bash. Clear terminal after each command.

gistfile1.txt

# add it to ~/.bash_profile

# Clear terminal before each command execution
preexec () {
  echo -e "\033];$1\007";
  echo -e "\033[1;34m------------------------------------------------------------------------------------------------\033[0m";
  clear;
  echo -e "\033[1;34m$1\033[0m";
}
preexec_invoke_exec () {
    [ -n "$COMP_LINE" ] && return                     # do nothing if completing
    [ "$BASH_COMMAND" = "$PROMPT_COMMAND" ] && return # don't cause a preexec for $PROMPT_COMMAND
    local this_command=`history 1 | sed -e "s/^[ ]*[0-9]*[ ]*//g"`; # obtain the command from the history, removing the history number at the beginning
    preexec "$this_command"
}
trap 'preexec_invoke_exec' DEBUG