duply man page
duply version 2.2 (http://duply.net)
Duply deals as a wrapper for the mighty duplicity magic. It simplifies running duplicity with cron or on command line by:
- keeping recurring settings in profiles per backup job
- enabling batch operations eg. backup_verify+purge
- executing pre/post scripts (different actions possible depending on previous or next command or it's exit status)
- precondition checking for flawless duplicity operation
For each backup job one configuration profile must be created. The profile folder will be stored under '~/.duply/<profile>' (where ~ is the current users home directory).
If the folder '/etc/duply' exists, the profiles for the super user root will be searched & created there.
- first time usage (profile creation):
duply <profile> create
- general usage in single or batch mode (see EXAMPLES):
duply <profile> <command>[[_|+|-]<command>[_|+|-]...] [<options> ...]
For batches the conditional separators can also be written as pseudo commands and(+), or(-). See Separators for details.
Non duply options are passed on to duplicity (see Options). All conf parameters can also be defined in the environment instead.
Indicated by a path or a profile name (<profile>), which is resolved to '~/.duply/<profile>' (~ expands to environment variable $HOME).
Superuser root can place profiles under '/etc/duply'. Simply create the folder manually before running duply as superuser.
Already existing profiles in root's home folder will cease to work unless they are moved to the new location manually.
- example 1:
duply humbug backup
Alternatively a _path_ might be used e.g. useful for quick testing, restoring or exotic locations. Shell expansion should work as usual.
The path must contain at least one path separator '/', e.g. './test' instead of only 'test'.
- example 2:
duply ~/.duply/humbug backup
- _ (underscore)
- + (plus sign), _and_
conditional AND the next command will only be executed if the previous succeeded
- - (minus sign), _or_
conditional OR the next command will only be executed if the previous failed
-  (square brackets), _groupIn_/_groupOut_
enables grouping of commands
’pre+[bkp-verify]_post' translates to ’pre_and_groupIn_bkp_or_verify_groupOut_post'
get usage help text
pseudo commands used in batches (see Separators above)
creates a configuration profile
backup with pre/post script execution (batch: [pre_bkp_post]), full (if full_if_older matches or no earlier backup is found) incremental (in all other cases)
execute '<profile>/pre', '<profile>/post' scripts
as above but without executing pre/post scripts
force full backup
force incremental backup
- list [<age>]
list all files in backup (as it was at <age>, default: now)
prints backup sets and chains currently in repository
- verify [<age>] [--compare-data]
list files changed, since age if given
- verifyPath <rel_path_in_bkp> <local_path> [<age>] [--compare-data]
list changes of a file or folder path in backup compared to a local path, since age if given
- restore <target_path> [<age>]
restore the complete backup to <target_path> [as it was at <age>]
- fetch <src_path> <target_path> [<age>]
fetch single file/folder from backup [as it was at <age>]
- purge [<max_age>] [--force]
list outdated backup files (older than $MAX_AGE) [use --force to actually delete these files]
- purgeFull [<max_full_backups>] [--force]
list outdated backup files ($MAX_FULL_BACKUPS being the number of full backups and associated incrementals to keep, counting in reverse chronological order) [use --force to actually delete these files]
- purgeIncr [<max_fulls_with_incrs>] [--force]
list outdated incremental backups ($MAX_FULLS_WITH_INCRS being the number of full backups which associated incrementals will be kept, counting in reverse chronological order) [use --force to actually delete these files]
- cleanup [--force]
list broken backup chain files archives (e.g. after unfinished run) [use --force to actually delete these files]
print changelog / todo list
feature for package maintainers - create a manpage based on the usage output. download txt2man from http://mvertes.free.fr/, put it in the PATH and run 'duply txt2man' to create a man page.
show version information of duply and needed programs
passed to duplicity (see commands: purge, purgeFull, purgeIncr, cleanup)
do nothing but print out generated duplicity command lines
disable encryption, overrides profile settings
For all time related parameters like age, max_age etc. Refer to the duplicity manpage for all available formats. Here some examples: 2002-01-25T07:00:00+02:00 (full date time format string) 2002/3/5 (date string YYYY/MM/DD) 12D (interval, 12 days ago) 1h78m (interval, 1 hour 78 minutes ago)
Pre Post Scripts
Some useful internal duply variables are exported to the scripts.
PROFILE, CONFDIR, SOURCE, TARGET_URL_<PROT|HOSTPATH|USER|PASS>, GPG_<KEYS_ENC|KEY_SIGN|PW>, CMD_ERR, RUN_START, CMD_<PREV|NEXT> (previous/next command), CND_<PREV|NEXT> (condition before/after)
The CMD_* variables were introduced to allow different actions according to the command the scripts were attached to e.g. 'pre_bkp_post_pre_verify_post' will call the pre script two times, with CMD_NEXT variable set to 'bkp' on the first and to 'verify' on the second run. CMD_ERR holds the exit code of the CMD_PREV .
- create profile 'humbug':
duply humbug create (don't forget to edit this new conf file)
- backup 'humbug' now:
duply humbug backup
- list available backup sets of profile 'humbug':
duply humbug status
- list and delete outdated backups of 'humbug':
duply humbug purge --force
- restore latest backup of 'humbug' to /mnt/restore:
duply humbug restore /mnt/restore
- restore /etc/passwd of 'humbug' from 4 days ago to /root/pw:
duply humbug fetch etc/passwd /root/pw 4D (see "duplicity manpage", section Time Formats)
- a one line batch job on 'humbug' for cron execution:
duply humbug backup_verify_purge --force
- batch job to run a full backup with pre/post scripts:
duply humbug pre_full_post
in profile folder '~/.duply/<profile>' or '/etc/duply'
profile configuration file
pre/post scripts (see above for details)
exported GPG key files
a globbing list of included or excluded files/folders (see "duplicity manpage", section FILE SELECTION)
Copy the _whole_ profile folder after the first backup to a safe place. It contains everything needed to restore your backups. You will need it if you have to restore the backup from another system (e.g. after a system crash). Keep access to these files restricted as they contain _all_ informations (gpg data, ftp data) to access and modify your backups.
Repeat this step after _all_ configuration changes. Some configuration options are crucial for restoration.
duplicity man page: duplicity(1) or http://duplicity.nongnu.org/duplicity.1.html