Tail -f | grep > output.txt Post: 302928700

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Output from tail to a user

Hi all I've read through a few of these lists but can't find a right combination of answers (I can create VPN's but can't send an email!) Ok - I'm using taper as backup software which generates a log file called taper_log I want the last eight lines of this log file to be sent to a specified...

2. Shell Programming and Scripting

Sorting problem "sort -k 16,29 sample.txt > output.txt"

Hi all, Iam trying to sort the contents of the file based on the position of the file. Example: $cat sample.txt 0101020060731 ## Header record 1c1 Berger Awc ANP20070201301 4000.50 1c2 Bose W G ANP20070201609 6000.70 1c2 Andy CK ANP20070201230 28000.00...

3. UNIX for Dummies Questions & Answers

Help with tail /grep needed

Hello: I'm a very newbee at UNIX/AIX. What i want to do is to tail a file from the bottom until a certain string is found and write all the lines after the found string to another file. I've tried out a lot of combination with tail and grep but doesn't find the good one. Could someone help...

4. Shell Programming and Scripting

tail, grep and cut

Hello all, I have some weird problem that kinda baffles me. Say I have the following test file: claudia:~/tmp$ cat testfile.txt This is a test line This is the second test line And yeah, this is the third test line Then say I want to tail the file, grep for the word "third" then...

5. Shell Programming and Scripting

sed to read x.txt and grep from y.txt

How would I write a command(s) to read from a file (list) that looks like this: 29847374384 and grep from a second file (list) that looks like this: 29847374384, jkdfkjdf,3833,ddd:confused:

6. Shell Programming and Scripting

tail | grep

The program that is running on my machine generates log files. I want to be able to know the number of lines that contain "FT" in the most recent log file. I wrote the following, but it always returns zero. And I know the count is not zero. Any ideas? ls -rt *.log | tail -n 1 | grep -c FT

7. UNIX for Dummies Questions & Answers

Need help with a tail and a grep

I need to tail -f a file so I can monitor it as it is being written to. However, there is a lot of garbage in the file that I don't care about. So normally I would just pipe and grep for the string that is important to me. However, in this case, there are two things I need to grep for. I can't...

8. UNIX for Dummies Questions & Answers

mulitple grep using tail

I have a basic tail/grep question. I have logs that are generated & kept in a directory called alert_audit. I am using "tail" to see the logs that are coming in, but I only need logs that contain the IP address 10.249.185. or 10.247.231. Here is the command I have, but it pulls all IP...

9. Shell Programming and Scripting

Desired output.txt for reading txt file using awk?

Dear all, I have a huge txt file (DATA.txt) with the following content . From this txt file, I want the following output using some shell script. Any help is greatly appreciated. Greetings, emily DATA.txt (snippet of the huge text file) 407202849...

10. Shell Programming and Scripting

Trouble with tail and grep

Good Morning, i ran into some trouble this morning while 'improving' my monitoring stuff. i would like to get a warning when the number of mails sent (outbound) by postfix is above a certain number. so far, so easy. to test that i simply put cat /var/log/mail.info | grep 'to=<' | grep -v -e...

LEARN ABOUT DEBIAN

logtop

LOGTOP(1)						      General Commands Manual							 LOGTOP(1)

NAME

       logtop - Realtime log line rate analyser

SYNOPSIS

       logtop [OPTIONS]

DESCRIPTION

	logtop is a System Administrator tool analyzing line rate on stdin.
	It reads on stdin and print a constantly updated result
	displaying, in columns:
	Line number, count, frequency, and the actual line.

	 $ tail -f FILE | logtop
	is the friendly version of:
	 $ watch 'tail FILE | sort | uniq -c | sort -gr'

OPTIONS

       -s, --size=K
	      Only keep K lines in memory, instead of 10000.

       -q, --quiet
	      Do not display a live view of the data, only display a top at exit.

       -l, --line-by-line=K
	      Print result line by line, in a machine friendly format, K is the number of result to print per line.

		Line by line format is : [%d %f %s	]*

		  %d : Number of occurences
		  %f : Frequency of apparition
		  %s : String (Control chars replaced by dots.

       -i, --interval=K
	      Interval between graphical updates, in seconds. Defaults to 1.

       -h, --help
	      Show summary of options.

       -v, --version
	      Show version of program.

EXAMPLES

       Here are some logtop usage examples.

       tail -f cache.log | grep -o "HIT|MISS" | logtop

       Realtime hit / miss ratio on some caching software log file.

       tail -f access.log | cut -d' ' -f1 | logtop -s 10000

       Realtime most querying IPs on your server, as long as log lines in access.log starts with the client IP.

       tail -f access.log | cut -d' ' -f7 | logtop -s 10000

       Realtime most requested web pages in a NCSA like log file.

       cat auth.log | grep -v "CRON" | grep -o ": .*" | logtop -q -s 100000

       Display a one-shot simple analyse of your auth.log.

SEE ALSO

       watch(1)

AUTHOR

       logtop was written by Julien Palard.

       This manual page was written by Julien Palard <julien@palard.fr>, for the Debian project (and may be used by others).

								  April 16, 2011							 LOGTOP(1)

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Output from tail to a user

Discussion started by: ifan

2. Shell Programming and Scripting

Sorting problem "sort -k 16,29 sample.txt > output.txt"

Discussion started by: ganapati

3. UNIX for Dummies Questions & Answers

Help with tail /grep needed

Discussion started by: Felix2511

4. Shell Programming and Scripting

tail, grep and cut

Discussion started by: sylaan