I have a few questions about Unix. Can you please help!
1.How do I create an alias that greps the password file for my username and returns my password file entry? Once I get the alias to work I want to be able to let a friend use it .So that he can use the alias to locate his password entry... (1 Reply)
I want to know if there is a way to send unix commands thru FTP from a mainframe to kick off Autosys Jobs. I just need to send a command from the mainframe to UNIX and have UNIX execute that command. (2 Replies)
friends i wanted to now whehter there exists a book as a solution to the questions posted in exercies of the Design of Unix Operating system by Maurice J Bach !..its really urgent !! (1 Reply)
hi guys...
am new 2 dis unix world...
am in need of a unix manual...
cud sum1 pls post sum links 2 download it?>?>? :confused:
Danks in advance... ;) ;) ;) (1 Reply)
I am able to run the UNIX commands in a Windows box from a UNIX box through "SSH" functionality. But whenever the SSH connection is established between UNIX and Windows, password for windows box is being asked.
Is there a way to avoid asking password whenever the SSH connection is made? Can I... (1 Reply)
Hi,
Solutions may be in ksh or bash
1. i have some files like.
CAT_CO00102_20100816190955.Z CAT_CO00102_20100816190955Q.Z CAT_CO00202_20100825135947A.Z
to find out files ends with A.Z or Q.Z i use following in ksh.
CAT="CAT*.Z"
ls $CAT
CAT_CO00102_20100816190955Q.Z ... (5 Replies)
Hi Folks,
I am used to writing scripts to get info by running commands at local zones level from their respective global zone by using zlogin <localzone> "command>" while remaining at the global zone level.
Can the same be done with Guest LDoms while remaining at the control LDOM level?
... (4 Replies)
Hi I want to read a text file and replace various number of spaces between each string in to a single "," or any other character .Please let me know the command to do so. My input file is a txt file which is the output of a SQL table extract so it contains so many spaces between each column of the... (2 Replies)
The 'env' command prints out all of the environment variables and their values.
Come up with a command that prints a list of environment variables whose names
end with either 'NAME', 'DIR' or 'PATH'.
What I've tried.
$ env | grep ''
Although it highlights the part of the variables... (8 Replies)
Discussion started by: edujs7
8 Replies
LEARN ABOUT CENTOS
wdmd
WDMD(8) System Manager's Manual WDMD(8)NAME
wdmd - watchdog multiplexing daemon
SYNOPSIS
wdmd [OPTIONS]
DESCRIPTION
This daemon opens /dev/watchdog and allows multiple independent sources to detmermine whether each KEEPALIVE is done. Every test interval
(10 seconds), the daemon tests each source. If any test fails, the KEEPALIVE is not done. In a standard configuration, the watchdog timer
will reset the system if no KEEPALIVE is done for 60 seconds ("fire timeout"). This means that if a single test fails 5-6 times in row,
the watchdog will fire and reset the system. With multiple test sources, fewer separate failures back to back can also cause a reset, e.g.
T seconds, P pass, F fail
T00: test1 P, test2 P, test3 P: KEEPALIVE done
T10: test1 F, test2 F, test3 P: KEEPALIVE skipped
T20: test1 F, test2 P, test3 P: KEEPALIVE skipped
T30: test1 P, test2 F, test3 P: KEEPALIVE skipped
T40: test1 P, test2 P, test3 F: KEEPALIVE skipped
T50: test1 F, test2 F, test3 P: KEEPALIVE skipped
T60: test1 P, test2 F, test3 P: KEEPALIVE skipped
T60: watchdog fires, system resets
(Depending on timings, the system may be reset sometime shortly before T60, and the tests at T60 would not be run.)
A crucial aspect to the design and function of wdmd is that if any single source does not pass tests for the fire timeout, the watchdog is
guaranteed to fire, regardless of whether other sources on the system have passed or failed. A spurious reset due to the combined effects
of multiple failing tests as shown above, is an accepted side effect.
The wdmd init script will load the softdog module if no other watchdog module has been loaded.
wdmd cannot be used on the system with any other program that needs to open /dev/watchdog, e.g. watchdog(8).
Test Source: clients
Using libwdmd, programs connect to wdmd via a unix socket, and send regular messages to wdmd to update an expiry time for their connection.
Every test interval, wdmd will check if the expiry time for a connection has been reached. If so, the test for that client fails.
Test Source: scripts
wdmd will run scripts from a designated directory every test interval. If a script exits with 0, the test is considered a success, other-
wise a failure. If a script does not exit by the end of the test interval, it is considered a failure.
OPTIONS --version, -V
Print version.
--help, -h
Print usage.
--dump, -d
Print debug information from the daemon.
--probe, -p
Print path of functional watchdog device. Exit code 0 indicates a
functional device was found. Exit code 1 indicates a functional device
was not found.
-D
Enable debugging to stderr and don't fork.
-H 0|1
Enable (1) or disable (0) high priority features such as realtime
scheduling priority and mlockall.
-G name
Group ownership for the socket.
-S 0|1
Enable (1) or disable (0) script tests.
-s path
Path to scripts dir.
-k num
Kill unfinished scripts after num seconds.
-w path
The path to the watchdog device to try first.
2011-08-01 WDMD(8)