Lmorris at 16:07, 27 June 2025

2025-06-27T16:07:32Z

← Older revision		Revision as of 16:07, 27 June 2025
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	KillSignal=SIGINT		KillSignal=SIGINT
	Restart=on-failure		Restart=on-failure
	User=~~nandt-gateway~~		User=root

	[Install]		[Install]
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	</pre>		</pre>

	=== Step 2~~. Create the nandt-gateway user ===~~		=== Step 2. Get the daemon started ===

	~~<pre>~~
	~~sudo useradd --system --no-create-home --shell /sbin/nologin nandt-gateway~~
	~~</pre>~~

	~~Make sure the binary is executable by the user nandt-gateway:~~

	~~<pre>~~
	~~sudo chown root:nandt-gateway /opt/nan-dtdaemon/data-transport-daemon~~

	~~sudo chmod 750 /opt/nan-dtdaemon/data-transport-daemon~~
	~~</pre>~~

	~~=== Step 3~~. Get the daemon started ===

	<pre>		<pre>

Lmorris: Created page with "For Alma Linux 9.6, the standard

 service data-transport-daemon status

command doesn't work. Let's make the daemon work with systemctl. === Step 1. Create the service file. ===

 sudo vi /etc/systemd/system/data-transport-daemon.service

Enter the following lines in the file:

 [Unit] Description=Data Transport Daemon After=network.target  [Service] Type=forking ExecStart=/opt/nan-dtdaemon/data-transport-daemon TimeoutStopSec=10 KillSign..."

2025-06-20T20:39:42Z

Created page with "For Alma Linux 9.6, the standard <pre> service data-transport-daemon status </pre> command doesn't work. Let's make the daemon work with systemctl. === Step 1. Create the service file. === <pre> sudo vi /etc/systemd/system/data-transport-daemon.service </pre> Enter the following lines in the file: <pre> [Unit] Description=Data Transport Daemon After=network.target [Service] Type=forking ExecStart=/opt/nan-dtdaemon/data-transport-daemon TimeoutStopSec=10 KillSign..."

New page

For Alma Linux 9.6, the standard

<pre>
service data-transport-daemon status
</pre>

command doesn't work.

Let's make the daemon work with systemctl.

=== Step 1. Create the service file. ===

<pre>
sudo vi /etc/systemd/system/data-transport-daemon.service
</pre>

Enter the following lines in the file:
<pre>
[Unit]
Description=Data Transport Daemon
After=network.target

[Service]
Type=forking
ExecStart=/opt/nan-dtdaemon/data-transport-daemon
TimeoutStopSec=10
KillSignal=SIGINT
Restart=on-failure
User=nandt-gateway

[Install]
WantedBy=multi-user.target
</pre>

=== Step 2. Create the nandt-gateway user ===

<pre>
sudo useradd --system --no-create-home --shell /sbin/nologin nandt-gateway
</pre>

Make sure the binary is executable by the user nandt-gateway:

<pre>
sudo chown root:nandt-gateway /opt/nan-dtdaemon/data-transport-daemon

sudo chmod 750 /opt/nan-dtdaemon/data-transport-daemon
</pre>

=== Step 3. Get the daemon started ===

<pre>
sudo systemctl daemon-reload

sudo systemctl restart data-transport-daemon
</pre>

=== Helpful Commands ===

<pre>
systemctl start data-transport-daemon

systemctl stop data-transport-daemon

systemctl restart data-transport-daemon

systemctl status data-transport-daemon

# investigating problems
journalctl -xeu data-transport-daemon
</pre>

=== Bonus Material (very optional) ===

I like to get the status of a few things when I log onto one of the NMR spectrometer workstations remotely.

In my .bash_profile, I added:

<pre>
# Check if the shell is interactive
if [[ $- == *i* ]]; then
/home/lmorris/scripts/checkNDTS.sh
fi
</pre>

Edit the path and filename as appropriate.

My version of checkNDTS.sh is:

<pre>
#!/usr/bin/bash

# v 1.10 (2025.06jun.19)

# 1. see who's on the system
echo -e "\n\n================================================\n"

# for Alma Linux 9 use
user=$(who | awk '$2 == "seat0" { print $1 }')
# for Centos 7 use
# user=$(who | awk '$2 == ":0" { print $1 }')

if [ -n "$user" ]; then
echo "User: $user"
else
echo "No user logged into graphical session."
fi

echo ""

# 2. make sure the daemon is running

NDTS=$(systemctl status data-transport-daemon |grep Active)
CK_NDTS="active"

# Define ANSI color codes
RED="\033[0;31m"
# YELLOW="\033[0;33m" # for reference (not used)
GREEN="\033[0;32m"
# CYAN="\033[0;36m" # for reference (not used)
RESET="\033[0m" # Reset color back to default

# ndts daemon status
if [[ "$NDTS" == *"$CK_NDTS"* ]]; then
echo -e "${GREEN}NDTS daemon${RESET} status: ${GREEN}running${RESET}"
else
echo -e "${RED}NDTS daemon${RESET} status: ${RED}INACTIVE${RESET}"
fi

echo ""

# 3. check the port on gateway computer

HOST="128.192.9.245" # edit for the IP address of your gateway computer
PORT=60195 # port used by ndts to communicate to the gateway computer

if nc -z -w3 $HOST $PORT; then
echo "✅ Port $PORT is open on $HOST"
else
echo "❌ Port $PORT is NOT reachable on $HOST"
fi

echo -e "\n================================================\n"
</pre>

Alma Linux 9.6 - Creating systemctl capability - Revision history

Lmorris at 16:07, 27 June 2025