Tips for using .bashrc vs .bash_profile

.bashrc root updates (Rocky Linux 9 version):

# Added by CJ

# Set prompt
PS1="[\u@\h: \w]# "

PATH=$PATH:$HOME/bin:.
export PATH
unset USERNAME

alias ssh='ssh -Y'
alias vi='vim'
alias space='df -hP |grep -v tmpfs|grep -v efivarfs'
alias kernels='rpm -qa |grep kernel | sort'

# no funny characters in man pages
#export LC_ALL="en_US"

# Use 24-hour clock with 'date' command
export LC_TIME="en_GB.UTF-8"

# Combine history
export HISTSIZE=10000
export HISTCONTROL=ignoredups
export HISTTIMEFORMAT="%F %T "
shopt -s histappend