11-20-2011
Hi,
Try as below
tail -f filename |grep -n "Key word"
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Hi any SUN expert,
All the while I using HP-Unix. Now when i turned into SUN environment, I not sure how the command should look like in SUN sys.
HP: tail -n3 file.log (this is the command i normally use)
SUN: tail (this 1 not work, donno where went wrong)
Please help, thanks! (3 Replies)
Discussion started by: clemeot
3 Replies
2. UNIX for Dummies Questions & Answers
Hi all
How can I make Emacs to show the line numbers at the left or right as a default. This might help me to quickly jump to a given line.
Thanks
SS (9 Replies)
Discussion started by: saurya_s
9 Replies
3. UNIX for Dummies Questions & Answers
I need to find to find duplicate lines in a document and then print the line numbers of the duplicates
The files contain multiple lines with about 100 numbers on each line I need something that will output the line numbers where duplicates were found ie 1=5=7, 2=34=76
Any suggestions would be... (5 Replies)
Discussion started by: stresslog
5 Replies
4. UNIX for Dummies Questions & Answers
Hi,
Just wonder if there is any quick way to display line number when monitoring a log file with tail -f? (4 Replies)
Discussion started by: iengca
4 Replies
5. Solaris
HI i have to copy the last 5000 lines form a log file and copy the same in the same file .overwriting the same log file.
ex: tail -5000 testfile1 > testfile2
cat testfile2
mv tesftfile2 testfile1
will produce the correct result.but i want to have this done in one line???? (4 Replies)
Discussion started by: saurabh84g
4 Replies
6. Shell Programming and Scripting
Hi,
I'm moniroting duplicate text with unix command (tail -f trace75747 | grep 'duplicate'), but it showed many lines then it stop show trace information although trace information in this file trace75747 always got.
What should I do?
I look forward to hearing from you.
THANKS! (10 Replies)
Discussion started by: seyha_moth
10 Replies
7. Shell Programming and Scripting
Hi,
I have a log file without date/time, and I want that everytime tail|grep find something it displays the date/time and the line. I have tried something like this command but without any luck to display the date/time:
tail -F catalina.out | sed "s/^/`date `/" | egrep ... (6 Replies)
Discussion started by: julugu
6 Replies
8. Shell Programming and Scripting
Hi ,
1)i want to display specific line number using tail command.
e.g. display 10 line from end.
Please help...
2)Want to display line 10 to 15 (from end)using tail command) (2 Replies)
Discussion started by: vivek1489
2 Replies
9. Homework & Coursework Questions
First month learning about the Linux terminal and it has been a challenge yet fun so far. We're learning by using a gameshell. I'm trying to display a certain line ( only allowed 1 command ) from a file only using the head or tail. I'm pretty about this answer:
head -23 history.txt | tail -1... (1 Reply)
Discussion started by: forzatekk
1 Replies
10. UNIX for Beginners Questions & Answers
Hi
I wanted to know if there is an option in grep command to show the number of results (not the number of lines of findings).
Thanks (14 Replies)
Discussion started by: abdossamad2003
14 Replies
TAIL(1) BSD General Commands Manual TAIL(1)
NAME
tail -- display the last part of a file
SYNOPSIS
tail [-f | -F | -r] [-b number | -c number | -n number] [file ...]
DESCRIPTION
The tail utility displays the contents of file or, by default, its standard input, to the standard output.
The display begins at a byte, line or 512-byte block location in the input. Numbers having a leading plus (``+'') sign are relative to the
beginning of the input, for example, ``-c +2'' starts the display at the second byte of the input. Numbers having a leading minus (``-'')
sign or no explicit sign are relative to the end of the input, for example, ``-n 2'' displays the last two lines of the input. The default
starting location is ``-n 10'', or the last 10 lines of the input.
The options are as follows:
-b number
The location is number 512-byte blocks.
-c number
The location is number bytes.
-f The -f option causes tail to not stop when end of file is reached, but rather to wait for additional data to be appended to the
input. The -f option is ignored if the standard input is a pipe, but not if it is a FIFO.
-F The -F option is the same as the -f option, except that every five seconds tail will check to see if the file named on the command
line has been shortened or moved (it is considered moved if the inode or device number changes) and, if so, it will close the current
file, open the filename given, print out the entire contents, and continue to wait for more data to be appended. This option is used
to follow log files though rotation by newsyslog(8) or similar programs.
-n number
The location is number lines.
-r The -r option causes the input to be displayed in reverse order, by line. Additionally, this option changes the meaning of the -b,
-c and -n options. When the -r option is specified, these options specify the number of bytes, lines or 512-byte blocks to display,
instead of the bytes, lines or blocks from the beginning or end of the input from which to begin the display. The default for the -r
option is to display all of the input.
If more than a single file is specified, each file is preceded by a header consisting of the string ``==> XXX <=='' where ``XXX'' is the name
of the file.
The tail utility exits 0 on success, and >0 if an error occurs.
SEE ALSO
cat(1), head(1), sed(1)
STANDARDS
The tail utility is expected to be a superset of the IEEE Std 1003.2-1992 (``POSIX.2'') specification. In particular, the -b, -r and -F
options are extensions to that standard.
The historic command line syntax of tail is supported by this implementation. The only difference between this implementation and historic
versions of tail, once the command line syntax translation has been done, is that the -b, -c and -n options modify the -r option, i.e. ``-r
-c 4'' displays the last 4 characters of the last line of the input, while the historic tail (using the historic syntax ``-4cr'') would
ignore the -c option and display the last 4 lines of the input.
HISTORY
A tail command appeared in Version 7 AT&T UNIX.
BUGS
When using the -F option, tail will not detect a file truncation if, between the truncation and the next check of the file size, data written
to the file make it larger than the last known file size.
BSD
June 6, 1993 BSD