01-10-2006
Need some basic help
Hi everyone, I need some help! I know that this is a very simple little problem but I seem to be stuck. I was just wondering if you could show me the right way.
I basicly have to write a single line of commands (using piping) to do the following:
From the file data.txt, select all of the lines that
contain at least six consonants
and have five digits in the fifth column.
Sort these lines in reverse order according to column 3, then
select lines 65 through 87. Finally, put these lines in
normal order according to column 1 and write them to the file
output.txt (overwrite any data already in that file).
What I have right now (missing some things):
grep -i ^[^a,e,i,o,u] * [?????]* | sort -r | head -87 | tail -64 | sort > output.txt
any help would be great.
Thanks
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UNIQ(1) General Commands Manual UNIQ(1)
NAME
uniq - report repeated lines in a file
SYNOPSIS
uniq [ -udc [ +n ] [ -n ] ] [ input [ output ] ]
DESCRIPTION
Uniq reads the input file comparing adjacent lines. In the normal case, the second and succeeding copies of repeated lines are removed;
the remainder is written on the output file. Note that repeated lines must be adjacent in order to be found; see sort(1). If the -u flag
is used, just the lines that are not repeated in the original file are output. The -d option specifies that one copy of just the repeated
lines is to be written. The normal mode output is the union of the -u and -d mode outputs.
The -c option supersedes -u and -d and generates an output report in default style but with each line preceded by a count of the number of
times it occurred.
The n arguments specify skipping an initial portion of each line in the comparison:
-n The first n fields together with any blanks before each are ignored. A field is defined as a string of non-space, non-tab charac-
ters separated by tabs and spaces from its neighbors.
+n The first n characters are ignored. Fields are skipped before characters.
SEE ALSO
sort(1), comm(1)
7th Edition April 29, 1985 UNIQ(1)