Execute ssh command without password?

Question

I execute the following command:

ssh -l admin hostname command

Each time I execute it, I am asked to enter a password. How can I automatically provide it with a password since I am going to put this in a bash script?

Solution 1

No problem. Make keys without a password: http://linuxproblem.org/art_9.html

Solution 2

If ssh server not support publickey, use expect script

#!/usr/bin/expect -f
set ipaddr [lrange $argv 0 0]
spawn ssh admin@$ipaddr
expect "Password:"
sleep 1
send "PASSWORD\r"
interact

And run

./script hostname

Comments

[Zoredache]

The standard method to accomplish something like this is to use [key-based authentication][serverfault.com/search?q=ssh+key+authenticat‌​ion]. Follow the link to see lots of SF questions on the topic.