I have an input:
$ ip -json route show > ip_routes.json$ cat ip_routes.json # I've pretty printed this for easier reading.[ {"dst": "default","gateway": "10.1.201.1","dev": "eth0" }, {"dst": "10.1.201.0/24","dev": "eth0","prefsrc": "10.1.201.74" }, {"dst": "10.1.202.0/24","dev": "eth0","prefsrc": "10.1.202.74" }, {"dst": "10.244.0.0/24","dev": "cni0","prefsrc": "10.244.0.1" }, {"dst": "10.244.0.0/22","dev": "cni0","scope": "link","flags": [] }]I can do a query where dev is eth0 and not the default gateway:
$ jq '. [] | if .dev == "eth0" and .dst != "default" then . else empty end' ip_routes.json{"dst": "10.1.201.0/24","dev": "eth0","prefsrc": "10.1.201.74"}{"dst": "10.1.202.0/24","dev": "eth0","prefsrc": "10.1.202.74"}If I try to select specific properties in the output their association with the object is lost:
jq '. [] | if .dev == "eth0" and .dst != "default" then .dev, .prefsrc else empty end' ip_routes.json"eth0""10.1.201.74""eth0""10.1.202.74"How do get something like this?
[ {"eth0","10.1.201.74" } , {"eth0","10.1.202.74" }]