I have a log file for the year, which contains lines starting with the data in the format of YYYY-MM-DD. I need to get all the lines that contain the DD being 04, how would I do this? I tried using grep "*-*04" but it didn't work.
grep takes regular expressions, not globs, and in regular expressions, * means "zero or more of the previous character". So the first * did nothing, and the second * means "match any number of - characters". If you want to match zero or more of any character you can use the special "." character, like:
though I'd specify it a bit further so those *'s don't get out of control and try to match the entire line, like
I need to extract the date part from the file name (20080221 in this ex) and compare it with the current date and delete it, if it is a past date.
$file = exp_ABCD4_T-2584780_upto_20080221.dmp.Z
really appreciate any help.
thanks
mkneni (4 Replies)
Hi , I am having a script which will start a process and appends the process related logs to a log file. The log file writes logs with every line starting with date in the format of: date +"%Y %b %d %H:%M:%S".
So, in the script, before I start the process, I am storing the date as DATE=`date +"%Y... (5 Replies)
Hi again:
I have this file:
"2010-11-1 11:50:00",40894,13.38,17.24,12.92,13.23,"2010-11-14
11:43:02",12.56,"2010-11-14 11:46:02",22.68,20.95,"2010-11-14
11:44:03",2.144,2.078,190.4,14.27,6.293,"2010-11-14 ... (2 Replies)
You are given a 1 year logfile with each line starting with a date in the form “YYYY-MM-DD”. How would you extract logs from the 4th day of each month and put them into a new file (1 Reply)
Hi all,
Hope someone here will be able to help me. Our system has some scripts that are run from a cron job every ten mins and is used to see how many error there are in that time frame. Problem is that in the scripts grep is used to find the data, but as the day goes on these log file grow to a... (7 Replies)
Hi,
I am trying to extract lines of data within a log file on a Redhat 5 Linux system.
eg I need all the lines with a particular username over the last 3 minutes.
the log file may read like this, and I want a way to search all the lines extracting all the relevant lines over the last 3... (2 Replies)
I am running awk command to extract data from log file to calculate last 15 minutes log using below command and now i am getting bellow error:
awk '$0>=$from' from=$(`date -u +"####<%d-%b-%Y %H:%M:%S o'clock GMT>"-15min`) test.log
Error:
date: 0551-402 Invalid character in date/time... (8 Replies)
Hi
I have a daily rsync that runs and i am trying to find a easy way of extracting the start time and end time of the sync and extract the details of how much data was copied.
I would like to use this information to see if i can increase the amount of rsyncs that run in a day.
so the log... (3 Replies)
Hi,
I want to parse below file and Write a function to extract the logs between two given timestamp.
Apache (Unix) Log Samples - MonitorWare
The challenge here is there are three date and time format.
First :- 07/Mar/2004:16:05:49
Second :- Sun Mar 7 16:02:00 2004
Third :- 29-Mar... (6 Replies)
Discussion started by: sahil_shine
6 Replies
LEARN ABOUT ULTRIX
egrep
grep(1) General Commands Manual grep(1)Name
grep, egrep, fgrep - search file for regular expression
Syntax
grep [option...] expression [file...]
egrep [option...] [expression] [file...]
fgrep [option...] [strings] [file]
Description
Commands of the family search the input files (standard input default) for lines matching a pattern. Normally, each line found is copied
to the standard output.
The command patterns are limited regular expressions in the style of which uses a compact nondeterministic algorithm. The command patterns
are full regular expressions. The command uses a fast deterministic algorithm that sometimes needs exponential space. The command pat-
terns are fixed strings. The command is fast and compact.
In all cases the file name is shown if there is more than one input file. Take care when using the characters $ * [ ^ | ( ) and in the
expression because they are also meaningful to the Shell. It is safest to enclose the entire expression argument in single quotes ' '.
The command searches for lines that contain one of the (new line-separated) strings.
The command accepts extended regular expressions. In the following description `character' excludes new line:
A followed by a single character other than new line matches that character.
The character ^ matches the beginning of a line.
The character $ matches the end of a line.
A . (dot) matches any character.
A single character not otherwise endowed with special meaning matches that character.
A string enclosed in brackets [] matches any single character from the string. Ranges of ASCII character codes may be abbreviated
as in `a-z0-9'. A ] may occur only as the first character of the string. A literal - must be placed where it can't be mistaken as
a range indicator.
A regular expression followed by an * (asterisk) matches a sequence of 0 or more matches of the regular expression. A regular
expression followed by a + (plus) matches a sequence of 1 or more matches of the regular expression. A regular expression followed
by a ? (question mark) matches a sequence of 0 or 1 matches of the regular expression.
Two regular expressions concatenated match a match of the first followed by a match of the second.
Two regular expressions separated by | or new line match either a match for the first or a match for the second.
A regular expression enclosed in parentheses matches a match for the regular expression.
The order of precedence of operators at the same parenthesis level is the following: [], then *+?, then concatenation, then | and new
line.
Options-b Precedes each output line with its block number. This is sometimes useful in locating disk block numbers by context.
-c Produces count of matching lines only.
-e expression
Uses next argument as expression that begins with a minus (-).
-f file Takes regular expression (egrep) or string list (fgrep) from file.
-i Considers upper and lowercase letter identical in making comparisons and only).
-l Lists files with matching lines only once, separated by a new line.
-n Precedes each matching line with its line number.
-s Silent mode and nothing is printed (except error messages). This is useful for checking the error status (see DIAGNOSTICS).
-v Displays all lines that do not match specified expression.
-w Searches for an expression as for a word (as if surrounded by `<' and `>'). For further information, see only.
-x Prints exact lines matched in their entirety only).
Restrictions
Lines are limited to 256 characters; longer lines are truncated.
Diagnostics
Exit status is 0 if any matches are found, 1 if none, 2 for syntax errors or inaccessible files.
See Alsoex(1), sed(1), sh(1)grep(1)