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How to append date to filename, but base it on yesterday's date?

 
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Old 09-19-2013
[Solved] How to append date to filename, but base it on yesterday's date?
Hello,

I'd like to write a monthly archive script that archives some logs. But I'd like to do it based on yesterday's date. In other words, I'd like to schedule the script to run on the 1st day of each month, but have the archive filename include the previous month instead.

Here's what I have so far (this works for current day):
Code:
#!/bin/bash
cd /home/logs
tar cvzf /home/logs/logarchives_`date +%Y-%m\(%b\)`.tar.gz *.log

So the format ends up being: filename_2013-09(Sep).tar.gz
I'd like to be able to run a script on October 1st and have it say that.
And I'd like to run the same script on November 1st and have it end up with a filename_2013-10(Oct).tar.gz

Thanks!
Last edited by Don Cragun; 09-20-2013 at 08:31 PM..
 
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rearj

REARJ(1)							   Arj Software 							  REARJ(1)

NAME

       rearj - Converts other archive formats to .arj files

SYNOPSIS

       rearj [options] <!listfile(s)|filespec(s)|wildname(s)>

DESCRIPTION

       The rearj command can repackage other archive formats to arj.

OPTIONS

       -+     Ignore REARJ_SW variable.

       -a[suffix]
	      Convert archives within archives ("*" for all formats).

       -bcommand
	      Execute command before extracting files.

       -ccommand
	      Execute command on extracted files before counting them.

       -d     Delete original archives.

       -e     No error switch.

       -f     Convert diskette archives.

       -g     Skip creation of output archive.

       -i[name]
	      Check integrity of rearj program.

       -j     Skip if output archive size is larger than the original.

       -k     Skip archive timestamping.

       -l[name]
	      Write append log file (default name is rearj.log).

       -m[date]
	      Select archives before date in YYMMDDHHMMSS format.

       -n[date]
	      Select archives on or after date in YYMMDDHHMMSS format.

       -o     Allow overwrite of existing target archive.

       -p     Ignore long filenames under Windows 95.

       -q     Query for each archive to convert.

       -r     Recurse through subdirectories.

       -s     Skip verify of file count and total size.

       -tsuffix
	      Create suffix type archives.

       -u[bak]
	      Allow update of archive with backup (default is BAK).

       -v     Execute configured command on extracted files.

       -wdir  Assign work directory.

       -x[!]file
	      Exclude by filename, wildname, or listfile.

       -y[text]
	      Delete output archive and write text to log (testing mode).

       -z     Simulate operation.

ENVIRONMENT

       REARJ_SW If set, its value will be used as command line options.

EXIT STATUS

       0      Success.

       1      File not found.

       2      File is not a configured archive type.

       3      Target archive already exists.

       4      Not enough disk space.

       5      User skipped or user did not select update option.

       6      UNPACK command error.

       7      PACK command error.

       8      Target cannot support directories.

       9      Wrong file count.

       10     Wrong total size.

       11     Internal archive REARJ error.

       12     Rename archive error.

       13     Invoked -v command error (found a virus?).

       14     Output archive is larger.

EXAMPLE

       rearj * -r -d
	      Convert all archives to ARJ format, searching all subdirectories, deleting original archives.

SEE ALSO

       arj(1).

AUTHOR

       This  manual  page  was	written  by Ola Lundqvist <opal@debian.org> in pod format, then converted by Guillem Jover <guillem@debian.org> to
       nroff format.

3.10								    2003-03-10								  REARJ(1)