Questions tagged [tail]
Tail is a command-line program that by default outputs the last ten lines to standard output; with other command switches, particular numbers of lines can be specified and files can be monitored in real time.
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How to display the last 10 lines that are added to a log file with `tail`?
I need to display the last 10 lines of a log file with tail. I currently us this command:
tail -n 10 -f /var/log/myapp/access.log
but it is not working as expected, as it doesn't follow new lines as ...
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How to get some lines before and after in log files using tail and grep? [duplicate]
How to get some lines before and after in log files using tail and grep ?
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How to tail multiple gz files
To tail multiple log files, I use:
tail /path/to/logs/*.log
To tail a zipped log file:
zcat /path/to/mylog.1.gz | tail
But I'd like to tail multiple zipped log files since the output of the ...
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How can I use bat command as an alternative to tail command?
I love the syntax highlighting of cat. So I want to use it as an alternative to tail command. But I cannot find a generic way to accomplish this. But I can use this command as an alternative to tail ...
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Tail in combination with sort
I use tail in a variable to echo contents of multiple files in a folder.
VAR="$(tail -n +1 DIR/*/file)"
This outputs all the files contents with the needed filename on top like
==> /...
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Cut last two lines of a file and append to another file repeatedly
I tried the following command to cut out the last two lines of a file and append them to a new file
tail -n -2 file1 >> file2 && head -n -2 file1 > tmp && mv tmp file1
With ...
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multitail regex not working
I am trying to use multitail to colorize some log files for a program I have written. I've created my own colorscheme within /etc/multitail.conf and I am able to colorize a very simple regex that ...
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How to open command on second tab in bash terminal [duplicate]
So I am writing a script and I want to export a log but open the tail command in another tab.
So far this is what I have come up with in BASH.
./configure &> log.configure.txt && gnome-...
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terminal, tail, check 2 logs separated, with grep (or some option)
need check 2 logs in one window. I know there is multitail, but how can I use this with some pipe (grep or some filtering for example)?
Example.
multitail A.log (B.log | grep 193.85.23.66)
Thank you.
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How to listen a result from a command using tail?
I would like to perform this command:
tail -f | tac myfile.txt
tac reverts the order of the lines, the command works fine, except for the "listen" part.
When the file is updated, the tail ...
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head and tail command output together on file
Suppose I am having file named file1.txt with the content as 1,2,3.. upto 100 linewise.
$> head -n 5 file1.txt //will display first 5 lines i.e. 1,2,3,4,5
$> tail -n 5 file1.txt // will display ...
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Feeding output of nvidia-smi to tail command returns error
I have a custom nvidia-smi message where some additional information (e.g., username) is also output underneath the original output of the nvidia-smi message.
I want to feed that output to a tail ...
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Copy last line of a local file onto a file on a remote server
I hope the title makes sense.
I am trying to copy the last line of a file onto a file with same name on a remote server.
For example: copy last line of server1:/opt/users.txt to server2:/opt/users....
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command history
Which is the most correct answer for this question: Write a one-line command that searches the last 50 commands that have been used for the term "find", and saves the result in history.txt
...
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How to tail a file with a randomized name?
I have a log file that I'd like to tail -f. I know which directory the file is in and the name of the file, up to a point. But, I know that there will be a random 9 digits added to the end of the file ...
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Difference between head and tail
Why is there a difference between the meaning of NUM in head -c and tail -c?
I will clarify what I mean with the following commands:
$ echo "words" | tail -c +1
words
$ echo "words" | tail -c +2
...
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How to find a binary name with only the prefix?
Context: I have a bash script that generates a windows import library from a MinGW cross-compiled DLL. As part of the build process, it runs llvm-dlltool-6.0, because that happens to be the specific ...
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tail: not found on a Chroot Directory, how i enable it?
I'm really a noob on Ubuntu, I'm facing a simple problem that I don't find anywhere, I follow this tutorial to make an ssh jail directory
https://www.tecmint.com/restrict-ssh-user-to-directory-using-...
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'tail -F' behaving unexpectedly on truncated file
I'm trying to follow everything written to a log file in a terminal.
In terminal 1 i do:
tail --retry --follow=name /tmp/test_log
or alternatively:
tail -F /tmp/test_log
In terminal 2 i ...
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Tailing Apache Logs - What is the number after the IP address
I am tailing the Apache error logs on my VPS so I can watch the traffic go by. I have been under a DOS attack, or a heavy port scan. I have the apache logging level set to LogLevel Warn. What does the ...
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Monitor log file event it was deleted and created again
I do file monitor with help of command:
tail -f foo.csv
After logging program restart file is deleted and created new one with the same name. But monitor window stops showing records of newly ...
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How to unzip only the first few lines of a zip archive?
I have a zipped text file a.zip I want to read the first 10 lines of it. Is it possible to do that without unzipping the whole file?
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Getting line number in tail -n
I want to get the lines starting from line number of the actual file and also get the actual line number in output as well.
I tried
tail +30 log.log | nl
but above one is giving the output line no....
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Start and terminate TAIL running via SSH using BASH
I am trying to monitor the changes of a file via SSH and copy the changes of it in local computer using BASH. I ran the following command to monitor and copy:
ssh [email protected] "tail -F /media/...
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monitor syslog and print line without `pattern`
I would like to monitor my /var/log/syslog continuously. However while monitoring, I would like to avoid certain pattern(s) while monitoring. I am interested only in the last 15 (for example) lines.
