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Top Forums Shell Programming and Scripting Need to understand the script pls help Post 302505996 by ctsgnb on Friday 18th of March 2011 07:19:26 AM
Old 03-18-2011
The last 8 lines could be replaced with a shorter
Code:
ls -rt ${uehist}/pwroutages.master.${fullyear}* | while read x
do
cat $x >>${uehist}/pwroutages.master_all.${fullyear} && rm -f $x
done

Mainly what it does is:

It takes all the files matching ${uehist}/pwroutages.master.${fullyear}* absolute names from the older to the newer (-rt = -reverse time),

and concatenate the content of each and every file into the file ${uehist}/pwroutages.master_all.${fullyear}

After every successfull concatenation, it deletes the corresponding ${uehist}/pwroutages.master.${fullyear}* file
 

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BZEXE(1)						      General Commands Manual							  BZEXE(1)

NAME
bzexe - compress executable files in place SYNOPSIS
bzexe [ name ... ] DESCRIPTION
The bzexe 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 ``bzexe /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
bzip2(1), znew(1), zmore(1), zcmp(1), zforce(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
bzexe 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. BZEXE(1)
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