Using mtr in a bash script

[r00igev@@r]

Are there some bash experts here?
I want to use mtr in a script with as follows:
mtr -rw -c20 -a 10.0.0.102 102.132.201.1
The address 10.0.0.120 I want to get automatically from the ip a command for interface eth1 as it is a dhcp address.
Any ideas?

 

[ginggs]

mtr -rw -c20 -a `ip a show eth1  | awk '/inet /{print $2}' | cut -d/ -f1` 102.132.201.1

 

[shadow_man]

@ginggs any reasons you use backticks for command substitution as opposed to $() - or is it just habit?

 

[ginggs]

@ginggs any reasons you use backticks for command substitution as opposed to $() - or is it just habit?

I can type backticks without having to press shift

 

[r00igev@@r]

mtr -rw -c20 -a `ip a show eth1  | awk '/inet /{print $2}' | cut -d/ -f1` 102.132.201.1

Thanks. You a machine!