How to setup a systemd service with root access?
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Description
I am trying to make a systemd service file to run a python script to print something using thermal printer. escpos is the library I am using to access the control of thermal printer. However escpos require sudo to access the usb device.
Question
How to make a systemd service file such that the exec command get the root access? Base on some answer on internet, if I don't set anything to User, the default exec should get root access automatically. But I still getting trouble to make my program run. Hope anyone can help me to spot my mistake.
Code
python
File: /usr/local/etc/test/testPrint.py
from escpos.printer import Usb
#require escpos use "pip install python-escpos" to install the library
""" Seiko Epson Corp. Receipt Printer (EPSON TM-T88III) """
p = Usb(0x4b43, 0x3538, 0, 0x82, 0x02)
p.text("Hello Worldn")
p.text("nnn")
p.cut()
I can run sudo python3 /usr/local/etc/test/testPrint.py and print the text from the thermal printer without any problem.
Service File
File: /etc/systemd/system/testPrint.service
[Unit]
Description=Test Python escpos print
After=network.target
[Service]
Type=oneshot
ExecStart=/usr/bin/python3 /usr/local/etc/test/testPrint.py
[Install]
WantedBy=multi-user.target
And when I try to run the command sudo systemctl start testPrint.service. It gives error
Error log
Command: sudo journalctl -u testPrint.service:
python3.5[27149]: Traceback (most recent call last):
python3.5[27149]: File "/usr/local/etc/test/testPrint.py",
python3.5[27149]: from escpos.printer import Usb
python3.5[27149]: ImportError: No module named 'escpos'
systemd[1]: testPrint.service: Main process exited, code=exit
systemd[1]: Failed to start Test python escpos print.
systemd[1]: testPrint.service: Unit entered failed state.
systemd[1]: testPrint.service: Failed with result 'exit-code'
Which is the same error, if I run python without sudo "python3 printTest.py"
Edit:
Just to give out some extra info. I use sudo pip3 install python-escpos to install the module.
My OS is Ubuntu 16.04
python sudo systemd services
asked Nov 19 at 14:10
Wan Chap
112
add a comment |
up vote
1
down vote
favorite
Description
I am trying to make a systemd service file to run a python script to print something using thermal printer. escpos is the library I am using to access the control of thermal printer. However escpos require sudo to access the usb device.
Question
How to make a systemd service file such that the exec command get the root access? Base on some answer on internet, if I don't set anything to User, the default exec should get root access automatically. But I still getting trouble to make my program run. Hope anyone can help me to spot my mistake.
Code
python
File: /usr/local/etc/test/testPrint.py
from escpos.printer import Usb
#require escpos use "pip install python-escpos" to install the library
""" Seiko Epson Corp. Receipt Printer (EPSON TM-T88III) """
p = Usb(0x4b43, 0x3538, 0, 0x82, 0x02)
p.text("Hello Worldn")
p.text("nnn")
p.cut()
I can run sudo python3 /usr/local/etc/test/testPrint.py and print the text from the thermal printer without any problem.
Service File
File: /etc/systemd/system/testPrint.service
[Unit]
Description=Test Python escpos print
After=network.target
[Service]
Type=oneshot
ExecStart=/usr/bin/python3 /usr/local/etc/test/testPrint.py
[Install]
WantedBy=multi-user.target
And when I try to run the command sudo systemctl start testPrint.service. It gives error
Error log
Command: sudo journalctl -u testPrint.service:
python3.5[27149]: Traceback (most recent call last):
python3.5[27149]: File "/usr/local/etc/test/testPrint.py",
python3.5[27149]: from escpos.printer import Usb
python3.5[27149]: ImportError: No module named 'escpos'
systemd[1]: testPrint.service: Main process exited, code=exit
systemd[1]: Failed to start Test python escpos print.
systemd[1]: testPrint.service: Unit entered failed state.
systemd[1]: testPrint.service: Failed with result 'exit-code'
Which is the same error, if I run python without sudo "python3 printTest.py"
Edit:
Just to give out some extra info. I use sudo pip3 install python-escpos to install the module.
