In this demo, we will establish ssh connectivity between 2 servers called
riyadh1
riyadh2
On riyadh1 :
[root@riyadh1 ~]# su - oracle [oracle@riyadh1 ~]$ id uid=54321(oracle) gid=54321(oinstall) groups=54321(oinstall),54322(dba),54323(vboxsf) [oracle@riyadh1 ~]$ chmod 700 ~/.ssh [oracle@riyadh1 ~]$ /usr/bin/ssh-keygen -t rsa Generating public/private rsa key pair. Enter file in which to save the key (/home/oracle/.ssh/id_rsa): Enter passphrase (empty for no passphrase): Enter same passphrase again: Your identification has been saved in /home/oracle/.ssh/id_rsa. Your public key has been saved in /home/oracle/.ssh/id_rsa.pub. The key fingerprint is: 6b:54:21:58:c2:7b:9a:9f:e2:ac:b9:98:bf:15:66:02 oracle@riyadh1.localdomain The key's randomart image is: +--[ RSA 2048]----+ | ..oo . | | o. . . | | E . . | | . . .. | | . ++S | | +oo . | | ..o. | | o +..o | | o.*=o. | +-----------------+ [oracle@riyadh1 ~]$
when it will ask for inputs , just press enter. don’t give anything.
Lets do the same operation on other server.
On Riyadh2:
[oracle@riyadh2 ~]$ chmod 700 ~/.ssh [oracle@riyadh2 ~]$ /usr/bin/ssh-keygen -t rsa Generating public/private rsa key pair. Enter file in which to save the key (/home/oracle/.ssh/id_rsa): Enter passphrase (empty for no passphrase): Enter same passphrase again: Your identification has been saved in /home/oracle/.ssh/id_rsa. Your public key has been saved in /home/oracle/.ssh/id_rsa.pub. The key fingerprint is: 6b:5b:ff:22:b7:0f:34:91:22:37:5c:8b:84:71:33:5e oracle@riyadh2.localdomain The key's randomart image is: +--[ RSA 2048]----+ | .o= E | | .= * o | | . B + | | o o . | | S o | | . . . | | o . . | | . o..o. | | . oo=o | +-----------------+
Again on riyadh1:
[oracle@riyadh1 ~]$ cd ~/.ssh [oracle@riyadh1 .ssh]$ cat id_rsa.pub >> authorized_keys [oracle@riyadh1 .ssh]$ scp authorized_keys riyadh2:/home/oracle/.ssh The authenticity of host 'riyadh2 (192.168.100.26)' can't be established. RSA key fingerprint is 6b:e4:a5:ef:a6:89:62:76:25:43:13:aa:49:ed:30:20. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added 'riyadh2,192.168.100.26' (RSA) to the list of known hosts. oracle@riyadh2's password: authorized_keys 100% 408 0.4KB/s 00:00
On riyadh2:
[oracle@riyadh2 ~]$ cd ~/.ssh [oracle@riyadh2 .ssh]$ cat id_rsa.pub >> authorized_keys [oracle@riyadh2 .ssh]$ scp authorized_keys riyadh1:/home/oracle/.ssh The authenticity of host 'riyadh1 (192.168.100.25)' can't be established. RSA key fingerprint is 6b:e4:a5:ef:a6:89:62:76:25:43:13:aa:49:ed:30:20. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added 'riyadh1,192.168.100.25' (RSA) to the list of known hosts. oracle@riyadh1's password: authorized_keys 100% 816 0.8KB/s 00:00
Now enable self ssh:
On riyadh1:
[oracle@riyadh1 .ssh]$ ssh riyadh1 The authenticity of host 'riyadh1 (192.168.100.25)' can't be established. RSA key fingerprint is 6b:e4:a5:ef:a6:89:62:76:25:43:13:aa:49:ed:30:20. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added 'riyadh1,192.168.100.25' (RSA) to the list of known hosts.
On Riyadh2:
[oracle@riyadh2 .ssh]$ ssh riyadh2 The authenticity of host 'riyadh2 (192.168.100.26)' can't be established. RSA key fingerprint is 6b:e4:a5:ef:a6:89:62:76:25:43:13:aa:49:ed:30:20. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added 'riyadh2,192.168.100.26' (RSA) to the list of known hosts.
Test ssh connectivity:
[oracle@riyadh1 ~]$ ssh riyadh1 date Wed Mar 18 14:33:07 EDT 2015 [oracle@riyadh1 ~]$ ssh riyadh2 date Wed Mar 18 14:33:10 EDT 2015
[oracle@riyadh2 ~]$ ssh riyadh1 date Wed Mar 18 14:33:25 EDT 2015 [oracle@riyadh2 ~]$ ssh riyadh2 date Wed Mar 18 14:33:27 EDT 2015
