By default, CentOS 6 (and other RHEL clones) only provides transmission 2.13. There’s alternative repository from transmission official site but it isn’t really all that “latest” either (and I don’t fancy adding random repositories).

First, compile libevent2:

• install gcc and make
• download and extract the source
• ./configure --prefix=/opt/libevent2 && make && make install

And then compile transmission (hopefully you don’t need the gtk interface):

• install gcc-c++
• configure with PKG_CONFIG_PATH=/opt/libevent2/lib/pkgconfig ./configure --prefix=/opt/transmission --disable-nls --enable-daemon
• finally, make && make install
• if there’re missing dependencies, just install them (they’re all in repository apart of libevent2)

Don’t forget to add path to transmission in bash default profile (in /etc/profile.d/custom.sh):

PATH="/opt/transmission/bin:${PATH}"

And done! Enjoy the latest transmission.