My OS is Ubuntu 16.04
python sudo systemd services
asked Nov 19 at 14:10
Wan Chap
112
2
How did you installescpos?sudo pip3 install escposorpip3 install escpos? Or was this in a virtualenv you used for escpos? Because you need the module installed systemwide withsudo pip3 installfor it to be able to useescpos.
– Thomas Ward♦
Nov 19 at 14:16
I use sudo pip3 install python-escpos to install the library
– Wan Chap
Nov 19 at 17:26
2
Welcome to Ask Ubuntu! Please don’t put the solution into the question. Use the answer field below instead. askubuntu.com/help/self-answer Also don’t add “SOLVED” to the title. In order to mark your question solved in the right way, you may accept the answer (by clicking on the tick mark (✓) next to it) that helped you. In case the helpful answer was posted by you, you'll have to wait 2 days before being able to accept it.
– Melebius
Nov 22 at 9:12
Thanks for the tips, I am still learning to be a part of AskUbuntu community.
– Wan Chap
Nov 22 at 10:01
add a comment |
up vote
1
down vote
favorite
up vote
1
down vote
favorite
Description
I am trying to make a systemd service file to run a python script to print something using thermal printer. escpos is the library I am using to access the control of thermal printer. However escpos require sudo to access the usb device.
Question
How to make a systemd service file such that the exec command get the root access? Base on some answer on internet, if I don't set anything to User, the default exec should get root access automatically. But I still getting trouble to make my program run. Hope anyone can help me to spot my mistake.
Code
python
File: /usr/local/etc/test/testPrint.py
from escpos.printer import Usb
#require escpos use "pip install python-escpos" to install the library
""" Seiko Epson Corp. Receipt Printer (EPSON TM-T88III) """
p = Usb(0x4b43, 0x3538, 0, 0x82, 0x02)
p.text("Hello Worldn")
p.text("nnn")
p.cut()
I can run sudo python3 /usr/local/etc/test/testPrint.py and print the text from the thermal printer without any problem.
Service File
File: /etc/systemd/system/testPrint.service
[Unit]
Description=Test Python escpos print
After=network.target
[Service]
Type=oneshot
ExecStart=/usr/bin/python3 /usr/local/etc/test/testPrint.py
[Install]
WantedBy=multi-user.target
And when I try to run the command sudo systemctl start testPrint.service. It gives error
Error log
Command: sudo journalctl -u testPrint.service:
python3.5[27149]: Traceback (most recent call last):
python3.5[27149]: File "/usr/local/etc/test/testPrint.py",
python3.5[27149]: from escpos.printer import Usb
python3.5[27149]: ImportError: No module named 'escpos'
systemd[1]: testPrint.service: Main process exited, code=exit
systemd[1]: Failed to start Test python escpos print.
systemd[1]: testPrint.service: Unit entered failed state.
systemd[1]: testPrint.service: Failed with result 'exit-code'
Which is the same error, if I run python without sudo "python3 printTest.py"
Edit:
Just to give out some extra info. I use sudo pip3 install python-escpos to install the module.
My OS is Ubuntu 16.04
python sudo systemd services
asked Nov 19 at 14:10
Wan Chap
112
Description
I am trying to make a systemd service file to run a python script to print something using thermal printer. escpos is the library I am using to access the control of thermal printer. However escpos require sudo to access the usb device.
Question
How to make a systemd service file such that the exec command get the root access? Base on some answer on internet, if I don't set anything to User, the default exec should get root access automatically. But I still getting trouble to make my program run. Hope anyone can help me to spot my mistake.
Code
python
File: /usr/local/etc/test/testPrint.py
from escpos.printer import Usb
#require escpos use "pip install python-escpos" to install the library
""" Seiko Epson Corp. Receipt Printer (EPSON TM-T88III) """
p = Usb(0x4b43, 0x3538, 0, 0x82, 0x02)
p.text("Hello Worldn")
p.text("nnn")
p.cut()
I can run sudo python3 /usr/local/etc/test/testPrint.py and print the text from the thermal printer without any problem.
