tail Questions

6

Solved

For security reasons (I'm a developer) I do not have command line access to our Production servers where log files are written. I can, however access those log files over HTTP. Is there a utility i...
Anaemic asked 29/10, 2009 at 18:7

5

I currently use tail -f to monitor a log file: this way I get an autorefreshing console monitoring a web server. Now, said webserver was moved to another host and I have no shell privileges for th...
Gynarchy asked 8/7, 2015 at 13:6

4

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I'm using tail -f to print the content of a continuously changing file. When the file is truncated it shows up like this: blah (old).. blah more (old).. tail: file.out: file truncated blah.. blah ...
Refectory asked 8/10, 2012 at 16:9

4

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I want to run a few tasks in shell. tail a file into a new file: for example: tail -f debug|tee -a test.log at the same time, run other tasks. My question is: how to make the command tail -f d...
Demonism asked 15/7, 2011 at 3:9

6

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In Linux, using the command tailf, how can I tail several log files that are inside a folder and in the subfolders?
Felten asked 19/8, 2013 at 19:13

4

i want to tail log file with grep and sent it via mail like: tail -f /var/log/foo.log | grep error | mail -s subject [email protected] how can i do this?
Disulfide asked 11/1, 2011 at 11:3

6

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I want to display the last 10 lines of my log file, starting with the last line- like a normal log reader. I thought this would be a variation of the tail command, but I can't find this anywhere.
Vivianviviana asked 5/11, 2011 at 1:16

4

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I often find myself wanting to use Head and Tail methods on IEnumerables, which don't exist as part of Linq. While I could easily write my own I wonder whether they have been purposefully left out....
Frontal asked 25/10, 2013 at 8:56

5

I have a log file and want to create a webpage (possibly Python but not strictly) that will work much like unix "tail -f filename" command works (show new log lines when they are written to file). ...
Untune asked 2/11, 2010 at 13:54

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I'm writing a log file viewer for a web application and I want to paginate through the lines of the log file. The items in the file are line based with the newest item at the bottom. So I need a ta...
Bk asked 25/9, 2008 at 21:11

6

Is it possible to keep only the last 10 lines of a lines with a simple shell command? tail -n 10 test.log delivers the right result, but I don't know how to modify test.log itself. And tail -n ...
Mcgruder asked 23/9, 2010 at 4:3

6

I have a big file around 60GB. I need to get n middle lines of the file. I am using a command with head and tail like tail -m file |head -n >output.txt where m,n are numbers The general structu...
Phonologist asked 9/12, 2013 at 7:7

2

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I need to clarify that I am not looking to colorize the log output, and I am only interested in the program outputs that are written to syslog. So here is the scenario, I have a systemd unit servi...
Prophylaxis asked 17/10, 2018 at 19:25

10

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How can I read the first n lines and the last n lines of a file? For n=2, I read online that (head -n2 && tail -n2) would work, but it doesn't. $ cat x 1 2 3 4 5 $ cat x | (head -n2 &&a...
Tenebrous asked 19/2, 2015 at 20:10

5

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What is the efficient way to implement tail in *NIX? I came up (wrote) with two simple solution, both using kind of circular buffer to load lines into circular structure (array | doubly linked circ...
Saboteur asked 15/4, 2012 at 18:0

15

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I have to look at the last few lines of a large file (typical size is 500MB-2GB). I am looking for a equivalent of Unix command tail for Windows Powershell. A few alternatives available on are, ht...
Medulla asked 13/12, 2010 at 6:55

9

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For a DataFrame in Pandas, how can I select both the first 5 values and last 5 values? For example In [11]: df Out[11]: A B C 2012-11-29 0 0 0 2012-11-30 1 1 1 2012-12-01 2 2 2 2012-12-02 3 3 3 2...
Stylist asked 28/2, 2017 at 9:33

9

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Given a text file of unknown length, how can I read, for example all but the first 2 lines of the file? I know tail will give me the last N lines, but I don't know what N is ahead of time. So for ...
Anaesthetize asked 18/8, 2010 at 0:20

14

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I'd like to make the output of tail -F or something similar available to me in Python without blocking or locking. I've found some really old code to do that here, but I'm thinking there must be a ...
Madancy asked 21/9, 2012 at 1:13

4

On unix I can do a tail -f file And the equivalent powershell command is gc file -Wait However on unix I can press enter to add some blank lines (for readability) on the console while it is o...
Mcgean asked 5/2, 2015 at 7:56

9

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How do I get the last non-empty line using tail under Bash shell? For example, my_file.txt looks like this: hello hola bonjour (empty line) (empty line) Obviously, if I do tail -n 1 my_f...
Lining asked 14/4, 2010 at 15:52

4

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Found out how to access lambda logs from another answer Is it possible to tail them? (manually pressing refresh is cumbersome)
Seely asked 16/12, 2017 at 16:6

5

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kubectl logs -f pod shows all logs from the beginning and it becomes a problem when the log is huge and we have to wait for a few minutes to get the last log. Its become more worst when connecting ...
Nadeen asked 14/8, 2018 at 6:34

2

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In Bunyan logger we can see the log files like this: tail -f sample.log | bunyan and show the logs colorful and show json objects pretty, but I couldn't find some thinkg like that solution in Winst...
Counterplot asked 19/7, 2021 at 16:35

6

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I work with some log system which creates a log file every hour, like follows: SoftwareLog.2010-08-01-08 SoftwareLog.2010-08-01-09 SoftwareLog.2010-08-01-10 I'm trying to tail to follow the late...
Watercolor asked 5/8, 2010 at 15:42

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