contrib/ssh-copy-id

   1 #!/bin/sh
   2
   3 # Shell script to install your public key on a remote machine
   4 # Takes the remote machine name as an argument.
   5 # Obviously, the remote machine must accept password authentication,
   6 # or one of the other keys in your ssh-agent, for this to work.
   7
   8 ID_FILE="${HOME}/.ssh/id_rsa.pub"
   9
  10 if [ "-i" = "$1" ]; then
  11   shift
  12   # check if we have 2 parameters left, if so the first is the new ID file
  13   if [ -n "$2" ]; then
  14     if expr "$1" : ".*\.pub" > /dev/null ; then
  15       ID_FILE="$1"
  16     else
  17       ID_FILE="$1.pub"
  18     fi
  19     shift         # and this should leave $1 as the target name
  20   fi
  21 else
  22   if [ x$SSH_AUTH_SOCK != x ] && ssh-add -L >/dev/null 2>&1; then
  23     GET_ID="$GET_ID ssh-add -L"
  24   fi
  25 fi
  26
  27 if [ -z "`eval $GET_ID`" ] && [ -r "${ID_FILE}" ] ; then
  28   GET_ID="cat ${ID_FILE}"
  29 fi
  30
  31 if [ -z "`eval $GET_ID`" ]; then
  32   echo "$0: ERROR: No identities found" >&2
  33   exit 1
  34 fi
  35
  36 if [ "$#" -lt 1 ] || [ "$1" = "-h" ] || [ "$1" = "--help" ]; then
  37   echo "Usage: $0 [-i [identity_file]] [user@]machine" >&2
  38   exit 1
  39 fi
  40
  41 # strip any trailing colon
  42 host=`echo $1 | sed 's/:$//'`
  43
  44 { eval "$GET_ID" ; } | ssh $host "umask 077; test -d ~/.ssh || mkdir ~/.ssh ; cat >> ~/.ssh/authorized_keys" || exit 1
  45
  46 cat <<EOF
  47 Now try logging into the machine, with "ssh '$host'", and check in:
  48
  49   ~/.ssh/authorized_keys
  50
  51 to make sure we haven't added extra keys that you weren't expecting.
  52
  53 EOF
  54