Edo wrote: > Hi, > > > On Wednesday, July 13, 2011 at 1:50 PM, Nguyen Vu Hung (VNC) wrote: > >> Hello all, >> >> I am running CentOS 5.6 64 bit. >> >> When running "yum -y install ncurses-devel", >> I expect that only ncurses 64 bit version will be installed. > > Try: yum -y install ncurses-devel.x86_64 > > Or, add “exclude=*.i?86” in your /etc/yum.conf before running the same command you did earlier. > > HTH, > RHEL/CentOS always installs both 32-bit and 64-bit libraries, that is the way Red Hat wanted it, so Applications designed only as 32-bit can run without any modification on 64-bit system. If you check other packages, you will see many have 32-bit counterparts. This is normal behavior without any repercussions, so unless you intend to remove all 32-bit libraries from your system, I recommend to go ahead and install both 32-bit and 64-bit packages. Ljubomir