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+Backup script consists of 3 parts.
+
+1) Source backuper.sh
+2) Backup definition
+3) Run command "backup"
+
+Backup is defined by these parameters:
+
+name - mandatory parametr; one word name of backup
+
+cmd - command that is subject of backup; e.g. pg_dumpall
+
+places - string list of places for tar
+
+exclude - list of places that tar ignores
+
+generate - command that grants access to backup; e.g. sudo
+
+remote - run backup command at different server
+
+run - run command before backup; see examples
+
+store_file - the result of backup should be stored in file
+
+store - specify command that stores backup
+
+
+Example of backup script:
+
+------------------------
+
+#!/bin/sh
+
+. backuper.sh
+
+name "postgres"
+remote "ssh srv"
+generate "sudo -u postgres"
+cmd "pg_dumpall"
+store_file "/mnt/data/backups"
+
+backup
+
+------------------------
+
+Examples of different backup definitions:
+
+(without "name" parameter and "backup" command)
+
+1) Backup all files from srv; exclude /proc, /sys/ and /dev and store it in file in /mnt/data folder:
+
+remote "ssh srv"
+places "/"
+exclude "/proc" "/sys" "/dev"
+store_file "/mnt/data"
+
+2) Backup some files from local computer and send it to srv (ssh force-command take care about rest):
+
+places "/etc /home"
+store "ssh srv"
+
+3) The same as 2; root is needed:
+
+places "/etc /home /root"
+generate "sudo"
+store "ssh srv"
+
+4) Run some important command before backup (on remote machine):
+
+remote "ssh root@srv"
+places "/"
+exclude "/proc" "/sys" "/dev"
+run "dpkg --get-selections > /tmp/list_of_packages"
+store_file "/mnt/data"