Output the last part of files.

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0
votes
3answers
69 views

Tail a file from ssh and mirror to a local file

To tail a file over ssh, I can use ssh -t remotebox "tail -f /var/log/remote.log" However, it is possible to sync the tail with a local file? So a file automatically mirror the update of the tail ...
0
votes
3answers
42 views

tail -f AND allow text input

I want to create a script that allows some interactivity by tail -f logfile from myService allows text to be entered and sent to myService What I could not solve yet is this two functions working ...
0
votes
2answers
185 views

Capture piped multiline grep output into a variable

I'm using Zabbix's zabbix_sender.sh script to push exception stack traces to my remote Zabbix monitoring server. zabbix_sender.sh requires a key and a value for any data that it sends. It can read ...
0
votes
0answers
35 views

Automatically reconnect ssh session for tailing remote file

I need a solution that basically tails a log file from a remote box... Works on Mac Restores itself whenever I have internet. (I frequently close and open the lid of my macbook) It could be a ...
2
votes
1answer
55 views

Any way that I can feed tshark a live capture written to a file without reading from the start?

I'm capturing traffic from a microtik router to my linux server and writing to a big file. I'm searching for a way to feed from the current file end forward since it is a several GB file and I can't ...
0
votes
1answer
60 views

tail command not updating output for debug files

I know that tail -f /var/log/messages will be keep updating on screen as the contents of file gets updated. But when I tried the same thing with a debug file system's file it is not working , any ...
1
vote
4answers
185 views

Tail -f on new files

Is there a way to do something like this: tail -f logs/ and make the stdout to be updated on every line added to each file already present in logs/ and to every file that will be created in logs/ ...
15
votes
2answers
591 views

Bash Prompt Below Output - Background Log Tail

I used to work for a company who had a customised shell for management of one of their products that was running on Linux and I'm looking to replicate a key feature of this shell. All the work was ...
3
votes
1answer
2k views

tail: inotify cannot be used, reverting to polling: Too many open files

tail: inotify cannot be used, reverting to polling: Too many open files I'm running apache and tomcat servers on Ubuntu (AWS ec2). Whenever I try to tail the catalina.out of tomcat I get too many ...
3
votes
4answers
138 views

Adding tail behaviour where enter adds blank lines to less

I love less, which I can use to follow logs with the +F flag (or the ShiftF hotkey), search forwards and backwards, and generally move freely through the document. But there is one thing missing in ...
1
vote
1answer
116 views

Can I tail an http resource?

Is there a way to tail a resource such as http://someserver.com/logs/server.log ? This is what I would do for a local file. tail -F /var/logs/somefile.log I would like something similar to that ...
0
votes
3answers
278 views

tail-pipe-awk script, fine on Centos but weird on Ubuntu

I wrote a script on CentOS and now I'm trying to run it on Ubuntu and it is behaving unexpectedly. Here's something like the script, which I run under bash: sudo tail -F ...
2
votes
0answers
131 views

How to get “tail -f” working on a file located on a Windows share

I'm using a Mac and I have mounted a Windows network disk in my file system using "Connect to Server" in the Finder. In the terminal when i do tail -f on a log file located on said network disk, tail ...
0
votes
2answers
352 views

How to TAIL & EGREP for a specified time range in a BASH script

The subject mostly says it all. I am in charge of a few web servers running Ubuntu 12.04 running Apache2 & I would like to setup APC. Now I understand APC can hit segmentation fault issues when ...
2
votes
3answers
90 views

Detect file update from modification time

Is there a way to see how often a file is being updated? I mean I need to see if the modification time of a file is updated in a dynamic way (same as tail shows if the file is updated in a dynamic ...
1
vote
1answer
900 views

PHP Script To Monitor Apache Access Log Files using TAIL [closed]

I wrote a PHP script to live monitor the apache access_log file. I am using the following commands; $path_to_tail = '/usr/bin/tail'; $path_to_access_file = '/var/log/httpd/access_log'; ...
1
vote
2answers
111 views

Grabbing the directory path in a message like “You have new mail in /var/spool/mail/root”

