1. Shell Programming and Scripting

Working in HP-UX 10.20. I eventually want to write a bourne shell script to handle the following problem, but for now I am just toying with it at the command line. Here's what I am basically trying to do: tail -f log_X | grep n > log_Y I am doing a tail -f on log_X . Once it sees "n", I... (6 Replies)

2. Shell Programming and Scripting

I am trying to extract a particular line from a.log which keeps appending every sec and output that into a newfile b.log which should append itself with filtered data received from a.log I tried tail -f a.log |grep fail| tee -a b.log nothing in b.log tail -f a.log |grep fail >>b.log ... (4 Replies)

3. Shell Programming and Scripting

Hi All, I notice that the below tail cannot be done. How can i modify this code such that i can always "tail" a variable number of lines ? set num = 100 cat filename|grep xxx| tail -$num (5 Replies)

4. Shell Programming and Scripting

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 (6 Replies)

5. Shell Programming and Scripting

Hi All, My query seems to be silly but Iam unable to find where the exact problem lies. I have a script to unzip set of files here is the script #!/bin/ksh Count=`cat /home/gaddamja/Tempfile | wc -l` while do Filename=`cat /home/gaddamja/Tempfile |tail -$Count | head -1` cd... (7 Replies)

6. UNIX for Dummies Questions & Answers

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... (3 Replies)

7. Shell Programming and Scripting

I have file that is being constantly written to example: file.txt ABC EBC ZZZ ABC I am trying to create a simple script that will tail this file and at the same time using tr to change B to F on lines containing 'B'. I tried this and it doesn't seem to work. #!/bin/bash tail -f... (8 Replies)

8. Shell Programming and Scripting

Hi, I want to write a script which will tail a particular file for 15 mins and then sleep for 10 mins and again tail for 15 mins. This cycle will go on for a limited period of time. How can i ensure that tail command will run for 15 mins before calling sleep command Thanks (6 Replies)

9. Shell Programming and Scripting

I have 250 files that have 16 columns each - all numbered as follows stat.1000, stat.1001, stat.1002, stat.1003....stat.1250. I would like to join all 250 of them together tail by tail as follows. For example stat.1000 a b c d e f stat.1001 g h i j k l So that my output... (2 Replies)

10. Shell Programming and Scripting

because the tail +2 on the first line gives me the file name pomga I do not want anything like what I miss tail +2 ejemplo.txt ouput ==> ejemplo.txt <== 1 2 3 4 5 6 7 8 9 10 (2 Replies)