Although I answered the question that was asked, I always do as methyl suggests for any remote commands beyond a simple "uptime" or "date".
I do sometimes type in loops or quick function definitions at the command line locally as I showed in my example. So I stay up to speed on ksh syntax as well. Real example: I was on a broken system and cat and ls didn't work, nor did most commands. So I do a quick:
and I can look around with commands like "myls /etc/*" and "mycat somefile". It's very handy being able to pull stuff like that out of my hat when I need to.
Help!
I'm would like to log in su - within a script an contuine to run the commands within the script. Every time I log in as su - I have to exit for the rest of the script to run! e.g.
#!/bin/ksh
su - oracle
ps -ef |grep som <--- doesn't excute command until I log out su
oracle.... (1 Reply)
Hi folks,
I have the following configuration file:
DB_LAYER=NO
ADMIN_LAYER=NO
RTESUB_LAYER=NO
DB_HOST_NAME=tornado
ADMIN_HOST_NAME=tornado
RTESUB_HOST_NAME=tornado
RESPONSE_FILE_SR=/tmp/SR.rsp
INSTALL_SR_1=/home/Upgrade_4.7.1/Utilities/Install_SR:Y... (8 Replies)
Hi,
In ksh how can I execute something like this:
remsh newhost "for i in 1 2 3 4 5 do echo file$i; cat file$i; done"
I cannot pass the contrl J or enter in th above line which is required by the for loop.
Thanks... (1 Reply)
I have a space delimited file containing: hostname OracleSID connectstring
I want to loop through the file and execute remsh to check the database processes.
cat $filename | while read HOST SID CONNECT
do
{
result=`remsh $HOST "ps -ef | grep pmon_${SID}$| grep -v grep"`
if ........ (1 Reply)
Boy I hope someone can answer this question. I've been beating my head against the wall all day trying to come up with a solution.
I have a carrot delimited file that looks like this:
ANDERSON^678934^1974^BOB
JONES^564564345^1954^ABRAHAM
SMITH^47568465^1948^JON
If I run this command:
awk... (6 Replies)
Sorry for such a dreadful title, but I'm not sure how to be more descriptive. I'm hoping some of the more gurutastic out there can take a look at a solution I came up with to a problem, and advice if there are better ways to have gone about it.
To make a long story short around 20K pieces of... (2 Replies)
I have the below code which runs on multiple databases , but this runs one-after-one. I will need this to run in parallel so that i could save a lot of time. Please help!!! Thanks in advance
for Db in `cat /var/opt/oracle/oratab |egrep -v "ASM" |grep -v \# |cut -d\: -f1`
do
{
export... (5 Replies)
OS : RHEL 6.1
Shell : Bash
I had a similair post on this a few weeks back. But I didn't explain my requirements clearly then. Hence starting a new thread now.
I have lots of files in /tmp/stage directory as show below.
I want to loop through each files to run a command on each file.
I... (8 Replies)
Discussion started by: kraljic
8 Replies
LEARN ABOUT DEBIAN
anyevent::loop
AnyEvent::Loop(3pm) User Contributed Perl Documentation AnyEvent::Loop(3pm)NAME
AnyEvent::Loop - AnyEvent's Pure-Perl event loop
SYNOPSIS
use AnyEvent;
# use AnyEvent::Loop;
# this module gets loaded automatically when no other loop can be found
# Explicit use:
use AnyEvent::Loop;
use AnyEvent;
...
AnyEvent::Loop::run; # run the event loop
DESCRIPTION
This module provides an event loop for AnyEvent in case no other event loop could be found or loaded. You don't have to do anything to make
it work with AnyEvent except by possibly loading it before creating the first AnyEvent watcher.
This module is not some loop abstracion used by AnyEvent, but just another event loop like EV or Glib, just written in pure perl and
delivered with AnyEvent, so AnyEvent always works, even in the absence of any other backend.
If you want to use this module instead of autoloading a potentially better event loop you can simply load it (and no other event loops)
before creating the first watcher.
As for performance, this module is on par with (and usually faster than) most select/poll-based C event modules such as Event or Glib (it
does not even come close to EV, though), with respect to I/O watchers. Timers are handled less optimally, but for many common tasks, it is
still on par with event loops written in C.
This event loop has been optimised for the following use cases:
monotonic clock is available
This module will use the POSIX monotonic clock option (if it can be detected at runtime) or the POSIX "times" function (if the
resolution is at least 100Hz), in which case it will not suffer adversely from time jumps.
If no monotonic clock is available, this module will not attempt to correct for time jumps in any way.
The clock chosen will be reported if the environment variable $PERL_ANYEVENT_VERBOSE is set to 8 or higher.
any number of watchers on one fd
Supporting a large number of watchers per fd is purely a dirty benchmark optimisation not relevant in practise. The more common case of
having one watcher per fd/poll combo is special-cased, however, and therefore fast, too.
relatively few active fds per "select" call
This module expects that only a tiny amount of fds is active at any one time. This is relatively typical of larger servers (but not the
case where "select" traditionally is fast), at the expense of the "dense activity case" where most of the fds are active (which suits
"select").
The optimal implementation of the "dense" case is not much faster, though, so the module should behave very well in most cases, subject
to the bad scalability of "select" in the presence of a large number of inactive file descriptors.
lots of timer changes/iteration, or none at all
This module sorts the timer list using perl's "sort", even though a total ordering is not required for timers internally.
This sorting is expensive, but means sorting can be avoided unless the timer list has changed in a way that requires a new sort.
This means that adding lots of timers is very efficient, as well as not changing the timers. Advancing timers (e.g. recreating a
timeout watcher on activity) is also relatively efficient, for example, if you have a large number of timeout watchers that time out
after 10 seconds, then the timer list will be sorted only once every 10 seconds.
This should not have much of an impact unless you have hundreds or thousands of timers, though, or your timers have very small
timeouts.
FUNCTIONS
The only user-visible functions provided by this module loop related - watchers are created via the normal AnyEvent mechanisms.
AnyEvent::Loop::run
Run the event loop, usually the last thing done in the main program when you want to use the pure-perl backend.
AnyEvent::Loop::one_event
Blocks until at least one new event has been received by the operating system, whether or not it was AnyEvent-related.
SEE ALSO
AnyEvent.
AUTHOR
Marc Lehmann <schmorp@schmorp.de>
http://anyevent.schmorp.de
perl v5.14.2 2012-04-08 AnyEvent::Loop(3pm)