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Full Discussion: Can you perfect my sed ?
Top Forums UNIX for Dummies Questions & Answers Can you perfect my sed ? Post 302615477 by Corona688 on Thursday 29th of March 2012 01:43:55 PM
Old 03-29-2012
You need to use | to choose between two patterns. Put them inside brackets.


Code:
sed -n '/\([a-zA-Z]*\)\1\(e:\|o;\)/p'

If you have GNU sed, you can eliminate the hornets' nest of backslashes with -r.

Code:
sed -r -n '/([a-zA-Z]*)\1(e:|o;)/p'

 

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TAIL(1) 						      General Commands Manual							   TAIL(1)

NAME
tail - deliver the last part of a file SYNOPSIS
tail [ +-number[lbc][rf] ] [ file ] tail [ -fr ] [ -n nlines ] [ -c ncharacters ] [ file ] DESCRIPTION
Tail copies the named file to the standard output beginning at a designated place. If no file is named, the standard input is copied. Copying begins at position +number measured from the beginning, or -number from the end of the input. Number is counted in lines, 1K blocks or characters, according to the appended flag or Default is -10l (ten ell). The further flag causes tail to print lines from the end of the file in reverse order; (follow) causes tail, after printing to the end, to keep watch and print further data as it appears. The second syntax is that promulgated by POSIX, where the numbers rather than the options are signed. EXAMPLES
tail file Print the last 10 lines of a file. tail +0f file Print a file, and continue to watch data accumulate as it grows. sed 10q file Print the first 10 lines of a file. SOURCE
/sys/src/cmd/tail.c BUGS
Tails relative to the end of the file are treasured up in a buffer, and thus are limited in length. According to custom, option +number counts lines from 1, and counts blocks and characters from 0. TAIL(1)
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