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Full Discussion: Help with unix for loop
Top Forums UNIX for Dummies Questions & Answers Help with unix for loop Post 302534583 by itkamaraj on Tuesday 28th of June 2011 08:20:44 AM
Old 06-28-2011
Code:
input file contents ( line numbers for reference)
$ cat -n input.txt 
     1	I have a command that I want to translate to Unix. 
     2	I mostly work with Windows and because of that
     3	I am stuck on a part. 
     4	What I cannot find on the internet
     5	is skipping the first lines in a 
     6	for loop and using a certain word/token. (I know how to do a normal loop with output)
     7	I need to skip the first 7 lines
     8	as these are just text and I need to use the 5th token.
     9	Then I want to use the the first 
    10	3 letters from the output to sort b


output file

$ cat outtt.txt 
tex
use
out

script file

$ cat test.sh 
#!/bin/sh
i=0;
while read line
do
	echo $i;
	if [ "$i" -lt "7" ]
	then
		i=`echo "$i + 1" | bc` 
		continue;
	fi
	echo $line | awk '{print substr($5,0,3)}' >> outtt.txt
done < input.txt

 

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cat

CAT(1)									FSF								    CAT(1)

NAME

       cat - concatenate files and print on the standard output

SYNOPSIS

       cat [OPTION] [FILE]...

DESCRIPTION

       Concatenate FILE(s), or standard input, to standard output.

       -A, --show-all
	      equivalent to -vET

       -b, --number-nonblank
	      number nonblank output lines

       -e     equivalent to -vE

       -E, --show-ends
	      display $ at end of each line

       -n, --number
	      number all output lines

       -s, --squeeze-blank
	      never more than one single blank line

       -t     equivalent to -vT

       -T, --show-tabs
	      display TAB characters as ^I

       -u     (ignored)

       -v, --show-nonprinting
	      use ^ and M- notation, except for LFD and TAB

       --help display this help and exit

       --version
	      output version information and exit

       With no FILE, or when FILE is -, read standard input.

AUTHOR

       Written by Torbjorn Granlund and Richard M. Stallman.

REPORTING BUGS

       Report bugs to <bug-coreutils@gnu.org>.

COPYRIGHT

       Copyright (C) 2002 Free Software Foundation, Inc.
       This is free software; see the source for copying conditions.  There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU-
       LAR PURPOSE.

SEE ALSO

       The full documentation for cat is maintained as a Texinfo manual.  If the info and cat programs are properly installed at  your	site,  the
       command

	      info cat

       should give you access to the complete manual.

cat (coreutils) 4.5.3						   February 2003							    CAT(1)
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