NEW YORK, Aug 18- Oil prices rose for a sixth straight day, with Brent crude touching a six-week high above $50 a barrel on Thursday as the world's biggest producers prepared to discuss a possible freeze in production levels.
Linux Cron utility is an effective way to schedule a routine background job at a specific time and/or day on an on-going basis. This article is part of the on-going Productivity Tips For Geeks series. In this article, let us review 15 awesome examples of crontab job scheduling.
A user cannot use the crontab command if one of the following is true: 1  The cron.allow file and the cron.deny file do not exist (allows root user only). 2  The cron.allow file exists but the user's login name is not listed in it. 3  The cron.deny file exists and the user's login name is listed in it.