Sponsored Content
Full Discussion: Read from last point
Top Forums Shell Programming and Scripting Read from last point Post 302976654 by Board27 on Saturday 2nd of July 2016 02:37:01 PM
Old 07-02-2016
Read from last point

Hi again,

first thanks for all your suggestions. This forum it is very useful.
I have a question. Is it possible to read from the last line a file was closed. For example, imagine that i've got a file with a LOT of timestamps :

Code:
1467387616.868717770
1467387616.874189609
1467387616.888759180
1467387616.894188020
1467387616.908742591
1467387616.914199431
(..)

and i need to read it in block of 70 lines each time, BUT since the file is updating quite fast i need to return to read it form the last (awk?) command without missing any line.

i don't know itf i render the idea or if it's possible. Maybe i need a program instead.

Thanks!
Kind Regards
 

10 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

Fibre connection Point to Point SUN

Anyone know of a guide or instructions for Solaris I got to configure a SBUS HBA to talk to a tape robot. I have done this on a switch but not point to point. just going HBA >>>>> TAPE Fibre simple two nodes Kie (6 Replies)
Discussion started by: kie
6 Replies

2. UNIX for Advanced & Expert Users

read() wont allow me to read files larger than 2 gig (on a 64bit)

Hi the following c-code utilizing the 'read()' man 2 read method cant read in files larger that 2gig. Hi I've found a strange problem on ubuntu64bit, that limits the data you are allowed to allocate on a 64bit platform using the c function 'read()' The following program wont allow to allocate... (14 Replies)
Discussion started by: monkeyking
14 Replies

3. Shell Programming and Scripting

Read Embedded Newline characters with read (builtin) in KSH93

Hi Guys, Happy New Year to you all! I have a requirement to read an embedded new-line using KSH's read builtin. Here is what I am trying to do: run_sql "select guestid, address, email from guest" | while read id addr email do ## Biz logic goes here done I can take care of any... (6 Replies)
Discussion started by: a_programmer
6 Replies

4. UNIX for Dummies Questions & Answers

When reading a csv file, counter to read 20 lines and wait for minute then read next 20 till end

Hello All, i am a newbie and need some help when reading a csv file in a bourne shell script. I want to read 10 lines, then wait for a minute and then do a reading of another 10 lines and so on in the same way. I want to do this till the end of file. Any inputs are appreciated ... (3 Replies)
Discussion started by: victor.s
3 Replies

5. Shell Programming and Scripting

Help with Bash piped while-read and a read user input at the same time

Hi I am new to writing script and want to use a Bash Piped while-read and read from user input. if something happens on server.log then do while loop or if something happend on user input then do while loop. Pseudocode something like: tail -n 3 -f server.log | while read serverline || read... (8 Replies)
Discussion started by: MyMorris
8 Replies

6. Shell Programming and Scripting

How to perform a hexdump using dd from start point to end point?

hi, I would like to ask or is it possible to dump a hex using dd from starting point to end point just like the "xxd -s 512 -l 512 <bin file>" I know the redirect hexdump -C but i can't figure it out the combination options of dd. Hope someone can share their knowledge.. Thanks in... (3 Replies)
Discussion started by: jao_madn
3 Replies

7. Linux

Make directory used as mount point read-only

For my backup , I mount and external hard disk to /mnt/mybackup and then I do an rsync to /mnt/mybackup If for some reason the rsync fails, I want to prevent it from writing data on the server hard disk itself since the external hard disk will no longer be mounted on it. I want /mnt/mybackup... (8 Replies)
Discussion started by: coolatt
8 Replies

8. Shell Programming and Scripting

[Bash] Read History function & Read Arrowkeys

Hi. How can I create a history function? (By "read" command or so) & How can I configure a read command so that the arrow keys are not displayed so funny? (^[[A) Thanks in advance. (4 Replies)
Discussion started by: sinnlosername
4 Replies

9. Shell Programming and Scripting

Read from last point

Hi again, first thanks for all your suggestions. This forum it is very useful. I have a question. Is it possible to read from the last line a file was closed. For example, imagine that i've got a file with a LOT of timestamps : 1467387616.868717770 1467387616.874189609... (1 Reply)
Discussion started by: Board27
1 Replies

10. UNIX for Beginners Questions & Answers

How to create a new mount point with 600GB and add 350 GBexisting mount point? IN AIX

How to create a new mount point with 600GB and add 350 GBexisting mount point Best if there step that i can follow or execute before i mount or add diskspace IN AIX Thanks (2 Replies)
Discussion started by: Thilagarajan
2 Replies
IRSEND(1)							   User Commands							 IRSEND(1)

NAME
irsend - basic LIRC program to send infra-red commands SYNOPSIS
irsend [options] DIRECTIVE REMOTE CODE [CODE...] DESCRIPTION
Asks the lircd daemon to send one or more CIR (Consumer Infra-Red) commands. This is intended for remote control of electronic devices such as TV boxes, HiFi sets, etc. DIRECTIVE can be: SEND_ONCE - send CODE [CODE ...] once SEND_START - start repeating CODE SEND_STOP - stop repeating CODE LIST - list configured remote items SET_TRANSMITTERS - set transmitters NUM [NUM ...] SIMULATE - simulate IR event REMOTE is the name of a remote, as described in the lircd configuration file. CODE is the name of a remote control key of REMOTE, as it appears in the lircd configuration file. NUM is the transmitter number of the hardware device. For the LIST DIRECTIVE, REMOTE and/or CODE can be empty: LIST "" "" - list all configured remote names LIST REMOTE "" - list all codes of REMOTE LIST REMOTE CODE - list only CODE of REMOTE The SIMULATE command only works if it has been explicitly enabled in lircd. -h --help display usage summary -v --version display version -d --device use given lircd socket [/var/run/lirc/lircd] -a --address=host[:port] connect to lircd at this address -# --count=n send command n times EXAMPLES
irsend LIST DenonTuner "" irsend SEND_ONCE DenonTuner PROG-SCAN irsend SEND_ONCE OnkyoAmpli VOL-UP VOL-UP VOL-UP VOL-UP irsend SEND_START OnkyoAmpli VOL-DOWN ; sleep 3 irsend SEND_STOP OnkyoAmpli VOL-DOWN irsend SET_TRANSMITTERS 1 irsend SET_TRANSMITTERS 1 3 4 irsend SIMULATE "0000000000000476 00 OK TECHNISAT_ST3004S" FILES
/etc/lirc/lircd.conf Default lircd configuration file. It should contain all the remotes, their infra-red codes and the corresponding timing and wave- form details. DIAGNOSTICS
If lircd is not running (or /var/run/lirc/lircd lacks write permissions) irsend aborts with the following diagnostics: "irsend: could not connect to socket" "irsend: Connection refused" (or "Permission denied"). SEE ALSO
The documentation for lirc is maintained as html pages. They are located under html/ in the documentation directory. lircd(8), mode2(1), smode2(1), xmode2(1), irrecord(1), irw(1), http://www.lirc.org. irsend 0.9.0-pre1 October 2010 IRSEND(1)
All times are GMT -4. The time now is 08:40 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy