feat: portar panel Sistema del widget previo + servicio de captura

Pestaña Sistema:
- Reproduce las 9 gráficas del widget anterior dibujadas con Cairo
  sobre históricos en memoria: CPU, RAM, CPU temp, GPU, GPU temp,
  VRAM, red (down/up superpuestos) y disk I/O, más las barras de uso
  de los discos /, /mnt/1tb, /mnt/2tb y /mnt/16tb.
- metric.sh portado (nvidia-smi + coretemp hwmon) para temperaturas
  y métricas de GPU.
- Paleta Nord, igual que el panel original.

Widget redimensionado a 290x545 para acomodar el panel Sistema.

Servicio de captura (service/):
- packet-capture.service: dumpcap en ring buffer (~10 min, 10 archivos
  de hasta 60s/50MB, tope ~500MB) escribiendo en /var/log/pktcap.
- install-capture.sh: crea el directorio, instala y activa el unit.

El botón Wireshark abre ahora el .pcapng más reciente del buffer.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

conky.conf

@@ -14,9 +14,9 @@ conky.config = {
     xinerama_head = 1,            -- 1 = DP-1 (pantalla izquierda). 0 = HDMI-0 derecha.
     gap_x = 30,                   -- separacion desde el borde derecho
     gap_y = 50,                   -- separa del panel superior de XFCE
-    minimum_width = 300,
-    maximum_width = 300,
-    minimum_height = 360,
+    minimum_width = 290,
+    maximum_width = 290,
+    minimum_height = 545,
 
     -- Ventana (tipo 'normal' = recibe clicks; 'desktop' los ignora) ----------
     own_window = true,

lua/widget.lua

@@ -3,40 +3,48 @@ conky_widget — render Cairo + pestañas clickeables.
 
 Estructura:
   - Estado: current_tab (1=Red, 2=Sistema, 3=Docker).
-  - conky_draw (lua_draw_hook_post): dibuja la barra de pestañas y el panel activo.
+  - conky_draw (lua_draw_hook_post): mantiene los historicos y dibuja la barra
+    de pestañas y el panel activo.
   - conky_mouse (lua_mouse_hook): cambia de pestaña y lanza apps al clicar botones.
 
 Los datos del sistema se obtienen llamando a conky_parse("${...}") desde Lua,
 de modo que se pueden colocar con libertad mediante Cairo.
 
-Geometria fija (la ventana mide 300x360 segun conky.conf):
-  - Barra de pestañas: y 4..28, tres pestañas de ancho W/3.
-  - Botones de la pestaña Red: fila inferior en BTN_Y.
+La pestaña Sistema reproduce el panel del widget previo: nueve graficas de
+linea (CPU, RAM, CPU temp, GPU, GPU temp, VRAM, red, disk I/O) mas las barras
+de uso de los cuatro discos. Los valores de temperatura/GPU se obtienen de
+metric.sh (nvidia-smi + coretemp hwmon).
+
+Geometria fija (la ventana mide W x H segun conky.conf).
 ]]
 
 require 'cairo'
 pcall(require, 'cairo_xlib')   -- conky >= 1.12 separa el modulo cairo_xlib
 
 -- Geometria compartida entre dibujo y eventos de raton -----------------------
-local W       = 300
-local H       = 360
+local W       = 290
+local H       = 545
 local TAB_TOP = 4
 local TAB_H   = 24
-local BTN_H   = 28
-local BTN_Y   = H - 40          -- 320
+local BTN_H   = 26
+local BTN_Y   = 242             -- fila de botones de la pestaña Red
 
--- Interfaz de red a monitorizar (detectada: enp5s0 es la fisica activa) ------
+-- Interfaz de red a monitorizar (enp5s0 es la fisica activa) ------------------
 local NIF = "enp5s0"
 
+-- Helper de metricas (temps + GPU), portado del widget previo -----------------
+local MET = os.getenv("HOME") .. "/.config/conky/conky_widget/metric.sh"
+
 -- Pestañas -------------------------------------------------------------------
 local TABS = { "Red", "Sistema", "Docker" }
 local current_tab = 1
 