Service File
File: /etc/systemd/system/testPrint.service
[Unit]
Description=Test Python escpos print
After=network.target
[Service]
Type=oneshot
ExecStart=/usr/bin/python3 /usr/local/etc/test/testPrint.py
[Install]
WantedBy=multi-user.target
And when I try to run the command sudo systemctl start testPrint.service. It gives error
Error log
Command: sudo journalctl -u testPrint.service:
python3.5[27149]: Traceback (most recent call last):
python3.5[27149]: File "/usr/local/etc/test/testPrint.py",
python3.5[27149]: from escpos.printer import Usb
python3.5[27149]: ImportError: No module named 'escpos'
systemd[1]: testPrint.service: Main process exited, code=exit
systemd[1]: Failed to start Test python escpos print.
systemd[1]: testPrint.service: Unit entered failed state.
systemd[1]: testPrint.service: Failed with result 'exit-code'
Which is the same error, if I run python without sudo "python3 printTest.py"
Edit:
Just to give out some extra info. I use sudo pip3 install python-escpos to install the module.
My OS is Ubuntu 16.04
python sudo systemd services
python sudo systemd services
asked Nov 19 at 14:10
Wan Chap
112
asked Nov 19 at 14:10
Wan Chap
112
edited Nov 22 at 9:59
asked Nov 19 at 14:10
Wan Chap
112
asked Nov 19 at 14:10
Wan Chap
112
asked Nov 19 at 14:10
Wan Chap
112
112
2
How did you installescpos?sudo pip3 install escposorpip3 install escpos? Or was this in a virtualenv you used for escpos? Because you need the module installed systemwide withsudo pip3 installfor it to be able to useescpos.
– Thomas Ward♦
Nov 19 at 14:16
I use sudo pip3 install python-escpos to install the library
– Wan Chap
Nov 19 at 17:26
2
Welcome to Ask Ubuntu! Please don’t put the solution into the question. Use the answer field below instead. askubuntu.com/help/self-answer Also don’t add “SOLVED” to the title. In order to mark your question solved in the right way, you may accept the answer (by clicking on the tick mark (✓) next to it) that helped you. In case the helpful answer was posted by you, you'll have to wait 2 days before being able to accept it.
– Melebius
Nov 22 at 9:12
Thanks for the tips, I am still learning to be a part of AskUbuntu community.
– Wan Chap
Nov 22 at 10:01
add a comment |
2
How did you installescpos?sudo pip3 install escposorpip3 install escpos? Or was this in a virtualenv you used for escpos? Because you need the module installed systemwide withsudo pip3 installfor it to be able to useescpos.
– Thomas Ward♦
Nov 19 at 14:16
I use sudo pip3 install python-escpos to install the library
– Wan Chap
Nov 19 at 17:26
2
Welcome to Ask Ubuntu! Please don’t put the solution into the question. Use the answer field below instead. askubuntu.com/help/self-answer Also don’t add “SOLVED” to the title. In order to mark your question solved in the right way, you may accept the answer (by clicking on the tick mark (✓) next to it) that helped you. In case the helpful answer was posted by you, you'll have to wait 2 days before being able to accept it.
– Melebius
Nov 22 at 9:12
Thanks for the tips, I am still learning to be a part of AskUbuntu community.
