备份Gentoo Linux的脚本，适用其他Linux的备份

#!/bin/bash

# Backup script for Gentoo Linux

# Author: Reto Glauser aka blinkeye

# Homepage: http://blinkeye.ch

# Mailto: stage4 at blinkeye dot ch

# Date: 23.03.2005

# If you need further infos check out this post: http://forums.gentoo.org/viewtopic.php?p=1751698#1751698

version=v1.2

# these are the commands we actually need for the backup

command_list="echo tar hostname date split"

# verify that each command we use exists

for command in $command_list; do

path=`which $command | grep "no $command in"`

if [ ! -x `which $command` -a "$path" ]; then

echo -e "\n\nERROR: $command not found! Check your commands and/or your \$PATH"

exit -1

fi

done

# options for the tar command

tarOptions="--create --absolute-names --preserve-permissions --totals --bzip2 --ignore-failed-read --verbose --file"

# where to put the stage4

stage4Location=/mnt/backup/stage4

# name prefix

stage4prefix=$(hostname)-stage4-`date +\%d.\%m.\%Y`

# these files/directories are always excluded

default_exclude_list="

--exclude=/tmp/*

--exclude=/var/tmp/*

--exclude=/lost+found/*

--exclude=/dev/*

--exclude=/proc/*

--exclude=/mnt/*

--exclude=/sys/*

--exclude=/usr/portage/*

--exclude=/var/log/*

--exclude=$stage4Location"

# depending on your choice these files or directories will additionally be excluded

custom_exclude_list="

--exclude=/usr/src/*

--exclude=/opt/mathematica

--exclude=/usr/share/smssend

--exclude=/home/*"

# check the folder/files stored in $default_exclude_list exist

for exclude in $default_exclude_list; do

if [ ! -e "`echo "$exclude" | cut -d'=' -f2 | cut -d'*' -f1`" ]; then

echo -e "\n\nERROR: `echo "$exclude" | cut -d'=' -f2` not found! Check your \$default_exclude_list"

fi

done

# check the folder/files stored in $custom_exclude_list exist

for exclude in $custom_exclude_list; do

if [ ! -e "`echo "$exclude" | cut -d'=' -f2 | cut -d'*' -f1`" ]; then

echo -e "\n\nERROR: `echo "$exclude" | cut -d'=' -f2` not found! Check your \$custom_exclude_list"

fi

done

# print out the version

echo -e "\nBackup script $version"

echo -e "==================="

# how do you want to backup?

echo -e "\nWhat do you want to do? (Use CONTROL-C to abort)\n

(1) Minimal backup

(2) Interactive backup"

while [ "$option" != '1' -a "$option" != '2' ]; do

echo -en "\nPlease enter your option: "

read option

done

case $option in

1)

stage4Name=$stage4Location/$stage4prefix-minimal

final_command="tar $default_exclude_list $custom_exclude_list $tarOptions $stage4Name.tar.bz2 / /var/log/emerge.log"

;;

2)

for folder in $custom_exclude_list; do

echo -en "Do you want to backup" `echo "$folder" | cut -d'=' -f2`"? (y/n) "

read answer

while [ "$answer" != 'y' -a "$answer" != 'n' ]; do

echo "please enter y or n"

read answer

done

if [ "$answer" == 'n' ]; then

default_exclude_list="$default_exclude_list $folder"

fi

done

stage4Name=$stage4Location/$stage4prefix-custom

final_command="tar $default_exclude_list $tarOptions $stage4Name.tar.bz2 / /var/log/emerge.log"

;;

esac

# show what will be done

echo -e "\n* creating the stage4 at $stage4Location with the following options:\n\n"$final_command

# everything is set, are you sure to continue?

echo -ne "\nDo you want to continue? (y/n) "

read answer

while [ "$answer" != 'y' ] && [ "$answer" != 'n' ]; do

echo "please enter y or n"

read answer

done

if [ "$answer" == 'y' ]; then

# mount boot

echo -e "\n* mount boot"

mount /boot >/dev/null 2>&1

# if necessary, create the stage4Location

if [ ! -d "$stage4Location" ] ; then

echo "* creating directory $stage4Location"

mkdir -p $stage4Location

fi

# check whether the file already exists

if [ -a "$stage4Name.tar.bz2" ]; then

echo -en "\nDo you want to overwrite $stage4Name.tar.bz2? (y/n) "

read answer

while [ "$answer" != 'y' ] && [ "$answer" != 'n' ]; do

echo "please enter y or n"

read answer

done

if [ "$answer" == 'n' ]; then

echo -e "\n* There's nothing to do ... Exiting"

exit 0;

fi

fi

# do the backup

time $final_command

# copy the current world file to the stage4 location

echo -e "\n* creating stage4 overview $stage4Name.txt"

cp /var/lib/portage/world $stage4Name.txt >/dev/null 2>&1

# we finished, clean up

echo "* stage4 is done"

echo "* umounting boot"

umount /boot

else

echo -e "\n* There's nothing to do ... Exiting"

fi

#Uncomment the following command if you want to split the archive in cd size chunks:

#split --suffix-length=1 --bytes=670m $stage4Name.tar.bz2 "$stage4Name".tar.bz2_ && echo "* splitting is done"