Linux命令ssh-copy-id （r10笔记第21天）

#!/bin/sh

    # Shell script to install your public key on a remote machine

    # Takes the remote machine name as an argument.

    # Obviously, the remote machine must accept password authentication,

    # or one of the other keys in your ssh-agent, for this to work


    ID_FILE="${HOME}/.ssh/id_rsa.pub"



    if [ "-i" = "$1" ]; then

      shift

      # check if we have 2 parameters left, if so the first is the new ID file

      if [ -n "$2" ]; then

        if expr "$1" : ".*.pub" > /dev/null ; then

          ID_FILE="$1"

        else

          ID_FILE="$1.pub"

        fi

        shift # and this should leave $1 as the target name

      fi

    else

      if [ x$SSH_AUTH_SOCK != x ] ; then

        GET_ID="$GET_ID ssh-add -L"

      fi

    fi



    if [ -z "`eval $GET_ID`" ] && [ -r "${ID_FILE}" ] ; then

      GET_ID="cat ${ID_FILE}"

    fi



    if [ -z "`eval $GET_ID`" ]; then

      echo "$0: ERROR: No identities found" >&2

      exit 1

    fi



    if [ "$#" -lt 1 ] || [ "$1" = "-h" ] || [ "$1" = "--help" ]; then

      echo "Usage: $0 [-i [identity_file]] [user@]machine" >&2

      exit 1

    fi



 { eval "$GET_ID" ; } | ssh $1 "umask  077; test -d ~/.ssh || mkdir ~/.ssh ; cat >>  ~/.ssh/authorized_keys && (test -x /sbin/restorecon &&  /sbin/restorecon ~/.ssh ~/.ssh/authorized_keys >/dev/null 2>&1  || true)" || exit 1



    cat <<EOF

    Now try logging into the machine, with "ssh '$1'", and check in:



 .ssh/authorized_keys



    to make sure we haven't added extra keys that you weren't expecting.



    EOF