Newer versions of R(>=3.3.x) will not build without newer bzip2, zlib, libcurl & pcre. These dependencies are not available on older version of RHEL & CentOS i.e. anything below RHEL & CentOS 7. This blog post is a step-by-step journal of what I encountered when trying to compile & install R v3.3.2 on a CentOS 6 host.
At times I’d just like to run a script or a program without using my current or pre-existing shell environment variables. Running
bash -l doesn’t really help because it just starts a new bash shell login with the same environment variables from your
profile.d system-wide settings. Well, the other day I discovered prefixing your program/script with
env temporarily clears your environment variables so that your script just runs with totally no variables!
OpenPGP supports subkeys which are like the normal keys, except they’re bound to a master key pair. A subkey can be used for signing or for encryption. The really useful part of subkeys is that they can be revoked independently of the master keys, and also stored separately from them.
What is it?
MySQL replication allows you to ‘mirror’ databases on one or more servers(master) to one or more servers(slave). You can control what to replicate such as one or more databases, or even tables within a database i.e. selective replication.