--- Botones de la pestaña Red. cmd es un comando shell; bin se comprueba antes
--- de lanzar y, si falta, launch.sh avisa con notify-send.
+-- Botones de la pestaña Red. bin se comprueba antes de lanzar; si falta,
+-- launch.sh avisa con notify-send.
 local BTNS = {
     { label = "Wireshark", bin = "wireshark", pkg = "wireshark",
-      cmd = "wireshark /var/log/pktcap/cap.pcapng 2>/dev/null || wireshark" },
+      cmd = "f=$(ls -t /var/log/pktcap/*.pcapng 2>/dev/null | head -1); " ..
+            "if [ -n \"$f\" ]; then wireshark -r \"$f\"; else wireshark; fi" },
     { label = "ntopng",    bin = "ntopng",    pkg = "ntopng",
       cmd = "xdg-open http://localhost:3000" },
     { label = "nethogs",   bin = "nethogs",   pkg = "nethogs",
@@ -45,30 +53,49 @@ local BTNS = {
 
 local LAUNCH = os.getenv("HOME") .. "/.config/conky/conky_widget/lua/launch.sh"
 
--- Historico de velocidad de red para el grafico en vivo ----------------------
-local HIST = 60
-local down_hist, up_hist = {}, {}
-for i = 1, HIST do down_hist[i] = 0; up_hist[i] = 0 end
+-- Historicos para los graficos en vivo ---------------------------------------
+local GH = 58
+local KEYS = { "cpu", "ram", "cputemp", "gputil", "gputemp", "vram", "diskio", "down", "up" }
+local hist = {}
+for _, k in ipairs(KEYS) do
+    hist[k] = {}
+    for i = 1, GH do hist[k][i] = 0 end
+end
 
 local function push(t, v)
     table.remove(t, 1)
     t[#t + 1] = v
 end
 
--- Paleta ---------------------------------------------------------------------
+-- Paleta (Nord, como el widget previo) ---------------------------------------
+local function hex(s)
+    return {
+        tonumber(s:sub(1, 2), 16) / 255,
+        tonumber(s:sub(3, 4), 16) / 255,
+        tonumber(s:sub(5, 6), 16) / 255,
+    }
+end
+
 local COL = {
-    bg           = { 0.08, 0.09, 0.11 },
-    panel        = { 0.14, 0.15, 0.18 },
-    tab_active   = { 0.18, 0.55, 0.85 },
-    tab_inactive = { 0.18, 0.19, 0.23 },
-    text         = { 0.86, 0.87, 0.90 },
-    white        = { 1.00, 1.00, 1.00 },
-    dim          = { 0.55, 0.57, 0.62 },
-    green        = { 0.30, 0.80, 0.45 },
-    orange       = { 0.95, 0.60, 0.20 },
-    red          = { 0.90, 0.30, 0.35 },
-    down         = { 0.30, 0.70, 0.95 },
-    up           = { 0.95, 0.55, 0.30 },
+    bg           = hex("0e0f12"),
+    panel        = hex("1b1d23"),
+    tab_active   = hex("5e81ac"),
+    tab_inactive = hex("2e3440"),
+    text         = hex("d8dee9"),
+    snow         = hex("eceff4"),
+    white        = { 1, 1, 1 },
+    dim          = hex("7b8394"),
+    teal         = hex("8fbcbb"),
+    green        = hex("a3be8c"),
+    cyan         = hex("88c0d0"),
+    blue         = hex("81a1c1"),
+    frost        = hex("5e81ac"),
+    yellow       = hex("ebcb8b"),
+    orange       = hex("d08770"),
+    purple       = hex("b48ead"),
+    red          = hex("bf616a"),
+    down         = hex("88c0d0"),
+    up           = hex("d08770"),
 }
 
 -- Helpers de lectura de datos ------------------------------------------------
@@ -82,6 +109,17 @@ local function num(expr)
     return tonumber(str(expr)) or 0
 end
 
+-- Convierte un texto de tasa de conky ("1.2MiB", "300KiB", "5B") a KiB/s ------
+local function rate_kib(s)
+    local n, unit = s:match("([%d%.]+)%s*([KMGTPi]*)B?")
+    n = tonumber(n) or 0
+    unit = unit or ""
+    if unit:find("M") then return n * 1024
+    elseif unit:find("G") then return n * 1024 * 1024
+    elseif unit:find("K") then return n
+    else return n / 1024 end
+end
+
 -- Helpers de dibujo ----------------------------------------------------------
 local function setcol(cr, c, a)
     cairo_set_source_rgba(cr, c[1], c[2], c[3], a or 1.0)
@@ -105,10 +143,9 @@ local function text(cr, x, y, s, c, size, bold)
     cairo_show_text(cr, s)
 end
 
