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Top Forums Shell Programming and Scripting Showing off my rsync-to-USB script Post 302363654 by wolfv on Wednesday 21st of October 2009 02:27:23 AM
Old 10-21-2009
Quote:
Originally Posted by steadyonabix
Nice Smilie

You might want to add a check that the destination path is writable as well.
steadyonabix,

Thanks for the suggestion. Here is the code change:
Code:
abort()
{
	echo "$1"
	echo "Backup aborted"
	exit
}

#check destination_path
if [ ! -d "$destination_path" ]
then
	abort "Destination path does not exist: $destination_path"
fi
if [ ! -w "$destination_path" ]
then
	abort "Destination path write permission is not granted: $destination_path"
fi



---------- Post updated at 02:27 AM ---------- Previous update was at 02:08 AM ----------

Quote:
Originally Posted by ripat
If you want to do rotating (incremental) backups, rsync can create hard links on the destination server. Hard links will conserve disk space on your USB key while doing rotating backups.
Hi ripat,

The script uses the --link-dest option. So by implication, hard links are used. However, the script does not automatically delete old backups like some other rotating-backup scripts. The script was designed to backup to USB memory, so there is not reason to automate. I use it on my home PC:
  1. insert the USB memory
  2. delete old backups manually (if more space is needed)
  3. run the script manually
  4. physically remove the USB memory
  5. store the USB memory in a safe place

Last edited by wolfv; 10-21-2009 at 08:01 PM..
 

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LN(1)								   User Commands							     LN(1)

NAME
ln - make links between files SYNOPSIS
ln [OPTION]... [-T] TARGET LINK_NAME (1st form) ln [OPTION]... TARGET (2nd form) ln [OPTION]... TARGET... DIRECTORY (3rd form) ln [OPTION]... -t DIRECTORY TARGET... (4th form) DESCRIPTION
In the 1st form, create a link to TARGET with the name LINK_NAME. In the 2nd form, create a link to TARGET in the current directory. In the 3rd and 4th forms, create links to each TARGET in DIRECTORY. Create hard links by default, symbolic links with --symbolic. By default, each destination (name of new link) should not already exist. When creating hard links, each TARGET must exist. Symbolic links can hold arbitrary text; if later resolved, a relative link is interpreted in relation to its parent directory. Mandatory arguments to long options are mandatory for short options too. --backup[=CONTROL] make a backup of each existing destination file -b like --backup but does not accept an argument -d, -F, --directory allow the superuser to attempt to hard link directories (note: will probably fail due to system restrictions, even for the supe- ruser) -f, --force remove existing destination files -i, --interactive prompt whether to remove destinations -L, --logical dereference TARGETs that are symbolic links -n, --no-dereference treat LINK_NAME as a normal file if it is a symbolic link to a directory -P, --physical make hard links directly to symbolic links -r, --relative create symbolic links relative to link location -s, --symbolic make symbolic links instead of hard links -S, --suffix=SUFFIX override the usual backup suffix -t, --target-directory=DIRECTORY specify the DIRECTORY in which to create the links -T, --no-target-directory treat LINK_NAME as a normal file always -v, --verbose print name of each linked file --help display this help and exit --version output version information and exit The backup suffix is '~', unless set with --suffix or SIMPLE_BACKUP_SUFFIX. The version control method may be selected via the --backup option or through the VERSION_CONTROL environment variable. Here are the values: none, off never make backups (even if --backup is given) numbered, t make numbered backups existing, nil numbered if numbered backups exist, simple otherwise simple, never always make simple backups Using -s ignores -L and -P. Otherwise, the last option specified controls behavior when a TARGET is a symbolic link, defaulting to -P. GNU coreutils online help: <http://www.gnu.org/software/coreutils/> Report ln translation bugs to <http://translationproject.org/team/> AUTHOR
Written by Mike Parker and David MacKenzie. COPYRIGHT
Copyright (C) 2013 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. SEE ALSO
link(2), symlink(2) The full documentation for ln is maintained as a Texinfo manual. If the info and ln programs are properly installed at your site, the com- mand info coreutils 'ln invocation' should give you access to the complete manual. GNU coreutils 8.22 June 2014 LN(1)
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