My solution would be to scan the output twice -- so that I can identify which pattern is the last one. Something like this: ---------- Post updated at 11:30 AM ---------- Previous update was at 11:27 AM ----------
I want to search a file for a string and then if the string is found I need the line that the string is on - but also the previous two lines from the file (that the pattern will not be found in)
This is on solaris
Can you help? (2 Replies)
I have several huge files wich contains oracle table creation scripts as follows:
I would need to remove the pattern colored in red above. Any sed/awk/pearl code will be of much help.
Thanks (2 Replies)
hey all,
I need some help.
I have a text file with names in it.
My target is that if a particular pattern exists in that file more than once..then i want to rename all the occurences of that pattern by alternate patterns..
for e.g if i have PATTERN occuring 5 times then i want to... (3 Replies)
Hi,
Can anbody please let me know how i can retrieve lines above the line being searched in a file.
I am looking for an error message from a file, if I see that message I want the lines above that message along with this line.
how do we do this.
Please do let me know
An example which i have... (2 Replies)
Hi all.
I have a database log file in which log data get appended to it daily. I want to do a automatic maintainence of this log by going through the log and deleting lines belonging to a certain date.
How should i do it? Please help. Thanks.
Example. To delete all lines prior to Jun... (4 Replies)
hi!
i have a situation like this where i have to analyse the live log generated from
/bin/scp -v you@example.com
is if a pattern like say "Too many connections" comes i shud be able to identify it . (3 Replies)
I have an ugly conf file that has the string I'm interested in searching for in the middle of a block of code that's relevant, and I'm trying to find a way to remove that entire block based on the matched line.
I've googled for this problem, and most people helping are only interested in... (9 Replies)
Hi,
I have a requirement to to an ldapsearch and remove the shadow attributes in the output file.
What I do is ldapsearch() | operation to remove shadow > FILE
The ldapsearch gives output like this(with same line formation):
objectClass: FSConfig
objectClass: extensibleObject
fsCAIP:... (10 Replies)
Hi Everybody! First post! Totally noobie.
I'm using the terminal to read a poorly formatted book.
The text file contains, in the middle of paragraphs, hyphenation to split words that are supposed to be on multiple pages. It looks ve -- ry much like this.
I was hoping to use grep -v " -- "... (5 Replies)
GM,
I have an issue at work, which requires a simple solution. But, after multiple attempts, I have not been able to hit on the code needed.
I am assuming that sed, awk or even perl could do what I need.
I have an application that adds extra blank page feeds, for multiple reports, when... (7 Replies)
Discussion started by: jxfish2
7 Replies
LEARN ABOUT X11R4
tac
TAC(1) User Commands TAC(1)NAME
tac - concatenate and print files in reverse
SYNOPSIS
tac [OPTION]... [FILE]...
DESCRIPTION
Write each FILE to standard output, last line first.
With no FILE, or when FILE is -, read standard input.
Mandatory arguments to long options are mandatory for short options too.
-b, --before
attach the separator before instead of after
-r, --regex
interpret the separator as a regular expression
-s, --separator=STRING
use STRING as the separator instead of newline
--help display this help and exit
--version
output version information and exit
AUTHOR
Written by Jay Lepreau and David MacKenzie.
REPORTING BUGS
GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
Report tac translation bugs to <http://translationproject.org/team/>
COPYRIGHT
Copyright (C) 2017 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.
SEE ALSO rev(1)
Full documentation at: <http://www.gnu.org/software/coreutils/tac>
or available locally via: info '(coreutils) tac invocation'
GNU coreutils 8.28 January 2018 TAC(1)