Cron

# cron-time:
# .---------------- Minutes (0 - 59)
# |  .------------- Hours (0 - 23)
# |  |  .---------- Day of the month (1 - 31)
# |  |  |  .------- Month in years (1 - 12)
# |  |  |  |  .---- Days in a week (0 - 6)
# |  |  |  |  |
# *  *  *  *  * sys_linux > script to be executed.