Maneira bruta, minimalista e de linha de comando:
sleep 1500; gnome-screensaver-command -l; sleep 300; killall gnome-screensaver
Isso também pode ser transformado em atalho na área de trabalho ou em função .bashrc
Por que 1500 e 300? porque isso é segundos, 1500 segundos / 60 segundos por minuto = 25 minutos.
Abaixo está um script para um cronômetro que permite definir sessões variáveis e tempo de pausa, bem como métodos de sinalizar a pausa.
Lembre-se de que qualquer script no linux deve ser salvo como um arquivo e ter permissões executáveis definidas com chmod +x /path/to/script.sh. Feito isso, você pode vincular o script a um atalho, como mostrado em Como vincular arquivos .sh à combinação de teclado? ou crie um atalho na área de trabalho, como mostrado em Como criar lançadores na minha área de trabalho?
Ao iniciar o script, você verá um menu como este:
#!/bin/bash
# Author: Serg Kolo
# Date : Nov 17th, 2015
# Purpose: pomodoro timer script,
# with bunch of options
# Written for: https://askubuntu.com/q/696620/295286
#####################################################
# screenSaver function
# this one uses gnome-screensaver-command for locking
# and killall for unlocking the screen;
# $1 is provided from chooseBreakMethod function
#####################################################
function screenSaver
{
gnome-screensaver-command -l; sleep $1 ; killall gnome-screensaver
}
##############################################
# dialogBreak function
# this serves as "screensaver". The screen is never
# actually locked but rather we open terminal window
# with a simple command line dialog
# in full sccrean mode
# $1 provided in chooseBreakMethod function
##################################################
function dialogBreak
{
gnome-terminal --full-screen -e "bash -c 'sleep $1 | dialog --progressbox \"TAKE A BREAK\" 100 100 ' "
}
#################################################################
# dimScreen function
# dims the screen using xrandr; the --brightness
# can be configured
# for full or partial dimming using decimal values
# from 1 to 0
# $1 is provided from chooseBreakMethod function
################################################################
function dimScreen
{
xrandr | awk '$2 == "connected" {print $1}' | xargs -I % xrandr --output % --brightness 0.5
notify-send 'Take a Break'
sleep $1
xrandr | awk '$2 == "connected" {print $1}' | xargs -I % xrandr --output % --brightness 1
}
##############################
# getSettings function
# This is where the user enters
# the settings they want
# All the values must be integers
#############################
function getSettings
{
FORM=$(zenity --forms \ --title="Sergiy's Tomato Script" --text="Choose this session options" \
--add-entry="Number of Sessions (how many loops)" \
--add-entry="Session time (minutes)" \
--add-entry="Break time (minutes)" \
--add-entry="Dim,dialog,or screensaver? (1,2,3)" \
--separator=" " )
[ $? -eq 0 ] || exit 1
echo $FORM
}
################################
# chooseBreakMethod function
# A helper function that calls appropriate
# break method, based on the value we got
# from getSettings function
# Because dialogBreak calls gnome-terminal
# this function exits, so it doesn't wait
# Therefore we need to add additional sleep
# command
###############################
function chooseBreakMethod
{
# $1 is method passed from ${SETS[3]}
# $2 is break time passed from ${SETS[2]}
case $1 in
1) dimScreen $2 ;;
2) dialogBreak $2 ; sleep $2 ;;
3) screenSaver $2 ;;
esac
}
function minutesToSeconds
{
echo $(($1*60))
}
#################
# MAIN
#################
# get user settings and store them into array
# Item 0 : num sessions
# Item 1 : session duration
# Item 2 : break duration
# Item 3 : break method - lockscreen, dialog, or just
# turn off the screen
# SETS == settings
SETS=( $(getSettings) )
COUNTER=${SETS[0]}
#######################################
# This is where most of the job is done
# we loop according to number of session
# specified in the getSettings function
#########################################
notify-send 'Session started'
while [ $COUNTER -ne 0 ]; do
sleep $( minutesToSeconds ${SETS[1]} ) # session timer
chooseBreakMethod ${SETS[3]} $( minutesToSeconds ${SETS[2]} )
COUNTER=$(($COUNTER-1))
done
notify-send "tomatoScript is done"
####### END OF SCRIT ###########
