Useful lsof commands

1. View the top 10 processes with the most open files on your system.

   lsof -n | awk '{print $1}' | sort | uniq -c | sort -nr | head -10

2. List all open TCP and UDP ports and their associated processes

   lsof -i | grep -E "(LISTEN|UDP)" | awk '{print $1, $9}' | sort | uniq

3. List all listening ports and their associated process names

   lsof -i -P -n | grep LISTEN | awk '{print $9, $1}' | sort | uniq

4. Find all open files larger than a specific size, such as 100MB, and sort by size

   lsof -s | awk '$7 > 100*1024*1024 {print $7, $1, $2, $9}' | sort -nr

5. Count the number of open files per process, sorted by process name

   lsof -n | cut -f1 -d' ' | sort | uniq -c | sort -k2,2

lsof Man Page