Linux Command

1:cron

crontab -e
@reboot python3 /home/pi/my_program.py &
sudo reboot
ps aux
crontab -l
ps aux | grep python
sudo kill -9 
sudo killall python3


2:systemd

sudo nano /etc/systemd/system/ex_led.service

[Unit]
Description=Run ex_led.py on startup
After=multi-user.target

[Service]
ExecStart=/usr/bin/python3 /home/pi/ex_led.py
WorkingDirectory=/home/pi
StandardOutput=inherit
StandardError=inherit
Restart=always
User=pi

[Install]
WantedBy=multi-user.target

sudo systemctl daemon-reload
sudo systemctl start my_program.service
sudo systemctl stop my_program.service
sudo systemctl enable my_program.service
sudo systemctl disable my_program.service
sudo systemctl status my_program.service
sudo reboot

3:rc.local

sudo nano /etc/rc.local
sudo python3 /home/pi/my_program.py &

4:&

python3 /path/to/ex_pwm.py &
help jobs
jobs
fg
fg %1

5:nohup

nohup python3 /path/to/ex_pwm.py &
cat nohup.out
nohup python3 /path/to/ex_pwm.py > /path/to/output.log 2>&1 &

6:

which python3
@reboot sleep 10 && /usr/bin/python3 /path/to/ex_led.py

[Unit]
Description=Run ex_led.py on startup
After=multi-user.target

[Service]
ExecStart=/usr/bin/python3 /path/to/ex_led.py
WorkingDirectory=/home/pi
StandardOutput=inherit
StandardError=inherit
Restart=always
User=pi

[Install]
WantedBy=multi-user.target

7:

grep CRON /var/log/syslog
@reboot /usr/bin/python3 /path/to/ex_led.py > /home/pi/ex_led.log 2>&1
sudo chmod 644 /etc/systemd/system/ex_led.service
sudo chown root:root /etc/systemd/system/ex_led.service

8:

sudo lsof -i :8080
sudo kill -9 ＜pid＞
sudo netstat -tuln | grep 8080

9:

ssh pi@172.16.54.134
sudo -i
whoami
su -
sudo systemctl restart ssh
exit
su pi
sudo -u pi -i

10: