Get all the listening ports of a linux device in a nice interface

get_connections.sh

#!/bin/bash

# Print the table header
echo -e '╭─────────────────┬───────────────────────────┬─────────────────────┬──────┬──────┬──────╮'
echo -e '│ Process         │ Local Address             │ Foreign Address     │ Prot │ RcvQ │ SndQ │'
echo -e '├─────────────────┼───────────────────────────┼─────────────────────┼──────┼──────┼──────┤'

# Get the output of ss and process it
sudo ss -lntup | awk '
function truncate(str, max_len) {
  if (length(str) > max_len) {
    return substr(str, 1, max_len-3) "...";
  }
  return str;
}

NR==1 {next} # Skip the header line
{
  # Extract process name
  match($0, /users:\(([^)]+)\)/, a);
  if (a[1]) {
    split(a[1], proc_array, ",");
    proc_name = proc_array[1];
    gsub(/[()]/, "", proc_name);
    split(proc_name, name, "\"");
    process = name[2];
  } else {
    process = "N/A";
  }

  # Get the values and truncate if needed
  process = truncate(process, 15);
  local_addr = truncate($5, 25);
  foreign_addr = truncate($6, 19);
  protocol = truncate($1, 4);
  rcvq = truncate($3, 4);
  sndq = truncate($4, 4);

  printf "│ %-15s │ %-25s │ %-19s │ %-4s │ %-4s │ %-4s │\n",
         process, local_addr, foreign_addr, protocol, rcvq, sndq;
}
' | grep -v 'firefox-esr' | sort -k1,1

# Print the table footer
echo -e '╰─────────────────┴───────────────────────────┴─────────────────────┴──────┴──────┴──────╯'