Knowledge Base

pstree -alp | awk -v 'find=yum' 'BEGIN{n=99} {o=split($0,b,"|");if(o>=n){print;}else{n=99;}} $0 ~ find {n=split($0,a,"|");print}'

This isn't perfect, but it's useful. Share your modifications to it!

References

1. https://stackoverflow.com/questions/9351902/how-can-i-get-the-length-of-an-array-in-awk/9351954#9351954
2. My own original research