I have a bash script I made which when run on each of my computers, detects the number of CPU cores, HDDs/partitions, battery present or not, etc, and generate a conkyrc file to display the relevant info for that PC using the style I prefer in my conky. I am having difficulty determining whether the PC is on a wired or wireless internet connection however.
Does anyone know a way to determine the type of connection with a bash script?
Try this:
tail -n+3 /proc/net/wireless | grep -q . && echo "We are wireless"
On a hardwired system, the contents of /proc/net/wireless consist of two header lines:
# cat /proc/net/wireless
Inter-| sta-| Quality | Discarded packets | Missed | WE
face | tus | link level noise | nwid crypt frag retry misc | beacon | 22
On a system with an active wireless interface, there will be a third line displaying data about that interface.
The command above works as follows
The tail -n+3 command is used to remove the header.
The grep -q . command tests for the presence of subsequent lines that are present if a wireless interface is active.
iwconfig is a utility that reads information from /proc/net/wireless:
iwconfig 2>&1 | grep -q ESSID && echo "We are wireless"