The /root directory is only accessible by root. You shouldn't put applications there. Also, roots home directory shouldn't be in the path. Consider another place such as /usr/local/sbin/ or /usr/sbin/ if it is an administrative program or /usr/local/bin or /usr/bin/ if a normal user runs it.
These are standard paths and should already be in your path. If not, add the line "PATH=$PATH:/usr/local/bin/" to your ~/.profile file. (assuming you are running the bash shell).
Use your systems config program to set the hostname. You will also need to log out of KDE after changing the hostname. It will probably change the contents of /etc/HOSTNAME.
The value of HISTSIZE would probably be best set in ~/.bashrc. Check both your ~/.profile and ~/.bashrc files and see if they are already set in one of them.
Generally, for things that get set once, when you login, use ~/.profile. Especially for changing your PATH, because .bashrc is sourced every time you start a new shell.
Last edited by jschiwal; 05-17-2007 at 08:24 AM.