NAME READY STATUS RESTARTS AGE
grepme 1/1 Running 0 20h
grepmetoo 1/1 Running 0 19h
Result:
grepme
grepmetoo
How to grep everything under "NAME" and remove else?
Use
command | cut -d' ' -f1 | tail -n+2
# or if delimiter is tab
command | cut -f1 | tail -n+2
# or
command | awk 'NR>1{print $1}'
# or
command | csvcut -d' ' -c NAME | tail -n+2
# or if delimiter is tab
command | csvcut -t -c NAME | tail -n+2
As you mention grep, you could also use
command | grep -o '^[^[:blank:]]*' | tail -n+2
But I'd prefer one of the above as it is way more difficult to read.
The cut solution has the best performance, csvcut by far the worst.
Consider outputting only the desired data to begin with:
kubectl get pods --no-headers=true -o custom-columns=":metadata.name"
or
kubectl get pods --no-headers=true -o name
(Pulled from this Stack Overflow thread and the kubectl overview)
