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Top Forums Shell Programming and Scripting Concatenate many files which contents the same date as part of name file Post 302734643 by Corona688 on Thursday 22nd of November 2012 01:10:55 PM
Old 11-22-2012
If you're running cat 9 times to read 9 files, you don't know what cat's for. You also don't need ls's help to use *. And don't need to use a temp file.


Code:
#!/bin/ksh

printf "%s\n" dsd*.txt | awk -F_ ' { print substr($2,1,6); }'  | sort | uniq |
while read file_dt
do
        mkdir -p dsd_${file_dt}
        cat dsd*${file_dt}.txt >> dsd_${file_dt}/dsd_${file_dt}.txt
done

exit 0

[edit] Slight changes to how the filenames are fed to awk.

Last edited by Corona688; 11-22-2012 at 02:16 PM..
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GZEXE(1)						      General Commands Manual							  GZEXE(1)

NAME
gzexe - compress executable files in place SYNOPSIS
gzexe [ name ... ] DESCRIPTION
The gzexe utility allows you to compress executables in place and have them automatically uncompress and execute when you run them (at a penalty in performance). For example if you execute ``gzexe /bin/cat'' it will create the following two files: -r-xr-xr-x 1 root bin 9644 Feb 11 11:16 /bin/cat -r-xr-xr-x 1 bin bin 24576 Nov 23 13:21 /bin/cat~ /bin/cat~ is the original file and /bin/cat is the self-uncompressing executable file. You can remove /bin/cat~ once you are sure that /bin/cat works properly. This utility is most useful on systems with very small disks. OPTIONS
-d Decompress the given executables instead of compressing them. SEE ALSO
gzip(1), gznew(1), gzmore(1), gzcmp(1), gzforce(1) CAVEATS
The compressed executable is a shell script. This may create some security holes. In particular, the compressed executable relies on the PATH environment variable to find gzip and some other utilities (tail, chmod, ln, sleep). BUGS
gzexe attempts to retain the original file attributes on the compressed executable, but you may have to fix them manually in some cases, using chmod or chown. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +--------------------+-----------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +--------------------+-----------------+ |Availability | SUNWgzip | +--------------------+-----------------+ |Interface Stability | Committed | +--------------------+-----------------+ NOTES
Source for gzip is available on http://opensolaris.org. GZEXE(1)
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