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Full Discussion: head & tail
Top Forums UNIX for Dummies Questions & Answers head & tail Post 57864 by svennie on Tuesday 9th of November 2004 06:40:33 AM
Old 11-09-2004
Question head & tail

I've a major file which includes other files and now I wanna 'cut' the file in several minor parts....like

....
find / -name "*.tmp" >filea
wc -l filea >fileb
sed -e '1s/ filea//' fileb >filec
AMOUNT=`cat filec`
if [ "$AMOUNT" = ??? ]; then
cat file a |head -100l (ell) |tail -100l >filec
cat file a |head -200l |tail -100l >filed
cat file a |head -300l |tail -100l >filee
....
fi

the number of the entries in filea are unknown. so getting them with wc, edit fileb, write the number in filec, make a variable AMOUNT.

now the problem is a loop. it should cut the first 100 (how making a loop like i+100?) , then the second 100, and so on and should stop if the filea is empty or when there is the EOF and the last part should have less then 100 entries.
also the files should be numbered or so....

thx for help...
 

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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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