_ Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top up vote down vote favorite 6 I'm used to synchronize my data on different machines.Depending on the data I use SVN, Dropbox or SSH (Unison).Is this possible with the bitcoin wallet, too?wallet up vote down vote It is, with three provisos.Never run the same wallet on more than one computer at a time.Never run an older copy of a wallet when a newer version exists.If you send any funds, make sure to keep the newer copy of the wallet.Make sure all client programs are linked to the same version of BerkeleyDB.Overall, I think it's just not a good idea.The client software wasn't designed to cleanly handle the many things that can go wrong.up vote 5 down vote Yes.The only file you need to worry about is wallet.dat (location dependent on operating system).If you copy that one file to another computer (or to a secure backup), you will have access to your money and address book.

Conversely, that is the only file you need to protect -- all of the other files should be safe to share without worrying about anyone getting their hands on your money.selling litecoin for usdThis only applies to your money and address book.ethereum ciscoIf you only copy wallet.dat, you will need to re-download the entire block chain on the other computer (so you may want to copy the other files too, but it is not necessary).bitcoin 1080tiThere is no point in backing up the other files, because if you need to, you can redownload everything else.bitcoin live wettenFinally, you should not leave your cleartext wallet in any server that you don't control (such as DropBox).bitcoin indonesia-1st

Make sure you encrypt it before backing it up.up vote down vote You can get yourself an online wallet at a site like Blockchain.bitcoin mining electricity billThen you can log in on the site from any computer to access your wallet.bitcoin tamil newsBrowse other questions tagged wallet or ask your own question.bitcoin multibitJump to: , Contents 1 2 3 The data directory is the location where Bitcoin's data files are stored, including the wallet data file.bitcoin suisse saBy default Bitcoin will put its data here: You need to do a "ls -a" to see directories that start with a dot.If that's not it, you can do a search like this: To change the directory Bitcoin stores its data in: By default Bitcoin will put its data here: Go to Start -> Run (or press WinKey+R) and run this: Bitcoin's data folder will open.

For most users, this is one of the following locations: If you have trouble browsing to these folders, note that "AppData" and "Application data" are hidden by default.Note: Using Dropbox to back up your Bitcoin data is not recommended as doing so introduces the following security concerns: For these reasons, an alternative that always uses password authentication such as Wuala should be used.Wuala's servers do not store your encryption key and the program authenticates with the password each time it is started.Whether you use Dropbox as your backup or not, it is advised to use what Steve Gibson calls "pre-Internet encryption" which means to use some form of encryption on your files before you back them up, in case an attacker gains access to that backup.Make sure to pick a password that is memorable but secure.The only file you need to back up is "wallet.dat" which can be done one of two ways.To make a copy of the wallet.dat file, ensure that Bitcoin is closed and copy this file somewhere else.

The other way is to use the backupwallet JSON-RPC command to back up without shutting down Bitcoin.Once a copy has been made, encrypt it, and put it in two or more safe locations.Consider the risk due to theft, fire, or natural disaster in proportion to the value of bitcoins stored in the wallet.Follow these instructions to backup all the bitcoin data (wallet and block chains) to an encrypted disk image.Don't forget to mount your image before using Bitcoin and unmount it after quitting.Follow these instructions to backup just the wallet.dat file.This results in a smaller disk image, but it's more complicated to do.Mount Wallet and launch Bitcoin Don't forget to mount your image before using Bitcoin and unmount after quitting it.Note: If you start the Bitcoin application without having the image mounted, the application will overwrite your symlink with a new wallet.If that happens, don't panic.Just delete the new wallet.dat, mount the image, and recreate the symlink like above.Automation: You can create a small application using Automator (included in OS X) to automatically mount the wallet and then launch Bitcoin App.

See the Screenshot on how to do this.If one doesn't want to use encrypted Disk images, then a small shell script can be used instead that takes care of decrypting the wallet, launching bitcoin client, and encrypting it after the client exits.This script works on both OSX and Gnu/Linux: bitcoin-launch-script One of the simplest methods for storing an appropriately encrypted archive of your wallet.dat file is to send the archive as an email attachment to your own e-mail address.Services like Gmail use very comprehensive distributed networks that make the loss of data very unlikely.One can even obfuscate the name of the files within the archive, and name the archive something less inviting, such as: 'personal notes' or 'car insurance'.Another solution is to use a file storage service like Wuala ( encrypted, instructions), Dropbox (after encrypting the wallet first) and others, including the more secure SpiderOak.Linux users can setup backups using cron by telling it to run a backup script at set intervals of time.

Run 'crontab -e' and add this line near the bottom: This cron line will run the /usr/local/bin/backupwallet.sh script at the 01 minute of every hour.Remember to add a newline after the last line of the crontab file, or else the last line won't run.You may also wish to ignore the script's output by appending " > /dev/null 2>&1" to the line (this will also prevent emails from being sent).#!/bin/bash # /usr/local/bin/backupwallet.sh # # Performs backup of bitcoin wallet.# # Written by: https://en.bitcoin.it/wiki/Securing_your_wallet # # Standard Options # TS=$(date "+%Y%m%d-%H%M") WALLET=/tmp/wallet-${TS} WALLET_E=/tmp/wallet-${TS}.crypt BITCOIN=bitcoind # /path/to/bitcoind GPG=gpg # /path/to/gpg GPG_USER=username # Username of gpg recipient.User should have gpg setup.RM=rm RM_OPTS='--force' USE_SHRED=0 # Flip to 1 to use `shred` instead of `rm`.SHRED=shred SHRED_OPTS='--force --iterations=9 --zero --remove' # # Storage Options # Only 1 set of options should be un-commented (the last one will be used).

# Update CP_DEST paths as neccessary.# # CP - Storage on a local machine.Could be Dropbox/Wuala folder.#CP=cp #CP_DEST='/var/data/backups/' # '~/Dropbox/', etc. # # SSH - Storage on a remote machine.CP=scp :~/wallets/' # # S3 - Storage on Amazon's S3.Be sure s3cmd is installed and properly setup.# You may need "s3cmd put --force" if you use a sub-directory in CP_DEST.#CP=s3cmd put #CP_DEST='s3://bucket' do_clean() { # Remove temporary wallets.if [ 1 -eq $USE_SHRED ]; then $SHRED $SHRED_OPTS $WALLET $WALLET_E else $RM $RM_OPTS $WALLET $WALLET_E fi } do_fail() { do_clean echo failed!exit 1 } # Perform the backup.echo -n Making backup... $BITCOIN backupwallet $WALLET [ !-s "$WALLET" ] && do_fail # If the backup does not exist or is empty, fail.echo -n Encrypting backup... $GPG -r $GPG_USER --output $WALLET_E --encrypt $WALLET [ 0 -ne $?] && do_fail # If gpg returns a non-zero result, fail.