Steps to upgrade openssh package

1st Method

1.  Download the latest openssh package from http://www.openssh.org/ under /usr/local.

2.  Extract the package: # tar -xvf openssh-<version>.tar.gz

3.  Take a note of current SSH installation on the server by executing the following commands:

      # which ssh

      # rpm -qa | grep ssh

      # rpm -qf  `which ssh` 

      Also take a backup of /etc/ssh folder.

4.  Go to /usr/local/openssh-<version no>/ 

5.  Compile the openssh package as follows:

     # ./configure --with-kerberos5 --with-pam --with-md5-passwords 

6. make 

7. make install 

8. Check if the system is using the newly compiled openssh package by running the 'which' and 'ssh -v' command. 

9. Manually link the older version of  'ssh' command to new version:

   # mv /usr/sbin/ssh /usr/sbin/ssh_old

   # ln -s /usr/local/bin/ssh /usr/sbin/ssh  

2nd Method (by overriding existing SSH config)

1.  Download the latest openssh package from http://www.openssh.org/ under /usr/local.

2.  Extract the package: # tar -xvf openssh-<version>.tar.gz

3.  Take a note of current SSH installation on the server by executing the following commands:

      # which ssh

      # rpm -qa | grep ssh

      # rpm -qf  `which ssh` 

      Also take a backup of /etc/ssh folder.

4.  Go to /usr/local/openssh-<version no>/ 

5.  Compile the openssh package as follows:

./configure --prefix=/usr --sysconfdir=/etc/ssh --with-ssl-dir=/opt/openssl-0.9.8e --with-pam  --with-kerberos5 --with-md5-passwords --with-tcp-wrappers

6. make 

7. make install 

8. Check if the system is using the newly compiled openssh package by running the 'which' and 'ssh -v' command.