Answer Posted / chetan

First log in on A as user a and generate a pair of authentication keys. Do not enter a passphrase:

a@A:~> ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/home/a/.ssh/id_rsa):
Created directory '/home/a/.ssh'.
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/a/.ssh/id_rsa.
Your public key has been saved in /home/a/.ssh/id_rsa.pub.
The key fingerprint is:
3e:4f:05:79:3a:9f:96:7c:3b:ad:e9:58:37:bc:37:e4 a@A
Now use ssh to create a directory ~/.ssh as user b on B. (The directory may already exist, which is fine):

a@A:~> ssh b@B mkdir -p .ssh
b@B's password:
Finally append a's new public key to b@B:.ssh/authorized_keys and enter b's password one last time:

a@A:~> cat .ssh/id_rsa.pub | ssh b@B 'cat >> .ssh/authorized_keys'
b@B's password:
From now on you can log into B as b from A as a without password:

a@A:~> ssh b@B hostname
B
A note from one of our readers: Depending on your version of SSH you might also have to do the following changes:

Put the public key in .ssh/authorized_keys2
Change the permissions of .ssh to 700
Change the permissions of .ssh/authorized_keys2 to 640

how i can Design a client–server network with two servers operating at 100Base- T Fast Ethernet speed and the clients operating at regular 10Base-T Ethernet speed using a 10/100 Mbps NIC. The hub is located in a wiring closet, but the servers and clients are not. Assume that a satisfactory performance is achieved at 40% utilization of the LAN.

2638

---

please forward Apache server and tomcat server questions and answers

2847

---

can i get oracle10g with Linux installation procedure

1980

---

Define rsa algorithm?

1164

---

Define data encapsulation?

1153

---

Whether the default hello timer value is same across STP,RSTP and MSTP

2752

---

Define ipconfig?

1160

---

What is looping and how switching loops are avoided at L2 level?

2011

---

What can be considered as good passwords?

986

---

Explain how are ip addresses arranged and displayed?

1017

---

How many types of booting process in Solaris

2186

---

what is the diff between LLT,GAB&TCP/IP?

2212

---

Explain 802.1Q header?.

2083

---

Explain netstat?

1064

---

What platforms do you currently work on at your desk?

1968

---