Find max open files and its limit per process

find ulimit awk printf open-files

Source

• ChatGPT discussion

printf "%-8s %-30s %-15s %s\n" "PID" "Name" "soft/hard" "open files"
for pid in /proc/[0-9]*; do
    p=$(basename "$pid");
    name=$(ps -p "$p" -o comm= 2>/dev/null);
    limit=$(awk '/Max open files/ {print $4 "/" $5}' "$pid/limits" 2>/dev/null);
    [ -n "$limit" ] && printf "%-8s %-30s %-15s %s\n" "$p" "$name" "$limit" "$(ls "$pid/fd" 2>/dev/null | wc -l)";
done