Since Linux is all about choices we have provided as an alternative the commercial verion of OpenSSH, The SSH2 and these installation instructions assume
Commands are Unix-compatible.
The source path is /var/tmp
, other paths are possible.
Installations were tested on Red Hat Linux 6.1 and 6.2.
All steps in the installation will happen in super-user account root.
SSH2 version number is 2.0.13
Packages that you need can be downloaded from:
SSH2 Homepage:http://www.ssh.org/ |
You must be sure to download: ssh-2.0.13.tar.gz
|
once you have got the Tarballs, It is a good idea to make a list of files on the system before you install ssh2, and one afterwards, and then compare them using diff to find out what file it placed where. Simply run
find /* > SSH1
before and find /* > SSH2
after you install the software, and use diff SSH1 SSH2 > SSH-Installed
to get a list of what changed.
Before you Compile, you need to decompress the tarball tar.gz
.
[root@deep] /#cp ssh-version.tar.gz /var/tmp [root@deep] /#cd /var/tmp [root@deep ]/tmp#tar xzpf ssh-version.tar.gz
You need to Compile and Optimize so move into the new SSH2 directory and type the following commands on your terminal:
CC="egcs" \ CFLAGS="-O9 -funroll-loops -ffast-math -malign-double -mcpu=pentiumpro -march=pentiumpro -fomit-frame-pointer -fno-exceptions" \ ./configure \ --prefix=/usr \ --without-ssh-agent1-compat \ --disable-suid-ssh-signer \ --disable-tcp-port-forwarding \ --disable-X11-forwarding \ --enable-tcp-nodelay \ --with-libwrap
This tells SSH2 to set itself up for this particular hardware setup as follows:
Leave out ssh-agent1 compatibility.
Install ssh-signer without suid bit.
Disable port forwarding support.
Disable X11
forwarding support.
Enable TCP_NODELAY
socket option.
Compile in libwrap tcp_wrappers
support.
[root@deep ]/ssh-2.0.13#make clean [root@deep ]/ssh-2.0.13# make [root@deep ]/ssh-2.0.13# make install [root@deep ]/ssh-2.0.13#rm -f /usr/bin/ssh-askpass
The make clean, command erase all previous traces of a compilation so as to avoid any mistakes, |
The make command compiles all source files into executable binaries, |
The make install command installs the binaries and any supporting files into the appropriate locations. |
Please don't forget to cleanup after work:
[root@deep] /#cd /var/tmp [root@deep ]/tmp#rm -rf ssh-version/ ssh-version.tar.gz
The rm command as used above will remove all the source files we have used to compile and install SSH2. It will also remove the SSH2 compressed archive from
the /var/tmp
directory.