.bashrc

# Store 10,000 history entries
export HISTSIZE=10000
# Don't store duplicates
export HISTCONTROL=erasedups
# Append to history file
shopt -s histappend

# Conveniently download external resources:
#   fetch http://example.com/library.tar.gz
#   fetch ftp://example.com/file.zip
function fetch() {
  case "$1" in
    *.tar.gz) curl -L $1 | tar -zxv ;;
    *.tar.bz2) curl -L $1 | tar -jxv ;;
    *.zip) curl -L $1 > tmp.zip && unzip tmp.zip && rm tmp.zip ;;
  esac
}

.inputrc

"\ep":  history-search-backward
"\en":  history-search-forward
"\C-x\C-r": re-read-init-file