So I often get messages such as You have new mail in /var/spool/mail/root and end up typing/copy-pasting out: tail /var/spool/mail/root, which is a bit cumbersome. Is there a simple command that ...
0
votes
2answers
210 views

How to combine a real-time clock with tail -F

I always run tail -F to keep an eye on a log in a terminal window. The log has a UTC date at the beginning of each entry: [08-Jan-2013 16:24:22] Yo! When I glance at my log window I need to know ...
2
votes
3answers
842 views

How to watch for count of new lines in tail

I want to do something like this: watch tail -f | wc -l #=> 43 #=> 56 #=> 61 #=> 44 #=> ... It counts new lines of tail each second / Linux, CentOs To be more clear. I have got ...
0
votes
1answer
1k views

tail -f : `tail: logfile.log: file truncated`

I was watching a log file (logfile.log) with tail -f, and after a few minutes, the following message was written to the file: tail: logfile.log: file truncated I've never seen that before and I'm ...
2
votes
3answers
119 views

Search for a log pattern continuously

I am preparing a log watch dog but my concern is tailing always would blow up in some point. Thus, My concern is to monitor the log file always and if a pattern match occurs. Issue some commands on ...
2
votes
2answers
587 views

Countinuous processing of tail -f output [closed]

I have a file where numbers are continuously appended: 1 2 3 4 I want to calculate their mean, also continuously, i.e.: 1 1.5 2 2,5 I don't want to check file periodically, I want to it in the ...
0
votes
3answers
369 views

Live statistics from a log file

I've got nginx running as a load balancer in front of several web servers. I'd like to be able to see live statistics with response time (maybe a histogram of the last 10 seconds?) I think Varnish ...
-1
votes
1answer
243 views

Windows Small Business Server 2011 64 Bit - where to find tail [closed]

I am looking for a tail alternative which can be installed on a Windows Small Business Server 2011 64 Bit (from this old thread)? I tried mTail, LogViewer and both failed. Do you have any suggestion ...
3
votes
2answers
1k views

tail -f without the tail?

Is there a command in Solaris to read a file, and when it gets to the end to stream the way tail does? I need to read the file from the start, and it is a binary file. Information on Solaris and ...
0
votes
3answers
388 views

tool to analyse/grep log files

Is there any web based GUIs to analyse or in realtime filter/grep log files from apache? log files that are access logs or error logs or postfix logs etc. Edit: I don't mean traffic analysis. Much ...
1
vote
3answers
131 views

Saving the out of tail

The following does not work... tail -f /var/log/mysql/general.log | grep Connect > /home/myfile.txt If I remove the "-f" switch then I am able to save the output to a text file, but it does not ...
1
vote
2answers
254 views

find files and search for within tail

The following is working as expected. find /opt/ -name "somefile.out" -exec grep 'Connection refused' {} \; | more But if I want to search only in the tail of the found files, I can not add tail or ...
2
votes
2answers
416 views

“tail -f” style web application

I've been searching for a small but functional PHP script or similar that I can expose via apache. Basically I'd like what "tail -f /var/log/something" does, but visible via a web browser. I'm finding ...
21
votes
4answers
4k views

In tail -f, how do I filter out stuff that has certain keywords?

I want to tail -f my logs. However, I want to filter out everything that has the words: "ELB", "Pingdom", "Health"
0
votes
3answers
474 views

how to “batch” output of “tail -F” or output all data in a stream every X seconds?

I am trying to monitor a log file in real-time. Say I issue a command such as: tail -F mysystem.log|grep -i error|mail ... This is supposed to monitor my log file, every time it sees an error, email ...
0
votes
4answers
2k views

Linux: Can I monitor all http connections to my site live? like tail -f /file/log.log only for http connections?

I want to monitor whether or not people are accessing my site live. I want to see the http connections made to my site in terminal/ssh. Something like a tail -f /file/log.log function but I believe ...
2
votes
3answers
133 views

issues to inspect a long text file in unix

If I run sudo pico /var/log/lighttpd/website/error.log I get a very long file, and I cannot see last lines. If I run: sudo tail -f /var/log/lighttpd/website/error.log | awk '{print $1 "--" $2}' ...
0
votes
1answer
576 views

NFS server and delay in using tail -f?

