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Full Discussion: monitoring a circular file
Top Forums Shell Programming and Scripting monitoring a circular file Post 302296676 by ShawnMilo on Wednesday 11th of March 2009 03:23:58 PM
Old 03-11-2009
Does this help?

Code:
 $ cat temp.txt | sort | tail
03/11/09 14:55:00 hahahaha <=== will be overwritten next
03/11/09 14:57:00 i c ded p'pl
03/11/09 14:59:00 l8terz <=== end of circular file (wrap over)
03/11/09 15:00:00 blablabla <=== beginning of circular file
03/11/09 15:01:00 yadayada
03/11/09 15:03:00 whatever! <=== latest update to circular file

You could run this with the 'watch' command if it's available on your system. How big does this file get?

Do this every 10 seconds:
Code:
watch -n 10 'cat temp.txt | sort | tail'

 

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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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