A duplicity titkosított növekményes mentést tesz lehetővé. A mentés tar formátumban történik. Távoli mentéshez a librsync könyvtárat használja. Titkosításhoz a GnuPG-t.
# apt install gnupg
Kulcspár létrehozása:
gpg --gen-key
$ gpg --gen-key
gpg (GnuPG) 2.1.18; Copyright (C) 2017 Free Software Foundation, Inc.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
gpg: directory '/home/janos/.gnupg' created
gpg: keybox '/home/janos/.gnupg/pubring.kbx' created
Note: Use "gpg --full-generate-key" for a full featured key generation dialog.
GnuPG needs to construct a user ID to identify your key.
Real name: Nagy János
Email address: janos@zold.and
You are using the 'utf-8' character set.
You selected this USER-ID:
"Nagy János <janos@zold.and>"
Change (N)ame, (E)mail, or (O)kay/(Q)uit? o
We need to generate a lot of random bytes. It is a good idea to perform
some other action (type on the keyboard, move the mouse, utilize the
disks) during the prime generation; this gives the random number
generator a better chance to gain enough entropy.
gpg: /home/janos/.gnupg/trustdb.gpg: trustdb created
gpg: key F04496D7577354DE marked as ultimately trusted
gpg: directory '/home/janos/.gnupg/openpgp-revocs.d' created
gpg: revocation certificate stored as '/home/janos/.gnupg/openpgp-revocs.d/007DA0FF9EA80EF3B080D386F04496D7577354DE.rev'
public and secret key created and signed.
pub rsa2048 2018-09-15 [SC] [expires: 2020-09-14]
007DA0FF9EA80EF3B080D386F04496D7577354DE
007DA0FF9EA80EF3B080D386F04496D7577354DE
uid Nagy János <janos@zold.and>
sub rsa2048 2018-09-15 [E] [expires: 2020-09-14]
apt install duplicity
cd duplicity --encrypt-key 'Nagy János <janos@zold.and>' doc file://docsbackup
$ duplicity --encrypt-key janos@zold.and doc file://docsbackupLocal and Remote metadata are synchronized, no sync needed. Last full backup date: none No signatures found, switching to full backup. --------------[ Backup Statistics ]-------------- StartTime 1537006597.94 (Sat Sep 15 12:16:37 2018) EndTime 1537006597.97 (Sat Sep 15 12:16:37 2018) ElapsedTime 0.03 (0.03 seconds) SourceFiles 2 SourceFileSize 4122 (4.03 KB) NewFiles 2 NewFileSize 4122 (4.03 KB) DeletedFiles 0 ChangedFiles 0 ChangedFileSize 0 (0 bytes) ChangedDeltaSize 0 (0 bytes) DeltaEntries 2 RawDeltaSize 26 (26 bytes) TotalDestinationSizeChange 518 (518 bytes) Errors 0 -------------------------------------------------
A mentés után kapunk egy docsbackup nevű könyvtárat. Nézzünk bele a könyvtárba:
ls docsbackup
$ ls docsbackup/ duplicity-full.20180915T101637Z.manifest.gpg duplicity-full.20180915T101637Z.vol1.difftar.gpg duplicity-full-signatures.20180915T101637Z.sigtar.gpg
Három állományt találunk:
A vol1.difftar.gpg tartalmazza az adatokat. A másik két fájl az inkrementális mentéshez tartalmaz inforációkat.
$ duplicity --encrypt-key janos@zold.and doc file://docsbackup Local and Remote metadata are synchronized, no sync needed. Last full backup date: Sat Sep 15 12:16:37 2018 --------------[ Backup Statistics ]-------------- StartTime 1537006817.01 (Sat Sep 15 12:20:17 2018) EndTime 1537006817.04 (Sat Sep 15 12:20:17 2018) ElapsedTime 0.03 (0.03 seconds) SourceFiles 2 SourceFileSize 4136 (4.04 KB) NewFiles 1 NewFileSize 4096 (4.00 KB) DeletedFiles 0 ChangedFiles 1 ChangedFileSize 40 (40 bytes) ChangedDeltaSize 0 (0 bytes) DeltaEntries 2 RawDeltaSize 47 (47 bytes) TotalDestinationSizeChange 540 (540 bytes) Errors 0 -------------------------------------------------
Mentés:
duplicity --encrypt-key janos@zold.and doc sftp://user@tavol.hu:docsbackup
Visszaállítás:
duplicity sftp://user@tavol.hu:docsbackup docsrestore
Visszaállás 5 nappal ezelőttre:
duplicity --time 5D \ --file-to-restore titkok/bar.txt \ sftp://user@tavol.hu:docsbackup docsrestore
Egy fájl adott időre visszaállítás:
duplicity --time 5D --file-to-restore titkok/bar.txt \ sftp://user@tavol.hu:docsbackup docsrestore
duplicity full /valahol/data file:///valahova/backup