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==Additional File System MaintainanceMaintenance==
[[Image:mount.png|thumb|400px|right|Using the '''mount''' command with no arguments displays file-systems that are already mounted. The Linux system administrator can use the '''mount''' and '''umount''' commands to connect and disconnect different partitions from the file-system to perform maintenance.]]
If we need more space, then we can use LVM to help us out!
'''<u>Scheduling Routine Tasks (Crontab)</u>'''
Cron Tables (crontabs) allow the Linux System Administrator to run useful shell scripts or shell script that we have created at specific dates/times. It would be silly to expect a system administrator to stay up late (eg. 2 a.m.) to manually run a shell script to terminate processes or to re-boot Linux servers. Database files (tables) are used to provide instructions on how frequent shell scripts or commands can be run. The '''cron''' daemon is used to refer to these files and to run them on a pre-determined basis. The term '''cron''' comes from the old word '''chronograph''' meaning a special type of watch (actually a ''stop-watch'') to help monitor and schedule routine tasks.
You will learn in the lab how to create and use crontabs to run periodically a shell script that will send an e-mail warning to the system administrator if disk space capacity has reached a level for immediate resolution.