Create a new Jekyll blog post from your command line.

.bashrc

# Add it to your .bashrc.
# Usage: create_post "My post name" 
#    or: create_post
# The script will generate the slug, ask for author's, ask 
# if you want to generate permalink and tags

function create_post {
  title=$1

  # if no post title was supplied
  if [[ -z "$title" ]]; then
    read -p "Enter the post title: " title
  fi

  slug=$(echo "$title" | iconv -t ascii//TRANSLIT | \
    sed -r s/[~\^´\`\']+//g | sed -r s/[^a-zA-Z0-9]+/-/g | \
    sed -r s/^-+\|-+$//g | tr A-Z a-z)

  dir='_posts/'
  # if _posts dir don't exists on current dir, test if we are inside the _posts dir
  if [ ! -d "_posts" ]; then
    dir=''
    if [[ $(pwd) != *_posts ]]; then
      echo "You must be inside the blog root or _posts dir"
      exit
    fi
  fi

  file="$dir$(date +%Y-%m-%d)-$slug.md"

  if [[ -f "$file" ]]; then
    echo "Post '$file' already exists"
  else
    touch "$file"
    echo "---" >> $file
    echo "title: \"$title\"" >> $file
    echo "date: $(date +'%Y-%m-%d %H:%M:%S %z')" >> $file
    echo "layout: post" >> $file

    read -p "Inform the post author [Enter to leave empty]: " author

    if [[ ! -z "$author" ]]; then
      echo "author: $author" >> $file
    fi

    while true; do
      read -p "Generate permalink? [y/n] " yn
      case $yn in
        [Yy]* ) echo "permalink: /$(date +%Y/%m/%d)/$slug/" >> $file; break;;
        [Nn]* ) break;;
            * ) echo "Please answer yes or no.";;
      esac
    done

    read -p "Inform the post tags (separated by semicolon) [Enter to leave empty]: " tags

    while IFS=';' read -ra tag; do
      for i in "${tag[@]}"; do
        sTags="$sTags  - $i\n"
      done
    done <<< "$tags"

    if [[ ! -z "$sTags" ]]; then
      printf "tags: \n$sTags" >> $file
    fi

    echo "---" >> $file
    echo "Post created: '$file'"
    
    unset sTags
  fi
}