how to Set the .bash_profile in unix

oraprodev home

[oraprodev@apps11idev ~]$ vi .bash_profile
# .bash_profile

# Get the aliases and functions
if [ -f ~/.bashrc ]; then
        . ~/.bashrc
fi

# User specific environment and startup programs

PATH=$PATH:$HOME/bin
. /oradata/proddb/9.2.0/PROD_prod11i.env
export PATH
unset USERNAME

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# .bash_profile

# Get the aliases and functions
if [ -f ~/.bashrc ]; then
        . ~/.bashrc
fi

# User specific environment and startup programs

PATH=$PATH:$HOME/bin
. /appltop/prodappl/APPSORA.env
export PATH
unset USERNAME
~