Create a .bashrc file(if not exist) using the command: $ vi ~/.bashrc then update it. Once updated we run this command: $ source ~/.bashrc

.bashrc

## Add git branch name in Terminal
force_color_prompt=yes
parse_git_branch() {
  git branch 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/ (\1)/'
}
## export PS1="\u@\h \[\033[32m\]\w\[\033[33m\]\$(parse_git_branch)\[\033[00m\] >\n$ "
export PS1="${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\[\033[33m\]\$(parse_git_branch)\[\033[00m\] >\n$ "

## Git shortcuts
alias gitlogtree="git log -n 10 --graph --decorate -30 --all --date-order --date=format:'%Y-%m-%d %H:%M:%S' --pretty=format:'%C(cyan)%h%Creset %C(black bold)%ad%Creset%C(auto)%d %s'"
alias gitlog="git log -n 10 --pretty=format:'%Cgreen%h%Creset%x09%C(cyan)%an%Creset%x09%C(black bold)%ad%Creset%x09%s'"
alias gl='gitlog'

## Git commands
alias c='git cola'
alias gs='git status'
alias gf='git fetch && git pull --rebase'
alias o='git remote show origin'


## gitlog n - can accept arguments
function gitlog() {
  arg1=${1:-10}
  git log -n $arg1 --pretty=format:'%Cgreen%h%Creset%x09%C(cyan)%an%Creset%x09%C(black bold)%ad%Creset%x09%s'
}


## Clear the screen
alias cls='clear;clear'

export DOCKER_RAILS_MYSQL_HOST=172.17.0.2
export DOCKER_RAILS_MYSQL_PORT=3306
export DOCKER_RAILS_MYSQL_USER=root
export DOCKER_RAILS_MYSQL_PASW=webdevel
export DOCKER_RAILS_MYSQL_DB=railsBookDB

## Automatic run: On cd command it will check .ruby-version file and then run uru auto
cd() {
  if builtin cd ${1:+"$@"} && [ -e .ruby-version  ]; then
    uru auto
  fi
}

## Remove log files inside the log/ folder. We should run this in the root of your application.
## Example usage: rmlog && npm start
function rmlog() {
  # <app-root> / log
  # check if log folder is exist.
  if [ -d "log" ]
  then
    echo "[rmlog()] log folder found!"
     rm -rf *.*
  else
    echo "[rmlog()] log folder does not exist."
  fi
}

## Export the node .env environment variables. We should run this in the roo app where .env resides.
## Example usage: myenv && npm start
function myenv() {
 echo "========================================="
 echo " "
 echo ".env variables successfully loaded!! "
 echo " "
 echo "========================================="
 set -o allexport; source .env; set +o allexport
}

function rand() {
  cat /dev/urandom | base64 | head -n 1 |tr -dc '[:alpha:]' |cut -c -8
}

## Github multiple accounts
## $ cat ~/.ssh/config
## Host *github.com
##   User git
##   IdentityFile ~/.ssh/company_id_rsa
## 
## Host *github-sudogem
##   Hostname github.com
##   User git
##   IdentityFile ~/.ssh/sudogem_id_rsa.pub

## Github login
# For Windows
function github_autologin() {
eval $(ssh-agent)
ssh-add "/c/Users/My Company/.ssh/sudogem_id_rsa"
}
github_autologin

# For Ubuntu
function github_autologin_sudogem() {
eval $(ssh-agent)
ssh-add ~/.ssh/id_rsa_sudogem
}
github_autologin_sudogem

Then run this command to execute the bashrc file in the current terminal: $ source ~/.bashrc