I'd like to cron a local backup to a locally mounted USB drive.  I'm using rsnapshot and want it to back up an LVM snapshot onto the USB drive.  But, unless I run the cron as root it complains that I can't make an LVM snapshot because I don't have permission to look at /dev/mapper/control.  Am I missing something?This is on CentOS 6.4.
rsnapshot LVM without root
sudo;rsync;root;lvm;rsnapshot
Take a look at this topic in the CentOS wiki, titled: rsnapshot Backups. It has examples that show how to backup using rsnapshot:excerpt from that page# crontab -e#MAILTO= ##Supresses outputMAILTO=me####################################################################minute (0-59),                                                   ##|    hour (0-23),                                                ##|    |        day of the month (1-31),                           ##|    |        |       month of the year (1-12),                  ##|    |        |       |       day of the week (0-6 with 0=Sunday)##|    |        |       |       |       commands                   ####################################################################15    02       *       *       *        /usr/bin/rsnapshot -c /etc/rsnapshot/laptop.rsnapshot.conf daily15    03       *       *       Sun      /usr/bin/rsnapshot -c /etc/rsnapshot/laptop.rsnapshot.conf weekly30    03       1       *       *        /usr/bin/rsnapshot -c /etc/rsnapshot/laptop.rsnapshot.conf monthlyI don't think you can do this as non-root, especially if you're interacting with the LVM. I found numerous tickets regarding the lack of access to LVM tools for non-root users.https://bugzilla.redhat.com/show_bug.cgi?id=620571Given this the crontab entry will have to be one that's run by root.