How to compile and install Tarsnap on a Ubuntu/Debian Linux

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A Tarsnap service is a secure online backup system for Linux, OSX, *BSD or UNIX-like system. They encrypt and store data in Amazon S3. The services also use rsync-like algorithms, and only backup data that has been changed since the last dump. The backups are protected by a security key only known to a backup operator or sysadmin. How do I install a tarsnap client on a Ubuntu or Debian Linux system?
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How To Patch and Protect OpenSSH Client Vulnerability CVE-2016-0777 and CVE-2016-0778 [ 14/Jan/2016 ]

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A serious security problem has been found and patched in the OpenSSH software. Two vulnerabilities have been discovered in OpenSSH on 14/Jan/2016. The OpenSSH project released an ssh client bug info that can leak private keys to malicious servers. A man-in-the-middle kind of attack identified and fixed in OpenSSH are dubbed CVE-2016-0777 and CVE-2016-0778. How do I fix OpenSSH’s client vulnerability on a Linux or Unix-like operating system?