...
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What package is tail included with? [duplicate]
What package is tail (the command-line tool to see the end lines of a file) included with in the latest stable version of Ubuntu, if I want to install or uninstall it (and does it come installed by ...
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Ubuntu Service with tail not starting
I've managed to create my own service script, however it's having some problems starting. From the service I'm calling the following script in /usr/bin/myscript.sh:
#!/bin/bash
tail -f /path/to/error....
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Tail the last 5 lines, over-writing the last 5 displayed lines when more are added?
When using tail -f to display the last few lines of a file, how can I make it only ever display 5 lies, overwriting previous lines when the file is added to?
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Which is faster to delete first line in file... sed or tail?
In this answer (How can I remove the first line of a file with sed?) there are two ways to delete the first record in a file:
sed '1d' $file >> headerless.txt
** ---------------- OR ----------...
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How to extract files using the dd command?
I'm trying to extract a squashfs file from a .bin
What I did so far:
I used binwalk to locate the pointers: binwalk data.bin
DECIMAL HEXADECIMAL DESCRIPTION
-----------------------------...
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Tail - like tool for log files [duplicate]
I want a tool that offers tail-like functionality for large files. (which are in a remote server and mounted on my system, for what that matters).
I am aware of glogg but I am having issues with auto ...
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Move only the last 8 files in a directory to another directory
I'm trying to move the last 8 files from the Documents directory to another directory, but I don't want to move them one-by-one to that specific directory. Is it possible to move them with a ...
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Running tasks in remote server via SSH - life cycle?
Two related questions:
If I ssh into a remote server and start a long running task in the foreground (:~$ ./my-task > out.log), will the process continue to run when my connection to the server ...
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Ending a tail -f on log files
I have to kill the tail -f process after using it to tail log files.
Is there a way to end the process within the tail -f display of the logfile?
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tail -f grep for one paragraph
I have a flowing log file that is separated by empty lines. It's difficult to tail it with grep 'PID' - when I do that it shows only 1 line.
This is the Sample:
[7/12/16 17:00:12:206 WIB] ...
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User limit of inotify watches reached on Ubuntu 16.04
I just installed Ubuntu 16.04 and I get this warning when I start SmartGit:
IOException: User limit of inotify watches reached
Moreover I get this warning launching tail -f:
tail: inotify resources ...
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Zombie being made from 'tail -f' cron job that grep's and launches shell script
I realize that a single zombie process like this is nothing to worry about, I just want a more professional outcome (no zombie) from my code.
My cron job calling a shell script produces a single ...
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`tail` and append in oneliner
How could I tail and append a text in a file, in one line, in Bash?
My failed attempt would be
tail file.txt > file.txt && date >> file.txt
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Have bash script run against a live file - Is it possible?
I have a script I've written and (finally) have it working like I want it to, as long as I run it against a static file. Is there a way to tail a live file and have the script perform its actions ...
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Is there a maximum amount of time that tail -f can reliably run?
I have noticed that when I tail -f various log files (specifically Apache access/error logs), that it ceases to actively scroll output after a certain of number of hours.
I am uncertain if this is a ...
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Command substitution using grep'ed and sed'ed tail -f output as argument source into 'at' command
This is for a home surveillance system, headless server running Ubuntu 15.04, and I want its security to be exemplary. I envision a command line solution (with optional script, if absolutely necessary)...
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Why redirection to a while loop doesn't print the messages?
Here is a shell code used to track changes in a file and output the content to the terminal:
while read LINE
do
echo $LINE
done < `tail -f /var/log/messages`
It doesn't work, why?
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How do you get those nifty transparent log displays?
So I've seen plenty of displays of transparent logs or running logs or htop instances on what appear to be fixed areas of a desktop. I think this is something like root-tail but I can't get root-tail ...
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Why won't `tail -f` follow my syslog when running live?
I want to monitor /var/log/syslog for any changes in realtime (or within-a-few-seconds-of-time), but tail -f won't update with any new changes.
I'm running Ubuntu-based Linux Mint 17 XFCE live now, ...
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solaris tail on ubuntu
Is there a way to make linux tail understand the Solaris tail syntax (precisely like tail +2)? The short story is that I have some update scripts written for Solaris on the repo and I cannot modify ...
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Ending tail -f after print n lines
I have the following.
A Java process writing logs on file
A shell script starting
the Java process.
I need to read the log file after start Java process to check correct starting.
I have try with ...
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tail: Reading an entire file, and then following
I would like a tail -f type of behavior that reads the entire file and then continues to follow it as it's written to.
SOLUTION
Based on the answer I accepted, this works: tail -f -n +1 {filename}
...
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KDE, how to have "tail -f" constantly on a dedicated panel?
Plasma has this nice plasmoid called File Watcher.
At work I have 2 monitors. I would like to put this plasmoid on an empty panel on the second monitor. So that
tail -f /var/log/apache2/error.log
...
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'tail' command not getting only the new lines
I'm using the command:
tail -f -n 0 file.txt
But it keeps repeating itself.
What I'm doing is the following:
Create the file in the first terminal: touch file.txt
Start the tail in the second ...
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how to trace running a file?
I want to run a script (something.tcl) with a program (NS2-Network simulator )in Ubuntu 12.04. In order to run that program I have to write the below command:
NS something.tcl
when I type that ...
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