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Full Discussion: Help with tail command
Top Forums Shell Programming and Scripting Help with tail command Post 302392585 by jagadish_gaddam on Thursday 4th of February 2010 10:56:13 PM
Old 02-04-2010
Java Help with tail command

Hi All,

My query seems to be silly but Iam unable to find where the exact problem lies.

I have a script to unzip set of files

here is the script

Code:
#!/bin/ksh
Count=`cat /home/gaddamja/Tempfile | wc -l`
while [ $count -ge 1 ]
do
Filename=`cat /home/gaddamja/Tempfile |tail -$Count | head -1`
cd /home/gaddamja/FilesDirectory
`gunzip $Filename`
echo " $Filename unzipped successfully"
$Count=`expr $count - 1`
done
echo "Unzipping completed"


from second line I am getting the count but in 5th line when i use 'Count' with tail its not working

it says
Code:
tail: cannot open input

could you pl suggeest me the right way to use it.

quick reply much appriciated!

Many thanks in advance

Last edited by pludi; 02-05-2010 at 02:17 AM.. Reason: code tags, please...
 

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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), 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
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. GZEXE(1)
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