tail multiple server log

gistfile1.sh

#!/bin/bash
# ref http://mbkzmks.blogspot.jp/2011/02/tail.html

# log file path
FILE=$1
# server addresses
SERVERS=( server1 server2 server3 )
# ssh processes
SSH_PROCESSES=( )

# check number of arguments.
if [ $# -ne 1 ]; then
    echo 'specify path of log file.'
    exit 1
fi

# trap kill signal
trap 'final; exit 0' 1 2 3 15

# kill ssh processes
function final {
    for pid in ${SSH_PROCESSES[@]}; do
        # send kill signal
        kill ${pid}
    done
}

# start ssh processes
for server in ${SERVERS[@]}; do
    ssh $server tail -f $FILE &
    SSH_PROCESSES=( ${SSH_PROCESSES[@]} $! )
done

wait