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#!/bin/sh
#to be trusted by other host and no password needed when use ssh command
#check parameters legality
logfile=/var/log/trustme.log
function print_log
{
local promt="$1"
echo -e "$promt"
echo -e "`date -d today +"%Y-%m-%d %H:%M:%S"` $promt" >> $logfile
}
ip=$1
if [ -z $ip ]; then
print_log "Usage: `basename $0` ipaddr passwd"
exit 1
fi
passwd=$2
if [ -z $passwd ]; then
print_log "Usage: `basename $0` ipaddr passwd"
exit 1
fi
rpm -qi sshpass >/dev/null
if [ $? != 0 ]; then
print_log "Please install sshpass first"
exit 1
fi
#ping other host
unreachable=`ping $ip -c 1 -W 3 | grep -c "100% packet loss"`
if [ $unreachable -eq 1 ]; then
print_log "host $ip is unreachable"
exit 1
fi
#generate ssh pubkey
if [ ! -e ~/.ssh/id_dsa.pub ]; then
print_log "generating ssh public key ..."
ssh-keygen -t dsa -f ~/.ssh/id_dsa -N "" <<EOF
n
EOF
if [ $? != 0 ]; then
print_log "ssh-keygen failed"
exit 1
fi
fi
#clear old public key
print_log "clear old info in known_hosts file on localhost ..."
test ! -f ~/.ssh/known_hosts || ssh-keygen -R $ip
if [ $? != 0 ]; then
print_log "clear old info in known_hosts file on localhost failed"
exit 1
fi
#copy new public key
print_log "copy my public key to $ip ..."
sshpass -p $passwd ssh-copy-id -i ~/.ssh/id_dsa.pub -o StrictHostKeyChecking=no root@$ip
if [ $? != 0 ]; then
print_log "ssh-copy-id failed"
exit 1
fi
print_log "trustme ok!"
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