Difference between revisions of "Linux cheat sheet"
Directive0 (Talk | contribs) |
Directive0 (Talk | contribs) |
||
| Line 1: | Line 1: | ||
Most of these tips are useful with the Raspberry Pi. | Most of these tips are useful with the Raspberry Pi. | ||
| − | ==Run a process beyond an SSH session | + | ==Run a process beyond an SSH session== |
Useful for SSH’n into a machine and then starting a process and being able to close the session without killing the job. Also useful for running multiple programs in one ssh session. | Useful for SSH’n into a machine and then starting a process and being able to close the session without killing the job. Also useful for running multiple programs in one ssh session. | ||
| Line 16: | Line 16: | ||
screen -x myjob | screen -x myjob | ||
| − | ==Run a program on a remote display | + | ==Run a program on a remote display== |
When you run graphical programs over SSH the server will often throw errors about no screen being present. You need to put the display you want have the program to display to in your environment. You can do this by first runing “w” to see connected displays and then: | When you run graphical programs over SSH the server will often throw errors about no screen being present. You need to put the display you want have the program to display to in your environment. You can do this by first runing “w” to see connected displays and then: | ||
| Line 27: | Line 27: | ||
python samplepythoncode.py | python samplepythoncode.py | ||
| − | ==Quickly determine Pi CPU temperature | + | ==Quickly determine Pi CPU temperature== |
Run the following command in terminal. | Run the following command in terminal. | ||
/opt/vc/bin/vcgencmd measure_temp | /opt/vc/bin/vcgencmd measure_temp | ||
| − | ==Set up wifi on a Pi with simple file | + | ==Set up wifi on a Pi with simple file== |
Create a file called “wpa_supplicant.conf” with the following content and place at root of “boot” | Create a file called “wpa_supplicant.conf” with the following content and place at root of “boot” | ||
Revision as of 10:03, 19 April 2019
Most of these tips are useful with the Raspberry Pi.
Contents
Run a process beyond an SSH session
Useful for SSH’n into a machine and then starting a process and being able to close the session without killing the job. Also useful for running multiple programs in one ssh session.
Install screen if you haven’t already
sudo apt-get install screen -y
Run screen on the server and use -S flag to give the session a name.
screen -S myjob
Log in via ssh from the remote machine and use the -x flag to attach to that session
screen -x myjob
Run a program on a remote display
When you run graphical programs over SSH the server will often throw errors about no screen being present. You need to put the display you want have the program to display to in your environment. You can do this by first runing “w” to see connected displays and then:
Run export to bring the proper display into your environment.
export DISPLAY=:0
Run your program.
python samplepythoncode.py
Quickly determine Pi CPU temperature
Run the following command in terminal.
/opt/vc/bin/vcgencmd measure_temp
Set up wifi on a Pi with simple file
Create a file called “wpa_supplicant.conf” with the following content and place at root of “boot”
network={
ssid="SSID Name"
psk="Password"
key_mgmt=WPA-PSK
}
