Hi ,
I have found a interesting thing about tail command:
when I tried to use 'tail -1 *' to look at every file with the current derectory, I only got one line of result of one file.
But if I use 'head -1 *', I would get multiple lines.
Is there a way to do get multiple lines with 'tail -1 *'... (3 Replies)
I was wondering how can I do this
I have file myfile.txt
wc -l is: 5 000 000
I have to remove first 1 000 000 lines from header..
I tryed with tail -4000000 myfile.txt>newfile.txt
but it does not work...
any help?? (2 Replies)
I am new to UNIX......I have one file which contains thousnads of records with header and tailer.
Header
Record 1
Record 2
....
....
Last Record
Trailer
I want to concatenate Header and Trailer in the first line....now the output should look like this:
Header: Header value, Trailer:... (2 Replies)
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)
Hello Guys,
I have created function which is as follow:
tail -f filename |grep "Key word"
output from this command
19-11-2011 21:09:15,234 - INFO Numbement - error number:result = :11
19-11-2011 21:09:15,286 - INFO Numbement - error number:result = :11
19-11-2011 21:09:15,523 - INFO... (5 Replies)
Hi,
I want to read a live log file line by line and considering those line which are newly added to file
Below code I am using, which read line but as soon as it read new line from log file its starts processing from very first line of file.
tail -F /logs/COMMON-ERROR.log | while read... (11 Replies)
Hello,
I am trying to create an iptables script with tail ,sed and awk.
1st Request: Search keyword "secret" in access.log file
2nd Request: Get first column matching lines (ip address)
3rd Request: Save it to a file
This is what I did so far:
grep.sh
#!/bin/bash
while true;
do
tail... (23 Replies)
Hi Team,
Can anyone help me here:
I have to access server logs via putty and these logs file is a trailing file (continously updating) with ERROR and WARNINGS... I need to know if I can pull this trailing file to a local drive so that I can do some higlighting on some keywords through Notepad... (13 Replies)
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
LEARN ABOUT V7
rp
RP(4) Kernel Interfaces Manual RP(4)NAME
rp - RP-11/RP03 moving-head disk
DESCRIPTION
The files rp0 ... rp7 refer to sections of RP disk drive 0. The files rp8 ... rp15 refer to drive 1 etc. This allows a large disk to be
broken up into more manageable pieces.
The origin and size of the pseudo-disks on each drive are as follows:
disk start length
0 0 81000
1 0 5000
2 5000 2000
3 7000 74000
4-7 unassigned
Thus rp0 covers the whole drive, while rp1, rp2, rp3 can serve usefully as a root, swap, and mounted user file system respectively.
The rp files access the disk via the system's normal buffering mechanism and may be read and written without regard to physical disk
records. There is also a `raw' interface which provides for direct transmission between the disk and the user's read or write buffer. A
single read or write call results in exactly one I/O operation and therefore raw I/O is considerably more efficient when many words are
transmitted. The names of the raw RP files begin with rrp and end with a number which selects the same disk section as the corresponding
rp file.
In raw I/O the buffer must begin on a word boundary.
FILES
/dev/rp?, /dev/rrp?
SEE ALSO hp(4)BUGS
In raw I/O read and write(2) truncate file offsets to 512-byte block boundaries, and write scribbles on the tail of incomplete blocks.
Thus, in programs that are likely to access raw devices, read, write and lseek(2) should always deal in 512-byte multiples.
RP(4)