
*)
The usage
;;
Esac