--- Centrado aproximado para fuente monoespaciada (avance ~0.6*tamaño) ----------
-local function ctext(cr, cx, y, s, c, size, bold)
-    local tw = #s * (size or 12) * 0.6
-    text(cr, cx - tw / 2, y, s, c, size, bold)
+-- Texto alineado a la derecha (avance mono ~0.6*tamaño) ----------------------
+local function rtext(cr, xr, y, s, c, size, bold)
+    text(cr, xr - #s * (size or 12) * 0.6, y, s, c, size, bold)
 end
 
 local function bar(cr, x, y, w, h, frac, c)
@@ -117,6 +154,30 @@ local function bar(cr, x, y, w, h, frac, c)
     setcol(cr, c);                rrect(cr, x, y, math.max(2, w * frac), h, 3); cairo_fill(cr)
 end
 
+-- Grafico de linea sobre un panel redondeado ---------------------------------
+local function graph(cr, x, y, w, h, series)
+    setcol(cr, COL.panel); rrect(cr, x, y, w, h, 4); cairo_fill(cr)
+    -- Maximo comun a todas las series (fijo si se indica)
+    local maxv = 1
+    for _, s in ipairs(series) do
+        if s.max then
+            if s.max > maxv then maxv = s.max end
+        else
+            for i = 1, #s.data do if s.data[i] > maxv then maxv = s.data[i] end end
+        end
+    end
+    for _, s in ipairs(series) do
+        cairo_set_line_width(cr, 1.3); setcol(cr, s.c)
+        local n = #s.data
+        for i = 1, n do
+            local px = x + (i - 1) / (n - 1) * w
+            local py = y + h - (s.data[i] / maxv) * (h - 4) - 2
+            if i == 1 then cairo_move_to(cr, px, py) else cairo_line_to(cr, px, py) end
+        end
+        cairo_stroke(cr)
+    end
+end
+
 -- Barra de pestañas ----------------------------------------------------------
 local function draw_tabs(cr)
     local tw = W / 3
@@ -125,33 +186,12 @@ local function draw_tabs(cr)
         local active = (i == current_tab)
         setcol(cr, active and COL.tab_active or COL.tab_inactive)
         rrect(cr, x + 3, TAB_TOP, tw - 6, TAB_H, 5); cairo_fill(cr)
-        ctext(cr, x + tw / 2, TAB_TOP + 17, TABS[i],
+        local lbl = TABS[i]
+        text(cr, x + tw / 2 - #lbl * 12 * 0.6 / 2, TAB_TOP + 17, lbl,
             active and COL.white or COL.dim, 12, active)
     end
 end
 
--- Grafico de red en vivo -----------------------------------------------------
-local function draw_netgraph(cr, x, y, w, h)
-    setcol(cr, COL.panel); rrect(cr, x, y, w, h, 6); cairo_fill(cr)
-    local maxv = 1
-    for i = 1, HIST do
-        if down_hist[i] > maxv then maxv = down_hist[i] end
-        if up_hist[i]   > maxv then maxv = up_hist[i]   end
-    end
-    local function plot(hist, c)
-        cairo_set_line_width(cr, 1.5); setcol(cr, c)
-        for i = 1, HIST do
-            local px = x + (i - 1) / (HIST - 1) * w
-            local py = y + h - (hist[i] / maxv) * (h - 6) - 3
-            if i == 1 then cairo_move_to(cr, px, py) else cairo_line_to(cr, px, py) end
-        end
-        cairo_stroke(cr)
-    end
-    plot(down_hist, COL.down)
-    plot(up_hist, COL.up)
-    text(cr, x + 5, y + 12, string.format("max %.0f KiB/s", maxv), COL.dim, 8)
-end
-
 -- Botones de la pestaña Red --------------------------------------------------
 local function draw_buttons(cr)
     local bw = (W - 24) / 3
@@ -160,77 +200,98 @@ local function draw_buttons(cr)
         setcol(cr, COL.tab_inactive); rrect(cr, bx, BTN_Y, bw, BTN_H, 6); cairo_fill(cr)
         setcol(cr, COL.tab_active, 0.9); cairo_set_line_width(cr, 1)
         rrect(cr, bx, BTN_Y, bw, BTN_H, 6); cairo_stroke(cr)
-        ctext(cr, bx + bw / 2, BTN_Y + 18, BTNS[i].label, COL.text, 10)
+        local lbl = BTNS[i].label
+        text(cr, bx + bw / 2 - #lbl * 10 * 0.6 / 2, BTN_Y + 17, lbl, COL.text, 10)
     end
 end
 
