WD_IDENTIFY(8) System Manager's Manual WD_IDENTIFY(8)NAME
wd_identify - a simplified software watchdog daemon
SYNOPSIS
wd_identify [-c filename|--config-file filename]
DESCRIPTION
This utility opens /dev/watchdog and gets the identification string from the watchdog which then is printed. The device is closed after-
wards.
The wd_identify tool can only be used without causing a reboot if your kernel is compiled with the CONFIG_WATCHDOG_NOWAYOUT option enabled.
Watchdog and/or wd_keepalive may have to be stopped to make sure that wd_identify can access the watchdog device.
OPTIONS
Available command line options are the following:
-c config-file, --config-file config-file
Use config-file as the configuration file instead of the default /etc/watchdog.conf.
FILES
/dev/watchdog
The watchdog device.
SEE ALSO watchdog.conf(5)watchdog(8)4th Berkeley Distribution June 2010 WD_IDENTIFY(8)
Check Out this Related Man Page
WD_KEEPALIVE(8) System Manager's Manual WD_KEEPALIVE(8)NAME
wd_keepalive - a simplified software watchdog daemon
SYNOPSIS
wd_keepalive [-c filename|--config-file filename]
DESCRIPTION
This is a simplified version of the watchdog daemon. If configured so it only opens
.IR /dev/watchdog , and keeps writing to it often enough to keep the kernel from resetting, at least once per minute. Each write delays
the reboot time another minute. After a minute of inactivity the watchdog hardware will cause a reset. In the case of the software watchdog
the ability to reboot will depend on the state of the machines and interrupts.
The wd_keepalive daemon can be stopped without causing a reboot if the device /dev/watchdog is closed correctly, unless your kernel is com-
piled with the CONFIG_WATCHDOG_NOWAYOUT option enabled.
Under high system load wd_keepalive might be swapped out of memory and may fail to make it back in in time. Under these circumstances the
Linux kernel will reset the machine. To make sure you won't get unnecessary reboots make sure you have the variable realtime set to yes in
the configuration file watchdog.conf. This adds real time support to wd_keepalive: it will lock itself into memory and there should be no
problem even under the highest of loads.
On system running out of memory the kernel will try to free enough memory by killing process. The wd_keepalive daemon itself is exempted
from this so-called out-of-memory killer.
OPTIONS
Available command line options are the following:
-c config-file, --config-file config-file
Use config-file as the configuration file instead of the default /etc/watchdog.conf.
FILES
/dev/watchdog
The watchdog device.
/var/run/wd_keepalive.pid
The pid file of the running wd_keepalive.
SEE ALSO watchdog.conf(5)watchdog(8)4th Berkeley Distribution January 2005 WD_KEEPALIVE(8)
Hi everyone,
I know the following questions are noobish questions but I am asking them because I am confused about the basics of history behind UNIX and LINUX.
Ok onto business, my questions are-:
Was/Is UNIX ever an open source operating system ?
If UNIX was... (21 Replies)
Hello and thanks in advance for any help anyone can offer me
I'm trying to learn the find command and thought I was understanding it... Apparently I was wrong. I was doing compound searches and I started getting weird results with the -size test. I was trying to do a search on a 1G file owned by... (14 Replies)
hi all,
i have installed quota on my centos 7 machine and its what im after (setting size limit on users, so they cant fill the hard drive)
i want to now make this part of my create user script for my sftp server so i want to do a echo and a read command so i capture the limit they enter... (0 Replies)
Hi everybody,
Which Unix base OS have best performance for HOST virtualization?
I tested SmartOS but it needs another OS to connect remotely!
Thanks in advance. (11 Replies)
Hi All,
I need to write a shell script which opens a file and increments the version(text) within the file every time the script runs. For example:
$ cat docker_file.yml
version: '3.1'
services:
ui:
image: repo-srv.dev.io:5000/facebook/ui:0.0.2-QA1
$
So, I would like... (6 Replies)
Dear Team
We use DB2 v10.5 and using DBArtisan tool
Can someone please guide how to convert digits to binary numbers using db2 feature.
Ex> for number 9 , binary should be 1001 ( 8+1)
Any help appreciated. Thanks (2 Replies)
hi folks,
how to using tar with exclude directory and compress it using tar.Z
i only know how to exclude dir only with this command below:
tar -cvf /varios/restore/test.tar -X excludefile.txt /jfma/test1/
how to compress it using 1 command?
Thanx
Please use CODE tags as... (6 Replies)
Quite an obscure question I think.
We have a rebuild process for remote sites that allows us to PXE rebuild a till (actually a PC with a touch screen and various fancy bits) running CentOS. The current CentOS5 tills work just fine with a tar image restore and some personalisation. Sadly,... (4 Replies)
Hello All,
I had recently learnt a bit of Docker(which provides containerization process).
Here are some of my learning points from it.
Let us start first with very basic question:
What is Docker:
Docker is a platform for sysadmins and developers to DEPLOY, DEVELOP and RUN applications ... (7 Replies)
What is the point of this? Whenever I close my shell it appends to the history file without adding this. I have never seen it overwrite my history file.
# When the shell exits, append to the history file instead of overwriting it
shopt -s histappend (3 Replies)
Hello... And thanks in advance for any help anyone can offer me
I was trying to work out the differences between displaying modify, access, and change times with the 'ls' command. Everything seems in order when I look at files, but the access time on a directory doesn't seem to change when I... (4 Replies)
Hello everyone,
I am having an issue here with CentOS release 6.6 (Final) that shows all of the space used up, but I can't tell where the space went.
Seemingly I am using up 100%, according to
df -h
Filesystem Size Used Avail Use% Mounted on... (27 Replies)
I'm trying to use a bash script for a psych experiment that involves listening to sound files and responding. If I have something like the code below, how can I make sure that a key press is assigned to RESPONSE only after the second echo statement?
for i in 1 2 3; do
echo "Ready?"
sleep 2
... (10 Replies)
After the success of the jq - tool for parsing and manipulating JSON-Data someone wrote a tool called yq, which aims to be the same for YAML, what jq is for JSON. Seems to work fine. I'll definitely give it a chance in future.
Example YAML-File:
--- !ruby/object:Puppet::Node::Facts
... (1 Reply)
Dear All,
I am very pleased to announce that Dave Munro (gull04) is joining the Moderation Team, after being a very valuable member of UNIX.com for 15+ years.
Dave is an IT Consultant with 30 years of experience this year, has worked in many of the industry vertical market segments and has... (6 Replies)