Basic-Ubuntu-Commands

Basic commands usually helpful when ubuntu is set up newly.

Permanently adding chmod to a device

sudo chmod 777 /dev/ttyUSB0
sudo usermod -aG dialout username

Replace username with your username and then logout and login to apply the changes.

Terminal History Up Arrow setup

gedit ~/.bashrc
bind '"\e[A": history-search-backward'
bind '"\e[B": history-search-forward'
source ~/.bashrc

Bind USB device under a static name

Add some udev rules. Edit the /etc/udev/rules.d/10-local.rules to contain:

ACTION=="add", ATTRS{idVendor}=="0403", ATTRS{idProduct}=="6001", SYMLINK+="my_uart"

Check for the variables of your device by running

udevadm info -a -p  $(udevadm info -q path -n /dev/ttyUSB0)

Setting up a wireless static IP on RaspberrPi

Run the following command on a terminal

sudo nano /etc/wpa_supplicant/wpa_supplicant.conf

Replace the text with the text below. Change ssid to your hotspot SSID. and psk with your hotspot password. Rest remain same

network={
ssid="username"
psk="password"
proto=RSN
key_mgmt=WPA-PSK
pairwise=CCMP
auth_alg=OPEN
}

Save the file and run the following command on a new terminal.

sudo nano /etc/network/interfaces

Replace the text with the text below. Change the address to desired static IP address.

# /etc/network/interfaces

auto wlan0

iface lo inet loopback
iface eth0 inet dhcp

allow-hotplug wlan0
iface wlan0 inet static
address 192.168.225.2
netmask 255.255.255.0
gateway 192.168.225.1
wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf
iface default inet dhcp

Restart RaspberryPi.

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