I made a bin directory in my home folder where I place all my scripts. Then in my .bashrc I added the following: export PATH=$PATH:/home/myusername/bin So I could access files I placed in there ...
I have Suse Linux on my desktop. So I am root and "normal" user. Frequently e.g. to start tomcat or install/remove a program I should use sudo or switch to super user. But I have defined many aliases ...