Sem ter muito o que fazer por hoje :P, escrevi esse Shell Script básico que mostra o status de consumo das interfaces de rede em tempo real no terminal! Não é lá essas coisas, mas o que tá valendo é a intenção... :)

P.S.: melhorias serão bem-vindas.

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Versão 2 - Enviado por Sandro Marcell em 09/10/2013

Changelog: Translate to pt_BR. :)

Download 1381297433.bwd_meter

Esconder código-fonte

#!/bin/bash
#
# Copyright 2013 Sandro Marcell <smarcell@myopera.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
# MA 02110-1301, USA.
#
PATH='/bin:/usr/bin:/usr/local/bin'

trap 'echo -ne "{FONTE}33[?12l{FONTE}33[?25h"; exit 0' SIGINT SIGTERM SIGQUIT

[ $# -eq 0 ] && { echo "Usage: $0 -u K|M|G -i interface"; exit 1; }

unit='xxx'
iface='yyy'

while [ $# -ne 0 ]; do
    case "$1" in
        '-u')
            shift
            unit="$1"
            ;;
        '-i')
            shift
            iface="$1"
            ;;
        *)
            echo "Usage: $0 -u K|M|G -i interface"
            exit 1
    esac
    shift
done

echo "$unit" | grep -q '\(K\|M\|G\)' || { echo "Use only K(ilo), M(ega) or G(iga)"; exit 1; }
if [ ! -d "/sys/class/net/$iface" ]; then
    echo "$iface: interface not found"
    exit 1
fi

function bandwidthCalc {
    if [ "$1" == 'K' ]; then
        echo "scale = 2; $bytes_diff / 128" | bc
    elif [ "$1" == 'M' ]; then
        echo "scale = 2; $bytes_diff * 8 / 1048576" | bc
    elif [ "$1" == 'G' ]; then
        echo "scale = 2; $bytes_diff * 8 / 1073741824" | bc
    fi
}

echo -ne "{FONTE}33[?25l"

while true; do
    exec 3< /sys/class/net/$iface/statistics/rx_bytes; read -u 3 rx_1; exec 3<&-
    sleep 1
    exec 3< /sys/class/net/$iface/statistics/rx_bytes; read -u 3 rx_2; exec 3<&-

    (( bytes_diff = rx_2 - rx_1 ))
    rx_bwd=$(bandwidthCalc $unit)
    echo -ne "$iface: transfer rate - {FONTE}33[1;33m$rx_bwd{FONTE}33[00m ${unit}bit/s{FONTE}33[0K\r"
done

Script para autenticar usuario ip fixo speedy

Mantenha seu relógio ajustado 2.0

Localizar e excluir linhas repetidas em um arquivo texto

Apostila interativa de linux (incompleto)

Network_test