– Wan Chap
Nov 22 at 10:01
2
2
How did you install
escpos? sudo pip3 install escpos or pip3 install escpos? Or was this in a virtualenv you used for escpos? Because you need the module installed systemwide with sudo pip3 install for it to be able to use escpos.– Thomas Ward♦
Nov 19 at 14:16
How did you install
escpos? sudo pip3 install escpos or pip3 install escpos? Or was this in a virtualenv you used for escpos? Because you need the module installed systemwide with sudo pip3 install for it to be able to use escpos.– Thomas Ward♦
Nov 19 at 14:16
I use sudo pip3 install python-escpos to install the library
– Wan Chap
Nov 19 at 17:26
I use sudo pip3 install python-escpos to install the library
– Wan Chap
Nov 19 at 17:26
2
2
Welcome to Ask Ubuntu! Please don’t put the solution into the question. Use the answer field below instead. askubuntu.com/help/self-answer Also don’t add “SOLVED” to the title. In order to mark your question solved in the right way, you may accept the answer (by clicking on the tick mark (✓) next to it) that helped you. In case the helpful answer was posted by you, you'll have to wait 2 days before being able to accept it.
– Melebius
Nov 22 at 9:12
Welcome to Ask Ubuntu! Please don’t put the solution into the question. Use the answer field below instead. askubuntu.com/help/self-answer Also don’t add “SOLVED” to the title. In order to mark your question solved in the right way, you may accept the answer (by clicking on the tick mark (✓) next to it) that helped you. In case the helpful answer was posted by you, you'll have to wait 2 days before being able to accept it.
– Melebius
Nov 22 at 9:12
Thanks for the tips, I am still learning to be a part of AskUbuntu community.
– Wan Chap
Nov 22 at 10:01
Thanks for the tips, I am still learning to be a part of AskUbuntu community.
– Wan Chap
Nov 22 at 10:01
add a comment |
1 Answer
1
active
oldest
votes
up vote
0
down vote
I have solved the problem.
This bug is not caused by root permission, but rather the escpos module are not install correctly under root user. After I reinstall the escpos by sudo pip3 install python-escpos all codes work accordingly and is able to print the text.
answered Nov 22 at 9:58
Wan Chap
112
add a comment |
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
0
down vote
I have solved the problem.
This bug is not caused by root permission, but rather the escpos module are not install correctly under root user. After I reinstall the escpos by sudo pip3 install python-escpos all codes work accordingly and is able to print the text.
answered Nov 22 at 9:58
Wan Chap
112
add a comment |
up vote
0
down vote
I have solved the problem.
This bug is not caused by root permission, but rather the escpos module are not install correctly under root user. After I reinstall the escpos by sudo pip3 install python-escpos all codes work accordingly and is able to print the text.
answered Nov 22 at 9:58
Wan Chap
112
add a comment |
up vote
0
down vote
up vote
0
down vote
I have solved the problem.
This bug is not caused by root permission, but rather the escpos module are not install correctly under root user. After I reinstall the escpos by sudo pip3 install python-escpos all codes work accordingly and is able to print the text.
answered Nov 22 at 9:58
Wan Chap
112
I have solved the problem.
This bug is not caused by root permission, but rather the escpos module are not install correctly under root user. After I reinstall the escpos by sudo pip3 install python-escpos all codes work accordingly and is able to print the text.
answered Nov 22 at 9:58
Wan Chap
112
answered Nov 22 at 9:58
Wan Chap
112
answered Nov 22 at 9:58
Wan Chap
112
answered Nov 22 at 9:58
Wan Chap
112
112
add a comment |
add a comment |
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2
How did you install
escpos?sudo pip3 install escposorpip3 install escpos? Or was this in a virtualenv you used for escpos? Because you need the module installed systemwide withsudo pip3 installfor it to be able to useescpos.– Thomas Ward♦
Nov 19 at 14:16
I use sudo pip3 install python-escpos to install the library
– Wan Chap
Nov 19 at 17:26
2
Welcome to Ask Ubuntu! Please don’t put the solution into the question. Use the answer field below instead. askubuntu.com/help/self-answer Also don’t add “SOLVED” to the title. In order to mark your question solved in the right way, you may accept the answer (by clicking on the tick mark (✓) next to it) that helped you. In case the helpful answer was posted by you, you'll have to wait 2 days before being able to accept it.
– Melebius
Nov 22 at 9:12
Thanks for the tips, I am still learning to be a part of AskUbuntu community.
– Wan Chap
Nov 22 at 10:01