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#!/bin/bash | |
# Interval of calculation in seconds | |
INTERVAL="1" | |
if [ -z "$1" ]; then | |
echo | |
echo usage: $0 [network-interface] | |
echo | |
echo e.g. $0 eth0 | |
echo | |
echo shows packets-per-second | |
exit | |
fi | |
IF=$1 | |
while true | |
do | |
R1=`cat /sys/class/net/$1/statistics/rx_packets` | |
T1=`cat /sys/class/net/$1/statistics/tx_packets` | |
sleep $INTERVAL | |
R2=`cat /sys/class/net/$1/statistics/rx_packets` | |
T2=`cat /sys/class/net/$1/statistics/tx_packets` | |
TXPPS=`expr $T2 - $T1` | |
RXPPS=`expr $R2 - $R1` | |
echo -e "TX $TXPPS\tpkts/s RX $RXPPS\tpkts/s" | |
done |
Fixed! thanks!
Prettify Bash https://gist.github.com/evgenypim/c5b3c39f73d885d3861f
Hi guys
If I use the script at https://gist.github.com/evgenypim/c5b3c39f73d885d3861f . Which I assumed will be correct because of the latest date
It throws out error
[user@server ~]# ./2pps.sh eth0
./2pps.sh: line 19: cat: No such file or directory
./2pps.sh: line 20: cat: No such file or directory
./2pps.sh: line 22: cat: No such file or directory
./2pps.sh: line 23: cat: No such file or directory
TX eth0: - pkts/s RX eth0: - pkts/s
after some testing I realized that syntax below had error
R1="$(<cat /sys/class/net/$IF/statistics/rx_packets)"
hence had to change it to
R1=$( cat /sys/class/net/eth0/statistics/rx_packets)
Moreover following also worked for me.
T1=cat /sys/class/net/$IF/statistics/tx_packets
Thanks
A small improvement that makes the script work inside network namespaces:
#!/bin/bash
INTERVAL="1" # update interval in seconds
if [ -z "$1" ]; then
echo
echo usage: $0 [network-interface]
echo
echo e.g. $0 eth0
echo
echo shows packets-per-second
exit
fi
IF=$1
SYS_PATH="/sys"
MNT=`mktemp -d`
mount -t sysfs none $MNT 2> /dev/null
if [ $? -eq 0 ]; then
SYS_PATH="$MNT"
trap 'umount $MNT' EXIT
fi
while true
do
R1=`cat $SYS_PATH/class/net/$1/statistics/rx_packets`
T1=`cat $SYS_PATH/class/net/$1/statistics/tx_packets`
sleep $INTERVAL
R2=`cat $SYS_PATH/class/net/$1/statistics/rx_packets`
T2=`cat $SYS_PATH/class/net/$1/statistics/tx_packets`
TXPPS=`expr $T2 - $T1`
RXPPS=`expr $R2 - $R1`
echo "TX $1: $TXPPS pkts/s RX $1: $RXPPS pkts/s"
done
Nice one! Thank you for sharing!
Fixed syntax error in: https://gist.github.com/podlom/bef6073fffed5fb41af4