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           beyerle@PS | 
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           #!/bin/bash
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           #
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           # Saves data to a usbstick (default) 
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           # or a partition (user input)
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           # Scientific Linux Live CD
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           #
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           # Urs Beyerle, PSI
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           #
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              | 
        
        
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           ### definitions
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           CONFIG_FOLDER=""
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           MOUNTDIR=livecd
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           . /$MOUNTDIR/live/liblinuxlive
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           # PSI setup?
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           PSI=$( cmdline_parameter psi )
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           if [ $PSI ]; then
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               SAVEFOLDER=PSI_LIVECD
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           else
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               SAVEFOLDER=SL_LIVECD
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           fi
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           echo 
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           ### this script should be run as root 
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           #   (if not, somethings will not be stored)
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           if [ "$( whoami )" != "root" ]; then
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               echo "********************************************"
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               echo "WARNING: Run this script as root or sudo !!"
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               echo "As normal user not everything will be saved."
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               echo "Run instead: # sudo $0"
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               echo "********************************************"
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               echo
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               echo "Press a key to continue (CTRL-C to exit)"
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               read -n 1
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           fi
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              | 
        
        
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           ### search usb sticks
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           echo "Search for usbstick..."
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           USBMOUNT=$( grep -i /media/usb /etc/fstab | tail -n 1 | awk '{ print $2 }' )
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           if [ $USBMOUNT ]; then
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               # mount usbstick, if not already mounted
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               mount | grep -q " $USBMOUNT " 
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               if [ "$?" != "0" ]; then
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           	echo "Mount $USBMOUNT"
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           	mount $USBMOUNT 2>/dev/null
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               fi
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           fi
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              | 
        
        
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           ### if no usbstick, ask the user for a partition
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           if [ ! $USBMOUNT ]; then
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               echo "No usbstick found."
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               echo "Type in a partition you want to store the data to."
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               echo -n "(e.g. /dev/hda1, /dev/sda1, ...): "
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               read MOUNT_DEV
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               # search $MOUNT_DEV in fstab
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               USBMOUNT=$( grep "^$MOUNT_DEV " /etc/fstab | tail -n 1 | awk '{ print $2 }' )
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               if [ ! $USBMOUNT ]; then
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           	mkdir -p /mnt/$MOUNT_DEV
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           	USBMOUNT=/mnt/$MOUNT_DEV
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               fi
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               # mount read write 
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               mount -rw $MOUNT_DEV $USBMOUNT 2>/dev/null
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               if [ "$?" != "0" ]; then
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           	echo "ERROR: Can not mount $MOUNT_DEV to $USBMOUNT"
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           	sleep 5; exit 1
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               else
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           	echo "Mounted $MOUNT_DEV to $USBMOUNT."
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               fi
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           fi
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              | 
        
        
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           ### search for $SAVEFOLDER on $USBMOUNT
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           if [ -d $USBMOUNT/$SAVEFOLDER ]; then
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               CONFIG_FOLDER=$USBMOUNT/$SAVEFOLDER
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               echo "Found folder '$SAVEFOLDER' on $USBMOUNT."
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           else
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               mkdir -p $USBMOUNT/$SAVEFOLDER
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               if [ "$?" = "0" ]; then
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           	echo "Folder $SAVEFOLDER created on $USBMOUNT."
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           	CONFIG_FOLDER=$USBMOUNT/$SAVEFOLDER
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               else
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           	echo "ERROR: Can not write to $USBMOUNT."
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           	CONFIG_FOLDER=""
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               fi
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           fi
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           ### Create README.txt in $CONFIG_FOLDER
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           echo "Do not delete this folder!" > $CONFIG_FOLDER/README.txt
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           echo "It is used to store your data from LiveCD." >> $CONFIG_FOLDER/README.txt
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           if [ "$?" = "0" ]; then
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               echo "Saved $CONFIG_FOLDER/README.txt"
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           else
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               echo "ERROR: Could not save $CONFIG_FOLDER/README.txt !"
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           fi
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           ### put parameter "keyboard" to config (if not yet there)
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           CONFIG_FILE=$CONFIG_FOLDER/config
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           grep -q "KEYBOARD=" $CONFIG_FILE 2>/dev/null
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           if [ "$?" != "0" ]; then
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               # what keyborad do I have?
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               . /etc/sysconfig/keyboard
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               echo KEYBOARD=$KEYTABLE >> $CONFIG_FILE
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               echo "Saved $CONFIG_FILE"
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           fi
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           ### put restore script to setup (if setup does not yet exists)
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           SETUP_FILE=$CONFIG_FOLDER/setup
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           if [ ! -e $SETUP_FILE ]; then
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               cat > $SETUP_FILE <<'EOF'
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           #!/bin/bash
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           #
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           # restore tar.gz files, if found on usbstick
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           files=$( ls $CONFIG_FOLDER/*.tar.gz )
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           cd /
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           for file in $files; do
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               tar xfzP $file 2>/dev/null
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               if [ "$?" = "0" ]; then
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           	    echo "$file restored."
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               fi
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           done
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           EOF
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               echo "Saved $SETUP_FILE"
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           fi
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           ### save /home, /etc/passwd /etc/shadow, ...
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           #   as tar.gz. files
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           echo "Start saving tar.gz files to $CONFIG_FOLDER:"
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           SAVES="/home \
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                  /root \
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                  /etc/passwd \
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                  /etc/shadow \
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                  /etc/group"
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           for save in $SAVES; do
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               echo -n "Save $save ... "
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               tar cfzP $CONFIG_FOLDER/$( basename $save ).tar.gz $save
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               if [ "$?" = "0" ]; then
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           	echo " done."
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               else
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           	echo "ERROR: Could not save $save to $USBMOUNT !"
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               fi
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           done
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           ### save /etc/X11/xorg.conf
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           cp -a /etc/X11/xorg.conf $CONFIG_FOLDER/
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           echo "Xserver configuration file 'xorg.conf' saved to $CONFIG_FOLDER." 
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           ### inform user
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           echo "If you don't want to keep one of these config files, just delete it."
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           echo
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           ### umount $USBMOUNT
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           echo "Unmount $USBMOUNT"
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           umount $USBMOUNT 2>/dev/null
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           echo "$0 finished."
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           echo
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           echo "Please <press a key> ..."
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           read -n 1
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