export command for arm-linux-gcc

i downloaded arm-linux-gcc-4.4.3 and install it to /home/armgcc on fedora 9

then i type the command $ export PATH=$PATH:/home/armgcc/..../bin 
and "arm-linux-gcc  -v" show me the version of the compiler 

but when i closed the terminal and then again open i type the command
"arm-linux-gcc -v"
this shows me a "bash:....not a command" 

why i have to type again $ export PATH=$PATH:/home/armgcc/...../bin
everytime when i open the terminal ??
 
regards

Run "man bash", search for the 'export' keyword and read how environment
variable inheritance is really working in Bash.
After that I'm sure you will add this export command into your local
~/.bashrc or the global /etc/bashrc (or whatever shell you are using).