Do you want your shell to look like this?
alias ls='ls --color'
alias l='ls -la'
PS1='\[\033[1;33m\]\u\[\033[1;37m\]@\[\033[1;32m\]\H\[\033[1;31m\] \w\[\033[1;36m\]$ \[\033[0m\]'
Check enclosed files in this repository for examples, and how your files should be.
TIP: paste those lines of code above directly in shell for it to work immediately. Else it won't work until you logout/login again.