scp_from(){    rfile=${1##*:}    remote=${1%%:*}    lfile=$2    echo "cat $lfile | ssh $remote \"cat >>$rfile\""    cat $lfile | ssh $remote "cat >>$rfile"}scp_to(){    lfile=$1    rfile=${2##*:}    remote=${2%%:*}    echo "cat $lfile | ssh $remote \"cat >>$rfile\""    cat $lfile | ssh $remote "cat >>$rfile"}scp(){    if echo $1|grep -q ‘:‘; then        scp_from "$@"    else        scp_to "$@"    fi}# 举例：scp aa.sh work:/tmp/bb.shscp work:/tmp/bb.sh aa.sh