We have two Solaris servers, let's call them Alice and Bob. We also have a Solaris NFS server used by both of them, call it Charlie. Alice writes to a text logfile on the NFS server, which is then ...
7
votes
4answers
2k views

Is is possible to filter the output of tail?

I'd like to tail a file but only output lines that have a certain string in them. Is this possible?
1
vote
4answers
1k views

`tail -f` sometimes stops updating - and the file hasn't moved

I have noticed recently that sometimes tail -f <logfile> will stop updating to the screen. Doing a Ctrl>-C and restarting the tail works fine, though. And I checked to make sure the logfile ...
1
vote
0answers
316 views

multitail/ssh leaves processes hanging around after exit

I'm using multitail via SSH to filter log output on a number of servers like so: multitail -L "ssh foo.bar.com tail -n 0 -q -F /var/log/out.log | grep match" This works great, however when ...
0
votes
1answer
84 views

Seeking past end of file causes Apache hang, and it never restarts

I've actually solved my problem with a better script, but I'm still left wondering why Apache2 hung completely - this is an out-of-the-box ISPCONFIG 3.03 install, everything bang up to date, running ...
1
vote
2answers
806 views

Best tools for “ssh tail -f” style log file monitoring and analysis

I'm looking for a tool to monitor custom PHP Error logs/Apache and possibly Java logs on remote development servers. I'm not looking for a full production log system like Splunk, but something that's ...
1
vote
3answers
1k views

tail -f and then exit on matching string

I am trying to configure a startup script which will startup tomcat, monitor the catalina.out for the string "Server startup", and then run another process. I have been trying various combinations of ...
4
votes
3answers
1k views

Can putty beep when tailing a log file?

I have a putty session tailing a log. I either keep flipping to it to see in anything has come up or I forget to check it at all. Can putty or tail be made to "beep" if anything scrolls into the ...
1
vote
4answers
107 views

Count amount of new lines with interval in log

Is there a way/tool to tail or watch a logfile and report the amount of lines it grows? E.g. I want to see the amount of new entries in mysql.log every 3 seconds. watch wc -l /path/to/log.log1 ...
2
votes
1answer
298 views

Multitail configuration:defaultcscheme isn't applied

Finally i got Multitail to work. The only problem is the Default Colorscheme isn't applied to a file i open with multitail, so have to go to the menu and apply it manually. My multitail.conf looks ...
3
votes
4answers
617 views

Searching for a tail tool for Linux to colorize and suppress lines by regx?

Is there any tool that does both, colorize and filtering lines to suppress form output by regex?
5
votes
6answers
4k views

Colour tail of Apache logs

Monitoring apache logs with tail –f tends gets very frustrating for the eyes after a while. Are there any tool/options to colorize the log outputs? Maybe signal FATAL with red, etc...
6
votes
2answers
977 views

Tail server logs into XMPP?

So I have two files, and if a new line appears on either of these files, I'd like to receive an IM (preferably jabber or gTalk) containing the contents of that line. Do you guys have any suggestions ...
2
votes
2answers
262 views

Bash edit file and keep last 500 lines

I am looking to create a cron job that opens a directory loops through all the logs i have created and deletes all lines but keep the last 500 for example. I was thinking of something along the lines ...
20
votes
5answers
40k views

How to display certain lines from a text file in Linux?

I guess everyone knows the useful Linux cmd line utilities head and tail. Head allows you to print the first X lines of a file, tail does the same but prints the end of the file. What is a good ...
3
votes
4answers
1k views

“watching” a log on FreeBSD vs Linux

On Linux systems I can watch -n1 tail /var/log/whatever.log or watch -n1 grep somestuff /var/log/whatever.log To show updates to a log every 1 seconds. On FreeBSD however, the watch command does ...
4
votes
5answers
1k views

Is there a `tail -f` equivalent for when a file is overwritten (instead of appended to)?

How do continuously monitor a file that is being continuously overwritten? Specifically, the file contains a single line of text which a background process is repeatedly opening and re-writing. I ...