Linux

Use the following command to connect to the Tekceleo WLG-75-R piezo motor eval kit using the picocom terminal program:

picocom -b 9600 /dev/ttyACM0 --imap lfcrlf --echo

systemctl suspend

or

systemctl hibernate

Source & more information for really really old Linuxes

You can use udevadm to query information such as the USB device path for a given USB device such as /dev/usbtmc0:

udevadm info -q all /dev/usbtmc0

Example output:

P: /devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.3/1-1.3:1.0/usbmisc/usbtmc0
N: usbtmc0
L: 0
E: DEVPATH=/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.3/1-1.3:1.0/usbmisc/usbtmc0
E: DEVNAME=/dev/usbtmc0
E: MAJOR=180
E: MINOR=176
E: SUBSYSTEM=usbmisc

SUBSYSTEMS=="usb", ACTION=="add", ATTRS{idVendor}=="1313", ATTRS{idProduct}=="8078", GROUP="dialout", MODE="0666"

How to install:

sudo cp 99-thorlabs-pm100.rules /etc/udev/rules.d/
sudo udevadm control --reload-rules && sudo udevadm trigger

hwclock --set --date '2021-01-04 13:04:00'

#!/bin/bash
check_module() {
  local module="$1"
  if grep -Fxq "$module" /etc/modules
  then
    echo "$module already exists in /etc/modules"
  else
    echo "$module not found in /etc/modules. Adding it now..."
    echo "$module" | sudo tee -a /etc/modules
  fi
}

check_module "i2c-dev"

This script will at the module if it doesn’t exist in /etc/modules yet.

Note that it will only detect if exactly the same line as the argument to check_module is already present in /etc/modules. For example if i2c-dev option1=value1 is in /etc/modules, the script will only detect this line correctly if you call it like

check_module "i2c-dev option1=value1"

but not if you call it like

check_module "i2c-dev"

Problem:

When trying to run the VirtualHere USB client on Linux, you see the following error message:

$ ./vhuit64 
Please run with sudo
modprobe: ERROR: could not insert 'vhci_hcd': Operation not permitted

Solution:

Simply run vhuit64 using sudo:

sudo ./vhuit64

Problem:

You want to build a package using the fpm command, but you see the following error message:

fpm: command not found

Solution:

First, install rubygems:

sudo apt -y install rubygems

and now install fpm using rubygems:

sudo gem install fpm

Problem:

While trying to install libjpeg8-dev using apt or similar tools, you see the following error message:

Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Package libjpeg8-dev is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
However the following packages replace it:
  libjpeg62-turbo-dev:armhf libjpeg62-turbo-dev

E: Package 'libjpeg8-dev' has no installation candidate

Solution:

As you can see in the error message, the correct package name to install is now libjpeg62-turbo-dev. Therefore, install it using

sudo apt -y install libjpeg62-turbo-dev

Problem:

While I was trying to run sudo gparted, the following error occured:

X11 connection rejected because of wrong authentication.
Unable to init server: Could not connect: Connection refused

(gpartedbin:29293): Gtk-WARNING **: 01:55:02.070: cannot open display: localhost:10.0

Solution:

For me, the solution was to copy the .Xauthority file from the user uli I logged in as to root:

sudo cp ~$USER/.Xauthority /root

as this was required for the X11 program running as root to properly login to my local X11 server.

entr is a utility to automatically restart a script if one or more files change.

Installing it on Ubuntu as is as easy as

sudo apt -y install entr

This command will move all *.ics files from the current directory and

mkdir -p ICS
find . -name "*.ics" -type f -exec mv --backup=numbered -v {} ICS/ \;

Due to --backup=numbered, files with the same name won’t overwrite anything but instead mv will append a number such as ~2~ to the filename.