 -- Panel: Red -----------------------------------------------------------------
 local function draw_red(cr)
     local y = 50
-    text(cr, 14, y, "Interfaz " .. NIF, COL.dim, 11); y = y + 22
+    text(cr, 12, y, "Interfaz " .. NIF, COL.dim, 11); y = y + 22
 
-    text(cr, 14, y, "Down", COL.down, 12)
+    text(cr, 12, y, "Down", COL.down, 12)
     text(cr, 90, y, str("${downspeed " .. NIF .. "}"), COL.text, 13, true); y = y + 20
-    text(cr, 14, y, "Up", COL.up, 12)
+    text(cr, 12, y, "Up", COL.up, 12)
     text(cr, 90, y, str("${upspeed " .. NIF .. "}"), COL.text, 13, true); y = y + 24
 
-    draw_netgraph(cr, 14, y, W - 28, 78); y = y + 90
+    graph(cr, 12, y, W - 24, 70, {
+        { data = hist.down, c = COL.down },
+        { data = hist.up,   c = COL.up },
+    })
+    y = y + 78
 
     local conns = str("${execi 2 ss -tun state established 2>/dev/null | tail -n +2 | wc -l}")
-    text(cr, 14, y, "Conexiones activas: " .. conns, COL.text, 11); y = y + 18
-    text(cr, 14, y, "Total  ↓ " .. str("${totaldown " .. NIF .. "}") ..
+    text(cr, 12, y, "Conexiones activas: " .. conns, COL.text, 11); y = y + 16
+    text(cr, 12, y, "Total  ↓ " .. str("${totaldown " .. NIF .. "}") ..
                     "   ↑ " .. str("${totalup " .. NIF .. "}"), COL.dim, 10)
 
     draw_buttons(cr)
+
+    text(cr, 12, BTN_Y + BTN_H + 18,
+        "Wireshark abre el buffer de captura mas reciente.", COL.dim, 9)
 end
 
--- Panel: Sistema -------------------------------------------------------------
+-- Panel: Sistema (portado del widget previo) ---------------------------------
 local function draw_sys(cr)
-    local y = 50
+    local x  = 10
+    local gw = W - 20
+    local y  = 38
 
-    local cpu = num("${cpu cpu0}")
-    text(cr, 14, y, "CPU", COL.text, 12, true)
-    text(cr, W - 52, y, string.format("%d%%", cpu), COL.text, 12)
-    y = y + 6
-    bar(cr, 14, y, W - 28, 8, cpu / 100, cpu > 80 and COL.red or COL.green)
-    y = y + 18
-
-    local nproc = math.floor(num("${exec nproc}"))
-    if nproc < 1 then nproc = 1 elseif nproc > 16 then nproc = 16 end
-    local cw = (W - 28) / nproc
-    for i = 1, nproc do
-        local cu = num("${cpu cpu" .. i .. "}")
-        bar(cr, 14 + (i - 1) * cw, y, cw - 2, 6, cu / 100,
-            cu > 80 and COL.red or COL.green)
+    local function row(label, value, lc, gh)
+        text(cr, x, y + 11, label, lc, 11, true)
+        if value and value ~= "" then rtext(cr, W - 10, y + 11, value, COL.snow, 10) end
+        y = y + 15
+        return gh
     end
-    y = y + 20
 
-    local memp = num("${memperc}")
-    text(cr, 14, y, "RAM", COL.text, 12, true)
-    text(cr, W - 150, y, str("${mem}") .. " / " .. str("${memmax}"), COL.dim, 9)
-    y = y + 6
-    bar(cr, 14, y, W - 28, 8, memp / 100, memp > 85 and COL.red or COL.orange)
-    y = y + 18
+    local cputemp = str("${execi 3 " .. MET .. " cpu_temp}")
+    local gputemp = str("${execi 2 " .. MET .. " gpu_temp}")
 
