========================================== tar for ssh transport to other hosts
tar cvf ssh_bin.tar /usr/local/bin/ssh*,scp*,slogin 
tar uvf ssh_bin.tar /usr/local/bin/ssh-keygen*,ssh-agent*
#tar uvf ssh_bin.tar /usr/local/bin/ssh-add1,ssh-add,ssh-askpass*
tar uvf ssh_bin.tar /usr/local/bin/make-ssh*
tar uvf ssh_bin.tar /etc/ssh*
tar uvf ssh_bin.tar /etc/rc2.d/S10sshd,K10sshd /etc/init.d/sshd 
tar uvf ssh_bin.tar /usr/local/sbin/sshd*
tar uvf ssh_bin.tar /usr/local/man/man1/ssh*,slogin*,scp*,make-ssh* /usr/local/man/man8/{sshd.8,sshd1.8}
tar uvf ssh_bin.tar /etc/pam.d/sshd.pam
tar uvf ssh_bin.tar /usr/local/ssh-docs
gzip ssh_bin.tar

Installing on a number of machines: 
========================================== generate key
    extract in root and generate a host key:
ssh-keygen -b 1024 -f /etc/ssh_host_dsa_key -N '' -t dsa; 
ssh-keygen -b 1024 -f /etc/ssh_host_rsa_key -N '' -t rsa;

    Add the ssh service, by adding the following to /etc/services: 
ssh 22/tcp            # Secure Shell 
    Start the ssh daemon: 
/etc/rc2.d/S10sshd start
------------------------------------------
ssh-keygen -b 1024 -f identity -P '' -t dsa
transfer the public key to the server
scp identity.pub kuser@[ip.of.server]:~/identity-[ip.of.client].pub
cat identity-[ip.of.client].pub >> .ssh/authorized_keys

========================================== Running scripts over ssh
ssh-agent
========================================== keep ssh alive
while sleep 300; do echo -en '\000'; done &
========================================== platforms
andrew2.andrew.cmu.edu/dist/niftytelnet.html	MAC
www.lysator.liu.se/~jonasw
www.cl.cam.ac.uk/~fapp2/software/java-ssh
http://www.bastille-linux.org/jay/stupid-protocols.html
========================================== ssh, autologin
Create a ssh key (using ssh-keygen), copy the public part (the *.pub
file) into your /root/.ssh/authorized_keys file on all hosts.. and
there you go.
If this doesnt work, things to check are:
  - file permissions on /root/.ssh and /root/.ssh/authorized_keys
  - "PermitRootLogin" in /etc/ssh/sshd_config is set to
    "without-password" or "yes"
-------------------------------
ssh copy_host "cd /saved/dir; tar cf . | nc -l -p 2222" cd /target; nc copy_host 2222 | tar xvf -
-------------------------------	SMTP tunneling
ssh -2 -N -f -L 13025:zima.linwin.com:25 user1@host.linwin.com 2>/dev/null
as root
ssh -L 110:mailhost:110 -l user -N mailhost
ssh -L 110:mailhost:110 -L 25:mailhost:25 -l user -N mailhost
-------------------------------
If the machine that you installed rsync on is firewalled (I hope so!), just
block incoming access to TCP port 873.  That's the port that the rsync
daemon listens on.  Also, you should be able to configure the rsync daemon
to only listen on the loopback interface.  Of course, port 22 for ssh will
need to be open.

Then, from your backup host, you'll need to log into ssh like this:

ssh -l <username> -L 873:localhost:873 <remote host>

That will set up a tunnel from port 873 on your local machine to port 873 on
the loopback interface of the remote machine.  Then you can use rsync on
your local machine to connect to its local port 873.  ssh will take of the
rest and forward the connection to the remote machine for you.

The command line might look like this:

rsync --delete -ravz user@localhost::BackupDir BackupDir
------------------------------- no rsync server running on target machine
[user@hlocal ~/tmp/rsync]$ ls
[user@hlocal ~/tmp/rsync]$ rsync hremote::
rsync: failed to connect to hremote: Connection refused
rsync error: error in socket IO (code 10) at clientserver.c(83)
[user@hlocal ~/tmp/rsync]$ rsync -av --progress -e ssh user@hremote:/home/user/bin/g* .