On May 21, Thomas Föcking
Once a week this simply script is ran: (only this script has cap_sys_rawio and write access on /dev/sdb) dd if=/dev/sda of=/dev/sdb bs=16M You will have two problems with this: Minor: Only data lost during the last week can be restored. If you delete a file, go on holiday for two weeks and want to restore it later, there is no chance. Major: Changes in the filesystem during this "backup" will most likely ruin your copy ... !
You also didn't tell us, which services you are offering. Web only? User authentication? SMTP/POP/IMAP? ... Every service that is used to authenticate users should use encryption (SSL/TLS). World: ftp, ssh, http, https Anonymous ftp only, hopefully?
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