01-29-2020
Are there any attempts or ideas from your side, some code you gave a shot ?
Regards
Peasant.
10 More Discussions You Might Find Interesting
1. AIX
hello
i have a requirement where i have a direcotry in which i get files in the format
STOCKS.20080114.dat
STOCKS.20080115.dat
STOCKS.20080117.dat
STOCKS.20080118.dat
i need to loop through the directory and sort by create date descending order and i need to process the first file.
... (1 Reply)
Discussion started by: dsdev_123
1 Replies
2. UNIX for Dummies Questions & Answers
Hi,
I need to sort all the files in a directory whilst retaining the originals. So if in the directory I have:
File1
File2
File3
I want to sort these files so that I would have:
File1
File1.sort
File2
File2.sort
File3
File3.sort
where I have added the .sort extension to show... (4 Replies)
Discussion started by: ledgie
4 Replies
3. UNIX for Dummies Questions & Answers
Hi all.
I have 2 files like this:
f1
A 10
B 80
C 9
f2
A 11
B 700
C 10
What I want is the concatenation of the two files sorted by name (alphabetically) and size (numerically), so the result should be like this:
F3 (cat f1 f2 sorted)
A 10
A 11
B 80
B 700 (2 Replies)
Discussion started by: mrodrig
2 Replies
4. Shell Programming and Scripting
hi there,
I have a directory which contents I can parse dynamically. I end up with a file list. I then want to display those files sorted by date, oldest files first. I have very very little PERL experience...Would anyone know how to do that ? Thanks in advance. (8 Replies)
Discussion started by: alexf
8 Replies
5. Shell Programming and Scripting
I got a long list of file name.
My input:
data_1.txt
data_2.txt
data_3.txt
data_10.txt
data_21.txt
data_12.txt
data_4.txt
My desired output:
data_1.txt
data_2.txt
data_3.txt
data_4.txt
data_10.txt
data_12.txt
data_21.txt
Does anybody got idea how to archive it? (11 Replies)
Discussion started by: patrick87
11 Replies
6. UNIX for Dummies Questions & Answers
Hi,
A basic query. In the example file below, I want to sort by column 1 and then by column 2 numerically. I have tried sort -k2n,1 file1 but while this sorts the columns in the correct order, it does not sort column 2 numerically. Any help would be much appreciated. Also, if you have time to... (3 Replies)
Discussion started by: auburn
3 Replies
7. Shell Programming and Scripting
Hello,
I have this sample data:
01 * * * *
01 * * * *
01 * * * *
01 * * * *
01 0 * * *
01 0 * * *
01 0 * * *
01 0 * * *
02 * * * 0
02 * * * 0
02 * * * 6
02 * * * 6
02 0 * * 1
02 0 * * 1
02 0 * * 2
02 0 * * 2
02 0 * * 3 (3 Replies)
Discussion started by: gio001
3 Replies
8. Shell Programming and Scripting
Greetings - I'm not necessarily new to bash scripting - I'm probably between beginner and intermediate, but I have something that I just cannot figure out after many attempts to find it. I have a file that is merely a list of many files, with their respective paths, and a branch path (ClearCase)... (5 Replies)
Discussion started by: 1cor29
5 Replies
9. UNIX for Dummies Questions & Answers
Hey Guys,
I am facing an annoying scenario, fewer times when I execute the sort command, it throws out on error saying that "No Space on available on /var/tmp/<temp file name>. May be it is set to /var/tmp directory. I was wondering, if I cant redirect the temporary file creation to any other... (3 Replies)
Discussion started by: abhisheksunkari
3 Replies
10. UNIX for Dummies Questions & Answers
Hello all,
I have a list of file names in a text document where each file name consists of 4 letters and 3 numbers (for example MACR119). There are 48 file names in the document (they are not in alphabetical or numerical order). I would like to reorder the list of names so that the 48th name is... (3 Replies)
Discussion started by: MDeBiasse
3 Replies
LEARN ABOUT FREEBSD
eventtimers
EVENTTIMERS(4) BSD Kernel Interfaces Manual EVENTTIMERS(4)
NAME
eventtimers -- kernel event timers subsystem
SYNOPSIS
Kernel uses several types of time-related devices, such as: real time clocks, time counters and event timers. Real time clocks responsible
for tracking real world time, mostly when system is down. Time counters are responsible for generation of monotonically increasing time-
stamps for precise uptime tracking purposes, when system is running. Event timers are responsible for generating interrupts at specified
time or periodically, to run different time-based events. This page is about the last.
DESCRIPTION
Kernel uses time-based events for many different purposes: scheduling, statistics, time keeping, profiling and many other things, based on
callout(9) mechanism. These purposes now grouped into three main callbacks:
hardclock() callout(9) and timekeeping events entry. Called with frequency defined by hz variable, usually 1000Hz.
statclock() statistics and scheduler events entry. Called with frequency about 128Hz.
profclock() profiler events entry. When enabled, called with frequency about 8KHz.
Different platforms provide different kinds of timer hardware. The goal of the event timers subsystem is to provide unified way to control
that hardware, and to use it, supplying kernel with all required time-based events.
Each driver implementing event timers, registers them at the subsystem. It is possible to see the list of present event timers, like this,
via kern.eventtimer sysctl:
kern.eventtimer.choice: HPET(550) LAPIC(400) i8254(100) RTC(0)
kern.eventtimer.et.LAPIC.flags: 15
kern.eventtimer.et.LAPIC.frequency: 0
kern.eventtimer.et.LAPIC.quality: 400
kern.eventtimer.et.i8254.flags: 1
kern.eventtimer.et.i8254.frequency: 1193182
kern.eventtimer.et.i8254.quality: 100
kern.eventtimer.et.RTC.flags: 17
kern.eventtimer.et.RTC.frequency: 32768
kern.eventtimer.et.RTC.quality: 0
kern.eventtimer.et.HPET.flags: 7
kern.eventtimer.et.HPET.frequency: 14318180
kern.eventtimer.et.HPET.quality: 550
where:
kern.eventtimer.et.X.flags is a bitmask, defining event timer capabilities:
1 periodic mode supported,
2 one-shot mode supported,
4 timer is per-CPU,
8 timer may stop when CPU goes to sleep state,
16 timer supports only power-of-2 divisors.
kern.eventtimer.et.X.frequency is a timer base frequency,
kern.eventtimer.et.X.quality is an integral value, defining how good is this timer, comparing to others.
Timers management code of the kernel chooses one timer from that list. Current choice can be read and affected via kern.eventtimer.timer
tunable/sysctl. Several other tunables/sysctls are affecting how exactly this timer is used:
kern.eventtimer.periodic allows to choose periodic and one-shot operation mode. In periodic mode, periodic interrupts from timer hardware
are taken as the only source of time for time events. One-shot mode instead uses currently selected time counter to precisely schedule all
needed events and programs event timer to generate interrupt exactly in specified time. Default value depends of chosen timer capabilities,
but one-shot mode is preferred, until other is forced by user or hardware.
kern.eventtimer.singlemul in periodic mode specifies how much times higher timer frequency should be, to not strictly alias hardclock() and
statclock() events. Default values are 1, 2 or 4, depending on configured HZ value.
kern.eventtimer.idletick makes each CPU to receive every timer interrupt independently of whether they busy or not. By default this options
is disabled. If chosen timer is per-CPU and runs in periodic mode, this option has no effect - all interrupts are always generating.
SEE ALSO
apic(4), atrtc(4), attimer(4), hpet(4), timecounters(4), eventtimers(9)
BSD
March 13, 2012 BSD