sed one liner simialr to tail command Post: 302585488

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Awk/Sed One liner for text replacement

Hi group, I want to replace the occurance of a particular text in a paragraph.I tried with Sed,but Sed only displays the result on the screen.How can i update the changes in the original file??? The solution should be a one liner using awk and sed. Thanks in advance.

2. Shell Programming and Scripting

Issue with a sed one liner variant - sed 's/ ; /|/g' $TMP1 > $TMP

Execution of the following segment is giving the error - Script extract:- OUT=$DATADIR/sol_rsult_orphn.bcp TMP1=${OUT}_tmp1 TMP=${OUT}_tmp ( isql -w 400 $dbConnect_OPR <<EOF select convert(char(10), s.lead_id) +'|' + s.pho_loc_type, ";", s.sol_rsult_cmnt, ";", +'|'+ s.del_ind...

3. Shell Programming and Scripting

Sed one-liner to print specific lines?

I need to print specific lines from a file, say 2-5, 8, 12-15, 17, 19, 21-27. How do I achieve this?

4. Shell Programming and Scripting

Clarification needed for a SED one liner

I want to use SED to replace all new line characters of a file, I googled and found this one liner sed '{:q;N;s/\n//g;t q}' infile what do :q;N; and t q mean in this script?

5. Shell Programming and Scripting

SED | Awk flat file one liner

sed awk one liner

6. Shell Programming and Scripting

help with sed one liner

hey everyone, I want to remove some characters from a string that i have with sed. For example if my string is: a0=bus a1=car a2=truck I want my output to look like this: bus car truck So i want to delete the two characters before the = and including the =. This is what i came up with...

7. UNIX for Advanced & Expert Users

Please explain this sed one liner

Can anyone explain the below sed oneliner? sed -e ':a' -e '$q;N;11,$D;ba' It works same as tail command. I just want to know how it works. Thanks ---------- Post updated at 11:42 PM ---------- Previous update was at 11:37 PM ---------- Moderators, Can you please delete this thread?...

8. UNIX for Dummies Questions & Answers

sed one-liner

I have a data base of part numbers: AAA Thing1 BBB Thing2 CCC Thing3 File one is a list of part numbers: AAA234 BBB678 CCC2345 Is there a sed one-line that would compare a data base with and replace the part numbers so that the output looks like this? AAA234 Thing1 BBB678 Thing2...

9. UNIX for Dummies Questions & Answers

awk or sed one liner

I have a data base of part numbers: AAA Thing1 BBB Thing2 CCC Thing3 File one is a list of part numbers: XXXX AAA234 XXXX BBB678 XXXX CCC2345 Is there a sed one-line that would compare a data base with and replace the part numbers so that the output looks like this? XXXX AAA234...

10. Shell Programming and Scripting

sed one Liner option -e

Hi, I have the following command.(Delete all trailing blank lines at the end of a file.) sed -e :a -e '/^\n*$/{$d;N;ba' -e '}' I don't understand the logic of this command and also I don't understand why -e is used. Can you please let me know the logic of this command and why three -e...

LEARN ABOUT PLAN9

tail

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)