Hello. I just fresh-installed 5.3 onto my laptop, and I have a problem trying to get wifi working. Be aware that I have 5.2 on it, and did the same process, and it worked great! I'm using http://wiki.centos.org/HowTos/Laptops/WirelessAR5007EG -- as I did for 5.2. The problem arises in section 6: [mpk at a3680 madwifi-hal-0.10.5.6-r3968-20090402]$ make /bin/sh: line 0: cd: /lib/modules/2.6.18-128.el5/build: No such file or directory Makefile.inc:66: *** /lib/modules/2.6.18-128.el5/build is missing, please set KERNELPATH. Stop. [mpk at a3680 madwifi-hal-0.10.5.6-r3968-20090402]$ ls ath BuildCaps.inc hal kernelversion.c Makefile.kernel README release.h THANKS ath_hal contrib include Makefile net80211 README.dfs scripts tools ath_rate COPYRIGHT INSTALL Makefile.inc patch-kernel regression SNAPSHOT Q: 'make' can be run as $ - correct? In another terminal: [root at a3680 tmp]# whatprovides build -bash: whatprovides: command not found [root at a3680 tmp]# rpm -q gcc gcc-c++ make kernel-devel gcc-4.1.2-44.el5 gcc-c++-4.1.2-44.el5 make-3.81-3.el5 kernel-devel-2.6.18-128.1.6.el5 I haven't a clue what's going on here, or how to fix it. Google's linux SE couldn't find any hits.