Oracle Database Discussions

hello
i ahve install oracle on LInux first time. its my first interaction with LINUX. i know Linux a bit. it admistration is totally different so i'm face many problem. i have stuck wheni tried to install Oracle Critical Patch Update. i have read patch readme but it not so clear for me. below line describes path i dont know what is path it is Like enviroment variable path in windows or something else when i run this comamnd
export PATH=$PATH:/usr/ccs/bin i got some file like make and nm in bin directory. but i dont have file ID, ar in usr or i dont found CCS folder plz help what is path how i access this path if some files are missing how to install them i dont found any help over internet so plz help i would be thanks full to you

Ensure that the $PATH has the following executables: make, ar, ld, and nm.