ITS UNIX Systems
Installing SSH Clients for Red Hat Linux
OpenSSH comes with most Linux installations. As an educational institution, UVa also has obtained the ssh.com implementation for no charge. If you don't have ssh configured, ITS recommends you install our ssh.com ssh rpm for version 3. This supports ssh version 2 (ssh2).
If you have OpenSSH installed, and you want to replace it with the ITS ssh rpm, you should remove OpenSSH, then apply the rpm described below.
If you are running RedHat Linux 7.1 or later, you're running the 2.4 kernel. Earlier releases of RedHat used the 2.2 kernel. The package to install for 2.2 is ssh-3.0.1-1.i386.rpm -- the instructions below reference a later release, but the same instructions apply to all of our ssh-3.x rpms. If you're running the 2.4 kernel, use the latest version you find in the directory.
Note: You should execute the following instructions as "root." The # at the beginning of the command lines is the bash prompt.
Mount the filesystem containing the rpms.
# mkdir /itc
# /bin/mount home1.virginia.edu:/vol/itc /itc # 2.4 kernel
# ln -s /itc/linux /linux
# cd /linux/RPMS
Uninstall OpenSSH
# ./rmopenssh.sh
This is a shell program which will identify any OpenSSH rpms installed and remove them from your system.
Install the package
# rpm -ivh ssh-3.2.2-1.i386.rpm
You'll see something similar to:
ssh ################################################# Hostkey not found at /etc/uva/ssh2/hostkey. Generating 1024-bit dsa key pair 4 .oOo..oOo.oO Key generated. 1024-bit dsa, root@bootp-13-196.bootp.Virginia.EDU, Wed Aug 23 2000 13:25:21 -0400 Key is stored with NULL passphrase. (This is not recommended. Don't do this unless you know what you're doing. If file system protections fail (someone can access the keyfile), or if the super-user is malicious, your key can be used without the deciphering effort.) Private key saved to /etc/uva/ssh2/hostkey Public key saved to /etc/uva/ssh2/hostkey.pub Assuming Red Hat Linux compatible and trying to configure... Please make sure you haven't specified sshd in /etc/rc.d/rc.local If you already have sshd running, you should restart it or reboot. Configuration done.
You are finished installing the ssh clients. The installation does not start the ssh daemon. Either reboot or run the command:
/etc/rc.d/init.d/sshd start
to start the daemon.
Page Updated: 2011-06-29
