Only users who use bash as their shell will have a .bashrc file in their home directory which is built from the skeleton file in /etc/skel/.bashrc and global definitions are kept in /etc/bashrc
Code:
# .bashrc
# User specific aliases and functions
alias rm='rm -i'
alias cp='cp -i'
alias mv='mv -i'
# Source global definitions
if [ -f /etc/bashrc ]; then
. /etc/bashrc
fi