-    local swapp = num("${swapperc}")
-    text(cr, 14, y, "Swap", COL.text, 12, true)
-    text(cr, W - 150, y, str("${swap}") .. " / " .. str("${swapmax}"), COL.dim, 9)
-    y = y + 6
-    bar(cr, 14, y, W - 28, 8, swapp / 100, COL.orange)
-    y = y + 18
+    -- CPU
+    local gh = row("CPU " .. math.floor(num("${cpu cpu0}")) .. "%",
+                   str("${freq_g}") .. "GHz  " .. cputemp .. "°C", COL.teal, 26)
+    graph(cr, x, y, gw, gh, { { data = hist.cpu, c = COL.green, max = 100 } }); y = y + gh + 4
 
-    local diskp = num("${fs_used_perc /}")
-    text(cr, 14, y, "Disco /", COL.text, 12, true)
-    text(cr, W - 150, y, str("${fs_used /}") .. " / " .. str("${fs_size /}"), COL.dim, 9)
-    y = y + 6
-    bar(cr, 14, y, W - 28, 8, diskp / 100, diskp > 90 and COL.red or COL.green)
-    y = y + 24
+    -- RAM
+    gh = row("RAM " .. math.floor(num("${memperc}")) .. "%",
+             str("${mem}") .. " / " .. str("${memmax}"), COL.green, 26)
+    graph(cr, x, y, gw, gh, { { data = hist.ram, c = COL.green, max = 100 } }); y = y + gh + 4
 
-    local traw = tonumber(str("${execi 5 cat /sys/class/thermal/thermal_zone0/temp 2>/dev/null}"))
-    local tstr = traw and string.format("%.0f°C", traw / 1000) or "n/a"
-    text(cr, 14, y, "Temp " .. tstr, COL.dim, 10)
-    text(cr, W - 150, y, "Load " .. str("${loadavg 1}"), COL.dim, 10); y = y + 16
-    text(cr, 14, y, "Uptime " .. str("${uptime_short}"), COL.dim, 10)
+    -- CPU TEMP
+    gh = row("CPU TEMP " .. cputemp .. "°C", "", COL.yellow, 20)
+    graph(cr, x, y, gw, gh, { { data = hist.cputemp, c = COL.yellow, max = 100 } }); y = y + gh + 4
+
+    -- GPU
+    gh = row("GPU " .. str("${execi 2 " .. MET .. " gpu_util}") .. "%",
+             gputemp .. "°C", COL.cyan, 26)
+    graph(cr, x, y, gw, gh, { { data = hist.gputil, c = COL.cyan, max = 100 } }); y = y + gh + 4
+
+    -- GPU TEMP
+    gh = row("GPU TEMP " .. gputemp .. "°C", "", COL.yellow, 20)
+    graph(cr, x, y, gw, gh, { { data = hist.gputemp, c = COL.yellow, max = 100 } }); y = y + gh + 4
+
+    -- VRAM
+    gh = row("VRAM " .. str("${execi 2 " .. MET .. " gpu_memp}") .. "%",
+             str("${execi 2 " .. MET .. " gpu_memi}"), COL.purple, 26)
+    graph(cr, x, y, gw, gh, { { data = hist.vram, c = COL.purple, max = 100 } }); y = y + gh + 4
+
+    -- DISK I/O
+    gh = row("DISK I/O", str("${diskio}"), COL.orange, 26)
+    graph(cr, x, y, gw, gh, { { data = hist.diskio, c = COL.purple } }); y = y + gh + 6
+
+    -- Uso de discos
+    text(cr, x, y + 10, "USO DE DISCOS", COL.snow, 10, true); y = y + 16
+    local disks = { "/", "/mnt/1tb", "/mnt/2tb", "/mnt/16tb" }
+    for _, m in ipairs(disks) do
+        local p = num("${fs_used_perc " .. m .. "}")
+        text(cr, x, y + 9, m, COL.green, 10)
+        rtext(cr, W - 10, y + 9,
+            str("${fs_used " .. m .. "}") .. "/" .. str("${fs_size " .. m .. "}") ..
+            "  " .. math.floor(p) .. "%", COL.dim, 9)
+        y = y + 12
+        bar(cr, x, y, gw, 6, p / 100, p > 90 and COL.red or COL.green); y = y + 11
+    end
 end
 
