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# list process by open files
sudo lsof -Fpcn | nawk '
 /^p/ { pid=substr($0,2) }
 /^c/ { cmd=substr($0,2) }
 /^n/ { fd[cmd"["pid"]"]++ }
 END  { for (cc in fd) printf("%-20s %i\n",cc,fd[cc]) } ' | sort -n -k 2