2013-07-31 18:51:01 +00:00
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.. include:: global.rst.inc
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.. _detailed_usage:
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2013-08-04 19:23:12 +00:00
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Usage
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=====
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2013-07-31 18:51:01 +00:00
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|project_name| consists of a number of commands. Each command accepts
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a number of arguments and options. The following sections will describe each
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command in detail.
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Quiet by default
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----------------
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Like most UNIX commands |project_name| is quiet by default but the ``-v`` or
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``--verbose`` option can be used to get the program to output more status
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messages as it is processing.
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.. include:: usage/init.rst.inc
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This command initializes an empty :ref:`repository <repository_def>`.
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A repository is a filesystem directory
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containing the deduplicated data from zero or more archives.
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Encryption is enabled at repository initialization time.
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Examples
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~~~~~~~~
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::
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# Local backup repository
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$ attic init /data/mybackuprepo.attic
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# Remote backup repository
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$ attic init user@hostname:mybackuprepo.attic
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# Encrypted remote backup repository
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$ attic init --passphrase user@hostname:mybackuprepo.attic
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.. include:: usage/create.rst.inc
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This command creates a backup archive containing all files found while
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recursively traversing all paths specified. The archive will consume almost
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no disk space for files or parts of files that has already been archived by
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other archives.
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Examples
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~~~~~~~~
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::
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# Backups ~/Documents into an archive named "my-documents"
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$ attic create /data/myrepo.attic::my-documents ~/Documents
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# Backup ~/Documents and ~/src but exclude pyc files
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$ attic create /data/myrepo.attic::my-files \
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~/Documents \
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~/src \
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--exclude *.pyc
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# Backup the root filesystem into an archive named "root-YYYY-MM-DD"
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NAME="root-`date +%Y-%m-%d`"
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$ attic create /data/myrepo.attic::$NAME / --do-not-cross-mountpoints
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.. include:: usage/extract.rst.inc
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This command extracts the contents of an archive. By default the entire
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archive is extracted but a subset of files and directories can be selected
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by passing a list of ``PATHs`` as arguments. The file selection can further
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be restricted by using the ``--exclude`` option.
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Examples
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~~~~~~~~
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::
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# Extract entire archive
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$ attic extract /data/myrepo::my-files
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# Extract entire archive and list files while processing
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$ attic extract -v /data/myrepo::my-files
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# Extract the "src" directory
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$ attic extract /data/myrepo::my-files home/USERNAME/src
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# Extract the "src" directory but exclude object files
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$ attic extract /data/myrepo::my-files home/USERNAME/src --exclude *.o
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.. include:: usage/verify.rst.inc
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This command is similar to :ref:`attic_extract` but instead of writing any
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files to disk the command just verifies that all files are extractable and
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not corrupt. |project_name| will not compare the the archived files with the
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files on disk.
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.. include:: usage/delete.rst.inc
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This command deletes an archive from the repository. Any disk space not
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shared with any other existing archive is also reclaimed.
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.. include:: usage/list.rst.inc
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This command lists the contents of a repository or an archive.
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Examples
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~~~~~~~~
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::
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$ attic list /data/myrepo
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my-files Thu Aug 1 23:33:22 2013
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my-documents Thu Aug 1 23:35:43 2013
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root-2013-08-01 Thu Aug 1 23:43:55 2013
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root-2013-08-02 Fri Aug 2 15:18:17 2013
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...
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$ attic list /data/myrepo::root-2013-08-02
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drwxr-xr-x root root 0 Jun 05 12:06 .
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lrwxrwxrwx root root 0 May 31 20:40 bin -> usr/bin
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drwxr-xr-x root root 0 Aug 01 22:08 etc
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drwxr-xr-x root root 0 Jul 15 22:07 etc/ImageMagick-6
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-rw-r--r-- root root 1383 May 22 22:25 etc/ImageMagick-6/colors.xml
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...
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.. include:: usage/prune.rst.inc
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The ``prune`` command prunes a repository by deleting archives not matching
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any of the specified retention options specified. This command is normally
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used by automated backup scripts wanting to keep a certain number of historic
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backups.
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Examples
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~~~~~~~~
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::
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# Keep 7 end of day and 4 end of week archives
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$ attic prune /data/myrepo --daily=7 --weekly=4
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# Same as above but only apply to archive names starting with "foo"
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$ attic prune /data/myrepo --daily=7 --weekly=4 --prefix=foo
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.. include:: usage/info.rst.inc
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This command displays some detailed information about the specified archive.
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Examples
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~~~~~~~~
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::
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$ attic info /data/myrepo::root-2013-08-02
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Name: root-2013-08-02
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Fingerprint: bc3902e2c79b6d25f5d769b335c5c49331e6537f324d8d3badcb9a0917536dbb
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Hostname: myhostname
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Username: root
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Time: Fri Aug 2 15:18:17 2013
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Command line: /usr/bin/attic create --stats /data/myrepo::root-2013-08-02 / --do-not-cross-mountpoints
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Number of files: 147429
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Original size: 5344169493 (4.98 GB)
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Compressed size: 1748189642 (1.63 GB)
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Unique data: 64805454 (61.80 MB)
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.. include:: usage/mount.rst.inc
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This command mounts an archive as a FUSE filesystem. This can be useful for
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browsing an archive or restoring individual files. Unless the ``--foreground``
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option is given the command will run in the background until the filesystem
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is ``umounted``.
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Examples
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~~~~~~~~
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::
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$ attic mount /data/myrepo::root-2013-08-02 /tmp/mymountpoint
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$ ls /tmp/mymountpoint
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bin boot etc lib lib64 mnt opt root sbin srv usr var
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$ fusermount -u /tmp/mymountpoint
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.. include:: usage/change-passphrase.rst.inc
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The key files used for repository encryption are optionally passphrase
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protected. This command can be used to change this passphrase.
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Examples
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~~~~~~~~
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# Create a key file protected repository
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$ attic init --key-file /tmp/encrypted-repo
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Initializing repository at "/tmp/encrypted-repo"
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Enter passphrase (empty for no passphrase):
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Enter same passphrase again:
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Key file "/home/USER/.attic/keys/tmp_encrypted_repo" created.
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Keep this file safe. Your data will be inaccessible without it.
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# Change key file passphrase
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$ attic change-passphrase /tmp/encrypted-repo
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Enter passphrase for key file /home/USER/.attic/keys/tmp_encrypted_repo:
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New passphrase:
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Enter same passphrase again:
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Key file "/home/USER/.attic/keys/tmp_encrypted_repo" updated
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