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B096-016 B096-048 and B092-016 User Manual Page 165
14.8 Configuration backup and restore
Before backing up the configuration, you need to arrange a way to transfer the backup off-box.
This could be via an NFS share, a Samba (Windows) share to USB storage, or copied off-box via
the network. If backing up directly to off-box storage, make sure it is mounted.
/tmp is not a good location for the backup except as a temporary location before transferring it
off-box. The /tmp directory will not survive a reboot. The /etc/config directory is not a good
place either, as it will not survive a restore.
Backup and restore should be done by the root user to ensure correct file permissions are set.
The config command is used to create a backup tarball:
config -e <Output File>
The tarball will be saved to the indicated location. It will contain the contents of the
/etc/config/ directory in an uncompressed and unencrypted form.
Example nfs storage:
# mount -t nfs 192.168.0.2:/backups /mnt # config -e /mnt/xxxxx.config # umount/mnt/
Example transfer off-box via scp:
# config -e /tmp/xxxxx.config
# scp /tmp/xxxxx.config 192.168.0.2:/backups
The config command is also used to restore a backup:
config -i <Input File>
This will extract the contents of the previously created backup to /tmp, and then synchronize
the /etc/config directory with the copy in /tmp.
One possible problem that can occur here is that there is not enough room in /tmp to extract
files to. The following command will temporarily increase the size of /tmp:
mount -t tmpfs -o remount,size=2048k tmpfs /var
If restoring to either a new unit or one that has been factory defaulted, it is important to make
sure that the process generating SSH keys is either stopped or completed before restoring
configuration. If this is not done, then a mix of old and new keys may be put in place.