jepoy wrote: > follow up question, im doing a backup script with help of crond. if i > edit my root crontab will it affect my other cronjobs ? like for an > example my clamav updates every hour. <snip> > ill be using the root to run my backup cron jobs. when i check my crontab > [EMAIL PROTECTED] home]# crontab -u root -l > no crontab for root > > will this affect my other cronjobs running on root ?
Note that /etc/crontab is the main system crontab, not root's crontab. While both will run as root they're considered distinct. Just to clear out this possible source of confusion. To answer your question, cron does no locking of resources on its own. If one cron job writes something to a file and another cron job that writes to the same file gets started while the first one isn't finished yet, then obviously you'll have problems unless the two jobs do file locking on their own. Usually though, this isn't an issue, and it's often plainly obvious when it might be one. In your example, with your clamav update and your backup scripts, unless you're trying to back up the files clamav generates on update, you shouldn't have problems. -- To err is human, but to foul things up takes a computer. And to make a total disastrous mess takes a computer *operated* by a human. http://stormwyrm.blogspot.com/ _________________________________________________ Philippine Linux Users' Group (PLUG) Mailing List [email protected] (#PLUG @ irc.free.net.ph) Read the Guidelines: http://linux.org.ph/lists Searchable Archives: http://archives.free.net.ph
