wanderleyteixeira / nvram-backup Goto Github PK

This script will backup specific [NVRAM](http://en.wikipedia.org/wiki/Non-volatile_random-access_memory “NVRAM”) variables and its values, and generates a script that can be used later to restore configurations. It is helpful after an upgrade or in the event of problems.

• Router (MIPSEL) flashed with Tomato Firmware

• Basic Linux knowledge

• A network mounted filesystem

• Tested on AC-66U running latest Shibby build

• Download the nvram-backup script to your desired backup directory (i.e. CIFS, USB, or NFS). I usually mount a CIFS1 or USB where I keep all backup data, logs, and scripts.

1. Login to your router
2. Click on Administration then Scripts
3. Paste the following in the Init tab and click to save

  REMOTE_PATH=<ADD FULL REMOTE PATH WHERE SCRIPT RESIDES>
  LOCAL_PATH=/tmp/nvrambackup
  if [ ! -s "$REMOTE_PATH" ]
    then
    sleep 5
    mkdir $LOCAL_PATH
    cp $REMOTE_PATH/nvram-backup.sh $LOCAL_PATH/nvram-backup.sh
    cp $REMOTE_PATH/nvram-backup.cfg $LOCAL_PATH/nvram-backup.cfg
    chmod a+x $LOCAL_PATH/nvram-backup.sh
  fi

• Choose the variables you would like to backup and place it on a file called nvram-backup.cfg. You can get a list of all variables and values currently available by ssh’ing to your router and execute the following command:

nvram show

• Run and verify:

sh /tmp/nvrambackup/nvram-backup.sh

• Add cronjob to run at 12:00AM on the first of every month:

cru a backup-nvram "0 0 1 * * /tmp/nvrambackup/nvram-backup.sh"

To restore, run the restore file generated by the main script then reboot the router.

Note: Use at your own risk. Be careful and thoughtful not to brick your router.