speed-test.sh

#!/bin/bash
# speed-test.sh
#
# Test ssh connection speed by uploading and then downloading a 10000kB test
# file (optionally user-specified size)
#
# Usage:
#   ./speed-test.sh user@hostname outfile [test file size in kBs]
#

ssh_server=$1
test_file=".scp-test-file"

# Optional: user specified test file size in kBs
if test -z "$3"
then
  # default size is 10000kB ~ 10mB
  test_size="10000"
else
  test_size=$3
fi

out_file=$2

# generate a 10000kB file of all zeros
echo "Generating $test_size kB test file..."
`dd if=/dev/zero of=$test_file bs=$(echo "$test_size*1024" | bc) \
  count=1 &> /dev/null`

# upload test
echo "Testing upload to $ssh_server..."
up_speed=`scp -v $test_file $ssh_server:$test_file 2>&1 | \
  grep "Bytes per second" | \
  sed "s/^[^0-9]*\([0-9.]*\)[^0-9]*\([0-9.]*\).*$/\1/g"`
up_speed=`echo "($up_speed*0.0009765625*100.0+0.5)/1*0.01" | bc`

# download test
echo "Testing download to $ssh_server..."
down_speed=`scp -v $ssh_server:$test_file $test_file 2>&1 | \
  grep "Bytes per second" | \
  sed "s/^[^0-9]*\([0-9.]*\)[^0-9]*\([0-9.]*\).*$/\2/g"`
down_speed=`echo "($down_speed*0.0009765625*100.0+0.5)/1*0.01" | bc`

# clean up
echo "Removing test file on $ssh_server..."
`ssh $ssh_server "rm $test_file"`
echo "Removing test file locally..."
`rm $test_file`


# print result
`rm $out_file`
echo "Upload $up_speed kB/s" >> $out_file
echo "Download $down_speed kB/s" >> $out_file