Regex Question Post: 302821771

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regex question

hi, i got a problem with understanding regular expressions. what i wanna do is scanning the wtmp logfile for ips and if a specific ip is echoed id like to be a part of a text to be assigned to it. the scanning is done with #! /bin/bash cat wtmp | strings | egrep -o "+\.+\.+\." | sort -u...

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regex question

I have a simple file test.out that contains data in the form of key1=A|shift1 key2=B|shift2 key3=C|shift3 and so on. I need to get it to print A B C I can do it using lookbehind assertion such as this ( ?<==)() yet I was wondering if there is another way of mutching single...

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regex question

Hi I have a question on regex There is a line in a script like my_file="$(echo SunMonTueWed | sed "s//_&g") " My question what does the expression _&g do. Obviously in this example the output is _Sun_Mon_Tue_Wed Another question can i use some trick to get the result like...

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regex question

Hi, im sure this is really simple but i cant quite figure it out. how do i test against a word at the beginning of the line but up to the point of a delimiter i.e. ":" for example if i wanted to test against the user in the /etc/passwd file peter:x:101:100:peters account:/var/peter:/bin/sh ...

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Question on regex with * and .

I have a basic question regarding * and . while using regex: # echo 3 | grep ^*$ 3 I think I understood why it outputs "3" here (because '*' matches zero or more of the previous character) but I don't understand the output of the following command: # echo 3 | grep ^.$ # I thought I...

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I have dates in mm/dd/yy format that I wish to convert to yy-mm-dd format. ()/()/() finds them, but when I try to replace with $3-$1-$2 both kate and kwrite treat it as a text literal.

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RegEX question

Hi, I am trying to write a regex for myscript and need some input from experts. here is what I must grep for TICKET{Sapce}{Space}{hyphen} so here is the example data TICKET 34554, CT-12345, TICKET 12345: some text here TICKET 2342, CT-12345, MA-12344: some text here TICKET...

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regex question

Hi guys, I have a file in the following format: cmpr5551 cmpr6002 cmpr93 anne 5454 bbro 434 cmprsvc cmprsvc7 ffgi55 vefe99 cmprsvc8 cmprsvc9 I need to "grep" only the entries which start with "cmpr" followed by the number. All other entries should be excluded. I was trying to use...

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regex question

Hi guys, I am trying to "grep" or "egrep" the following entry out of the file using regex: MACCDB1 or MACCDB2 The problem is that the file might contain other entries which start with "MACCDB" string. I was trying to use regex to "grep" the exact pattern but it fails to output the correct...

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Regex question

I want to match all occurrence of 01,03,05,07,10,11 at 9th and 10th position of a string . I tried the following but its also matching characters like 33 or 11 on 9th and 10th position . sed "/^\{8\}00/d" A.TXT 000000001000 433483433339 <<< wrong 121121211100 <<< wrong 167710000110...

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fmt

fmt(1)							      General Commands Manual							    fmt(1)

NAME

       fmt - format text

SYNOPSIS

       width] [file...]

DESCRIPTION

       The  command is a simple text formatter that fills and joins lines to produce output lines of (up to) the number of characters specified in
       the width option.  The default width is 72.  concatenates the arguments.  If none are given, formats text from the standard input.

       Blank lines are preserved in the output, as is the spacing between words.  does not fill lines beginning with a	period	for  compatibility
       with Nor does it fill lines starting with

       Indentation is preserved in the output and input lines with differing indentation are not joined (unless is used).

       can also be used as an in-line text filter for the command:

       reformats the text between the cursor location and the end of the paragraph.

   Options
       recognizes the following options:

	      Crown margin mode.
		    Preserve the indentation of the first two lines within a paragraph and align the left margin of each subsequent line with that
		    of the second line.  This is useful for tagged paragraphs.

	      Split lines only.
		    Do not join short lines to form longer ones.  This prevents sample lines of code, and other such "formatted" text, from  being
		    unduly combined.

	      Fill output lines to up to
		    width columns.

WARNINGS

       The width option is acceptable for BSD compatibility, but it may go away in future releases.

SEE ALSO

       nroff(1), vi(1).

																	    fmt(1)

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fmt