This simple script will take a picture of a whiteboard and use parts of the ImageMagick library with sane defaults to clean it up tremendously.
The script is here:
#!/bin/bash
convert "$1" -morphology Convolve DoG:15,100,0 -negate -normalize -blur 0x1 -channel RBG -level 60%,91%,0.1 "$2"
This bash script offers quick shortcuts to simulate slower network connections. It is useful when you need to simulate a wireless network on a Linux network server, especially when you are using a virtual machine guest on your local machine or in the cloud.
slow 3G # Slow network on default eth0 down to 3G wireless speeds
slow reset # Reset connection for default eth0 to normal
slow vsat --latency=500ms # Simulate satellite internet with a high latency
slow dsl -b 1mbps # Simulate DSL with a slower speed than the default
slow modem-56k -d eth0 # Simulate a 56k modem on the eth1 device. eth0 is unchanged.