I had this question... answered and very nice it was too. But, oddity has emerged whereby if the log file has a unique last line, (i.e. the first few words are different to the preceeding lines) it correctly returns that last line with tail -n 1 "file" but if the last few lines are similar to the the last line, it returns all the lines t...
I am writing a shell script to do a "tail" on a growing log file. This script accepts parameters to search for, and incrementally greps the output on them. For example, if the script is invoked as follows: logs.sh string1 string2 it should translate to: tail -f logs.txt | grep string1 | grep string2 I am building the list of grep ...
I want to make movement such as the tail command with PHP, but how may watch append to the file? ...
Hi, how to get the value of the last element of a List? I've noted that List.hd (or .Head) return an item, while List.tl (or .Tail) returns a List. Is rev the List and get the hd the only way around? Thanks. ...
Hi, this command is really very useful but where I can get the source code to see what is going on inside . thanks . ...
I want to output all lines between a and b in a file. This works but seems like overkill: head -n 900 file.txt | tail -n 100 My lack of unix knowledge seems to be the limit here. Any suggestions? ...
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 in the manner of "tail -f" that can "follow" a plain text file using only HTTP? ...
Hi, I am trying to implement a simple log server in Bash. It should take a file as a parameter and serve it on a port with netcat. ( tail -f $1 & ) | nc -l -p 9977 But the problem is that when the netcat terminates, tail is left behind running. (Clarification: If I don't fork the tail process it will continue to run forever even the ...
What is the pythonic way of watching the tail end of a growing file for the occurrence of certain keywords? In shell I might say: tail -f "$file" | grep "$string" | while read hit; do #stuff done ...
whats the best way to read a 1 GB file that gets time series data logged in it and generate a real time graph with two of its columns (one time and other a number)? I see that you have different ways of tailign the file. ...
Hi, I have a problem with a function that should only return the tail of a list. The functions is myTail and should give a useable result, even if the input is an empty list. I want to understand all 3 ways: pattern matching, guarded equation and conditional expressions this works: >myTail_pat :: [a] -> [a] >myTail_pat (x:xs) = xs >m...
I have a txt log file. How to make it look in Eclipse editor just as if it was the console output [ eg links underlined ]. It is a bit sad plugins called "Log viewer" do not highlight links as Console Window does. That's the worst thing about such plugins. ...
What I have is following . A java process writing logs to the stdout A shell script starting the java process Another shell script which executes the previous one and redirects the log I check the log file with tail -f command for success message. The problem is even if I have exit 0 in the code I cannot end the tail -f process....
I'm trying to figure out how to continuously read a file and once there is a new line added, output the line. I'm doing this using a sleep thread however it just seems to blow through the whole file and exit the program. Any suggestions what I'm doing wrong? Here is my code: import java.io.*; import java.lang.*; import java.util....
What is the fastest way to solve the following I will to join several lists based on common head or tail input = ([5,6,7], [1,2,3], [3,4,5], [8, 9]) output = [1, 2, 3, 4, 5, 6, 7] ...
I've got a bunch of binary files, each containing an embedded string near the end of the file but at different places (only occurs once in each file). I need to extract the part of the file starting at the location of the string till the end of the file and dump it into a new file. eg. If the file's contents is "AWREDEDEDEXXXERESSDSDS...
I found tail2win but it is a paid product. Are there any good freeware or shareware out there? ...
Hello, I need to print last 20 characters of string, but only whole words. Delimiter is a space "". Let's consider this example: string="The quick brown fox jumps over the lazy dog" echo $string | tail -c20 returns s over the lazy dog. And I need it to return over the lazy dog instead. Do you know how to accomplish that...
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_file.txt I will get an empty line. In my case I want to get bonjour. How do I do that? ...
Hi! I want to create a small code in C++ with the same functionality as "tail-f": watch for new lines in a text file and show them in the standard output. The idea is to have a thread that monitors the file Is there an easy way to do it without opening and closing the file each time? ...