Random string / password generator bash / zsh / sh script / alias.

Output.txt

 RANDOM STRING  32  d6fBSJDVpQNymaMhgjWXMo0@bTS!9TxJ

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random-string.sh

# Add to your .bashrc / .zshrc to have a global command line alias.
# Add to a script.sh and remove the first and last line to use as a runnable script.
random_string() {
  local length=${1:-"16"}
  local random_str=$(cat /dev/urandom | LC_ALL=C tr -dc "A-Za-z0-9~_-.@!=:" | head -c $length)
  echo "\n\033[43m\033[97m RANDOM STRING \033[103m\033[90m ${length} \033[0m ${random_str}"
  $(echo -n "$random_str" | pbcopy)
  echo "\n\033[92mCopied to clipboard.\033[0m"
}