 -- Panel: Docker --------------------------------------------------------------
@@ -238,19 +299,19 @@ local function draw_docker(cr)
     local y = 50
     local running = str("${execi 3 docker ps -q 2>/dev/null | wc -l}")
     local total   = str("${execi 10 docker ps -aq 2>/dev/null | wc -l}")
-    text(cr, 14, y, "Contenedores", COL.text, 12, true)
-    text(cr, W - 110, y, running .. " up / " .. total .. " total", COL.dim, 10)
+    text(cr, 12, y, "Contenedores", COL.text, 12, true)
+    rtext(cr, W - 10, y, running .. " up / " .. total .. " total", COL.dim, 10)
     y = y + 22
 
-    local names = str("${execi 3 docker ps --format '{{.Names}}' 2>/dev/null | head -16}")
+    local names = str("${execi 3 docker ps --format '{{.Names}}' 2>/dev/null | head -28}")
     if names == "" then
-        text(cr, 18, y, "ninguno en marcha", COL.dim, 10)
+        text(cr, 16, y, "ninguno en marcha", COL.dim, 10)
         return
     end
     for line in names:gmatch("[^\n]+") do
-        text(cr, 18, y, "● " .. line, COL.green, 10)
+        text(cr, 16, y, "● " .. line, COL.green, 10)
         y = y + 15
-        if y > H - 16 then break end
+        if y > H - 14 then break end
     end
 end
 
@@ -262,9 +323,16 @@ function conky_draw()
         conky_window.width, conky_window.height)
     local cr = cairo_create(cs)
 
-    -- Mantener el historico de red vivo en todas las pestañas.
-    push(down_hist, num("${downspeedf " .. NIF .. "}"))
-    push(up_hist,   num("${upspeedf " .. NIF .. "}"))
+    -- Mantener todos los historicos vivos en cualquier pestaña.
+    push(hist.cpu,     num("${cpu cpu0}"))
+    push(hist.ram,     num("${memperc}"))
+    push(hist.cputemp, num("${execi 3 " .. MET .. " cpu_temp}"))
+    push(hist.gputil,  num("${execi 2 " .. MET .. " gpu_util}"))
+    push(hist.gputemp, num("${execi 2 " .. MET .. " gpu_temp}"))
+    push(hist.vram,    num("${execi 2 " .. MET .. " gpu_memp}"))
+    push(hist.diskio,  rate_kib(str("${diskio}")))
+    push(hist.down,    num("${downspeedf " .. NIF .. "}"))
+    push(hist.up,      num("${upspeedf " .. NIF .. "}"))
 
     setcol(cr, COL.bg, 0.86); rrect(cr, 0, 0, W, H, 10); cairo_fill(cr)
 
@@ -287,9 +355,8 @@ local function shell_quote(s)
 end
 
 local function launch(b)
-    local cmd = string.format("%s %s %s %s &",
-        shell_quote(LAUNCH), shell_quote(b.bin), shell_quote(b.pkg), shell_quote(b.cmd))
-    os.execute(cmd)
+    os.execute(string.format("%s %s %s %s &",
+        shell_quote(LAUNCH), shell_quote(b.bin), shell_quote(b.pkg), shell_quote(b.cmd)))
 end
 
 -- Hook de raton: cambia de pestaña y lanza apps ------------------------------

metric.sh

@@ -0,0 +1,16 @@
+#!/bin/sh
+# Helper de metricas para conky_widget — imprime UN valor "pelado" (sin etiquetas).
+# Portado del widget previo. Toda la logica con comillas/awk vive aqui para no
+# romper el parser de conky ni el de widget.lua.
+case "$1" in
+  gpu_util) nvidia-smi --query-gpu=utilization.gpu  --format=csv,noheader,nounits ;;
+  gpu_temp) nvidia-smi --query-gpu=temperature.gpu  --format=csv,noheader,nounits ;;
+  gpu_memp) nvidia-smi --query-gpu=memory.used,memory.total --format=csv,noheader,nounits \
+              | awk -F', ' '{printf "%d", $1/$2*100}' ;;
+  gpu_memi) nvidia-smi --query-gpu=memory.used,memory.total --format=csv,noheader,nounits \
+              | awk -F', ' '{printf "%d/%d MB", $1, $2}' ;;
+  cpu_temp) for h in /sys/class/hwmon/hwmon*; do
+              [ "$(cat "$h/name" 2>/dev/null)" = coretemp ] && { cat "$h/temp1_input"; break; }
+            done | awk '{printf "%d", $1/1000}' ;;
+  *) echo 0 ;;
+esac

