My ubuntu bash profile

.bashrc

# ~/.bashrc: executed by bash(1) for non-login shells.
# see /usr/share/doc/bash/examples/startup-files (in the package bash-doc)
# for examples

# If not running interactively, don't do anything
case $- in
    *i*) ;;
      *) return;;
esac

# don't put duplicate lines or lines starting with space in the history.
# See bash(1) for more options
HISTCONTROL=ignoreboth

# append to the history file, don't overwrite it
shopt -s histappend

# for setting history length see HISTSIZE and HISTFILESIZE in bash(1)
HISTSIZE=1000
HISTFILESIZE=2000

# check the window size after each command and, if necessary,
# update the values of LINES and COLUMNS.
shopt -s checkwinsize

# If set, the pattern "**" used in a pathname expansion context will
# match all files and zero or more directories and subdirectories.
#shopt -s globstar

# make less more friendly for non-text input files, see lesspipe(1)
[ -x /usr/bin/lesspipe ] && eval "$(SHELL=/bin/sh lesspipe)"

# set variable identifying the chroot you work in (used in the prompt below)
if [ -z "${debian_chroot:-}" ] && [ -r /etc/debian_chroot ]; then
    debian_chroot=$(cat /etc/debian_chroot)
fi

# set a fancy prompt (non-color, unless we know we "want" color)
case "$TERM" in
    xterm-color|*-256color) color_prompt=yes;;
esac

# uncomment for a colored prompt, if the terminal has the capability; turned
# off by default to not distract the user: the focus in a terminal window
# should be on the output of commands, not on the prompt
#force_color_prompt=yes

if [ -n "$force_color_prompt" ]; then
    if [ -x /usr/bin/tput ] && tput setaf 1 >&/dev/null; then
	# We have color support; assume it's compliant with Ecma-48
	# (ISO/IEC-6429). (Lack of such support is extremely rare, and such
	# a case would tend to support setf rather than setaf.)
	color_prompt=yes
    else
	color_prompt=
    fi
fi

# Git branch prompt
parse_git_branch() {
    git branch 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/(\1)/'
}

#Last command time and alert
function convert_secs {
    ((h=${1}/3600))
    ((m=(${1}%3600)/60))
    ((s=${1}%60))
    if [ $h -gt 0 ]; then printf "${h}h "; fi
    if [ $h -gt 0 ] || [ $m -gt 0 ]; then printf "\a${m}m "; fi
    if [ $s -gt 0 ]; then printf "${s}s "; fi
    #unset h m s
}

function timer_start {
    export last_command_timer=${last_command_timer:-$SECONDS}
}

function timer_stop {
    last_command_timer_time=$(($SECONDS - $last_command_timer))
    if [ -n $last_command_timer_time ] && [ $last_command_timer_time -gt 0 ]; then
        export last_command_timer_value="took $(convert_secs $last_command_timer_time)"
    else
        export last_command_timer_value=""
    fi
    unset last_command_timer last_command_timer_time
}

function timer_show {
    printf "\e[1;33m${last_command_timer_value}\e[0m"
    unset last_command_timer_value
}

trap 'timer_start' DEBUG
PROMPT_COMMAND=timer_stop

if [ "$color_prompt" = yes ]; then
    PS1='${debian_chroot:+($debian_chroot)}$(parse_git_branch)\[\033[01;32m\]\w\[\033[00m\] $(timer_show)\n\$ '
else
    PS1='${debian_chroot:+($debian_chroot)}$(parse_git_branch)\w $(timer_show)\n\$ '
fi
unset color_prompt force_color_prompt

# If this is an xterm set the title to user@host:dir
case "$TERM" in
xterm*|rxvt*)
    PS1="\[\e]0;${debian_chroot:+($debian_chroot)}\w\a\]$PS1"
    ;;
*)
    ;;
esac

# enable color support of ls and also add handy aliases
if [ -x /usr/bin/dircolors ]; then
    test -r ~/.dircolors && eval "$(dircolors -b ~/.dircolors)" || eval "$(dircolors -b)"
    alias ls='ls --color=auto'
    #alias dir='dir --color=auto'
    #alias vdir='vdir --color=auto'

    alias grep='grep --color=auto'
    alias fgrep='fgrep --color=auto'
    alias egrep='egrep --color=auto'
fi

# colored GCC warnings and errors
#export GCC_COLORS='error=01;31:warning=01;35:note=01;36:caret=01;32:locus=01:quote=01'

# some more ls aliases
alias ll='ls -alF'
alias la='ls -A'
alias l='ls -CF'

# Add an "alert" alias for long running commands.  Use like so:
#   sleep 10; alert
alias alert='notify-send --urgency=low -i "$([ $? = 0 ] && echo terminal || echo error)" "$(history|tail -n1|sed -e '\''s/^\s*[0-9]\+\s*//;s/[;&|]\s*alert$//'\'')"'

# Alias definitions.
# You may want to put all your additions into a separate file like
# ~/.bash_aliases, instead of adding them here directly.
# See /usr/share/doc/bash-doc/examples in the bash-doc package.

if [ -f ~/.bash_aliases ]; then
    . ~/.bash_aliases
fi

# enable programmable completion features (you don't need to enable
# this, if it's already enabled in /etc/bash.bashrc and /etc/profile
# sources /etc/bash.bashrc).
if ! shopt -oq posix; then
  if [ -f /usr/share/bash-completion/bash_completion ]; then
    . /usr/share/bash-completion/bash_completion
  elif [ -f /etc/bash_completion ]; then
    . /etc/bash_completion
  fi
fi

#BOOST C++ libraries read @ https://www.boost.org/doc/libs/1_77_0/more/getting_started/index.html
export BOOST_ROOT=/opt/${BOOST_VERSION}

alias clearCache='echo "echo 1 > /proc/sys/vm/drop_caches" | sudo sh && echo "echo 2 > /proc/sys/vm/drop_caches" | sudo sh && echo "echo 3 > /proc/sys/vm/drop_caches" | sudo sh'