service/install-capture.sh

@@ -0,0 +1,48 @@
+#!/usr/bin/env bash
+# Instala el servicio systemd packet-capture (dumpcap ring buffer ~10 min).
+# Crea el directorio de captura propiedad del usuario, copia el unit, lo activa
+# y muestra su estado. Requiere privilegios sudo (los pedirá si no están en caché).
+#
+# Uso: install-capture.sh [interfaz]    (por defecto enp5s0)
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+UNIT_SRC="$SCRIPT_DIR/packet-capture.service"
+UNIT_DST="/etc/systemd/system/packet-capture.service"
+CAP_DIR="/var/log/pktcap"
+USER_NAME="${SUDO_USER:-$USER}"
+IFACE="${1:-enp5s0}"
+
+echo "==> packet-capture install (interfaz: $IFACE, usuario: $USER_NAME)"
+
+if ! command -v dumpcap >/dev/null 2>&1; then
+    echo "ERROR: dumpcap no instalado. Instalar: sudo apt install wireshark" >&2
+    exit 1
+fi
+
+# 1. Directorio de captura, propiedad del usuario que ejecuta dumpcap
+sudo mkdir -p "$CAP_DIR"
+sudo chown "$USER_NAME:$USER_NAME" "$CAP_DIR"
+sudo chmod 750 "$CAP_DIR"
+echo "    dir: $CAP_DIR (owner $USER_NAME)"
+
+# 2. Instalar el unit, ajustando interfaz y usuario
+sudo cp "$UNIT_SRC" "$UNIT_DST"
+sudo sed -i \
+    -e "s|-i enp5s0|-i $IFACE|" \
+    -e "s|^User=.*|User=$USER_NAME|" \
+    -e "s|^Group=.*|Group=$USER_NAME|" \
+    "$UNIT_DST"
+echo "    unit: $UNIT_DST"
+
+# 3. Activar y arrancar
+sudo systemctl daemon-reload
+sudo systemctl enable --now packet-capture.service
+sleep 2
+
+echo "==> Estado:"
+sudo systemctl --no-pager --full status packet-capture.service | head -12 || true
+echo "==> Capturas en $CAP_DIR:"
+ls -lh "$CAP_DIR" 2>/dev/null | tail -3 || true
+echo "==> Parar:    sudo systemctl stop packet-capture.service"
+echo "==> Logs:     journalctl -u packet-capture.service -f"

service/packet-capture.service

@@ -0,0 +1,26 @@
+[Unit]
+Description=Packet capture ring buffer (~10 min, dumpcap) for conky_widget
+Documentation=https://gitea-dgg044oo04woo4ggcsws4gk0.organic-machine.com/dataforge/conky_widget
+After=network-online.target
+Wants=network-online.target
+
+[Service]
+# dumpcap escribe un ring buffer rotativo: 10 archivos de hasta 60s o 50MB cada
+# uno, lo que ocurra antes. Resultado: siempre los ultimos ~10 minutos de
+# trafico en disco (tope ~500MB para no llenar el disco con descargas grandes).
+#
+# Variantes utiles (editar la linea ExecStart):
+#   - Solo cabeceras (mucho mas ligero):   añadir  -s 96
+#   - Ver dominios (SNI/DNS) sin payload:   añadir  -s 320
+#   - Filtrar una IP/puerto:                añadir  -f "host 1.2.3.4"
+Type=exec
+User=enmanuel
+Group=enmanuel
+SupplementaryGroups=wireshark
+ExecStart=/usr/bin/dumpcap -i enp5s0 -b duration:60 -b files:10 -b filesize:51200 -w /var/log/pktcap/cap.pcapng
+Restart=always
+RestartSec=3
+Nice=10
+
+[Install]
+WantedBy=multi-user.target