Does Debian 6 "Squeeze" automatically run boot processes in parallel if not how do I
configure it to do so. Here is the quote from my /etc/init.d/rc :
# Specify method used to enable concurrent init.d scripts.
# Valid options are 'none' and 'makefile'. Obsolete options
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I am trying to replicate what is happening on this page under the tcsh shell, but using the bash shell found in Wheezy. Here is the page I am referring to:[URL] The command I am trying to replicate is on page 6 under figure 2.4. The command is "prompt> ./mem &; ./mem &".
I would like to run the same program twice, concurrently, but do not know how. Note that I am not trying to use a bash script, but rather by simply using syntax on the command line.
I'm looking for a way in Perl to be able to take a list of servers, ssh multiple commands to it and store the results. If I do this process serially, sometimes one server will hang the whole script and if it doesn't, it still takes hours to complete.
I'm thinking what I need to do is make a parent loop that calls out a separate process that passes the server name to the child sub process and then executes all the commands I have defined in its own process. If one server 'hangs', at least that won't stop the script from doing all the other servers in the list.
I'm guessing using the fork() command would serve me best, however, all the online descriptions I have found have been vague at best.
I was asked to research if it is possible to install a Debian distribution of Linux to HP Z420 Workstations as second OS (dual boot) in our lab. The lab is normally used for Computer Aided Design (Windows 7). The plan is to have parallel computing possible with these workstations on Linux side.
The link for HP Z420 Specs suggests amd64 distrubition should be supported. Tell me If I'm wrong as I have always been interested in software side of things.
Looking for info regarding installation of Debian to HP Z420 workstations as well as using these computers for parallel computing with Debian.
I have a bash script with a line like this in it:
Code: mysqldump -uusername -ppassword --master-data=2 --single-transaction --quick --add-drop-table --add-drop-database somedatabase | gzip > ./somedatabase.sql.gz The problem is, I have about 16 databases I'm dumping like this, but it's dumping
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So, does putting in a & after a command work in a bash script at all? The thought was, if I want to run them in parallel, should I do this?
Code: #!/bin/bash
./scripts/dumpthis &
./scripts/dumpthat &
./scripts/dumpsomemore & Where "dumpthis" is just the first snippet of code above.
I have a script which basically does many tasks and most of them can run in parallel. The server it runs on has 4 cores, so I changed parts of it to a makefile, and then run them with "make -j 4" which helps a lot. But looking at "top" while it runs, I see it could be improved. Sometimes tasks wait for other servers, so a higher -j value would help. And sometimes multiple tasks are waiting on the same disk, then I think a lower -j value would be better.
The kernel is fairly good at sharing CPU time among the cores, but resources like memory and disks are not shared very well. As an experiment, I tried compiling the kernel with "make -j" with no number. It didn't go very well.
So I wondered if anybody know of a better tool for things like this. I think it should be possible to write something that could change the -j value while it runs.For example:
- Start as many tasks in the background as there are cores. When tasks finish, start another one until done.
- After a little while, check CPU and memory usage to decide if more tasks could run in parallel. Or maybe less?
- If different tasks iowait a lot, check if they wait on the same disk. If so, renice/ionice/suspend some of them. In these situations I think it's better to have them run one after another.
- Other ideas?
I thought of making a script like that, but I doubt I'm the first one with that problem. Also, there are probably lots of things I haven't thought of.
I am a newbie user in Linux. I have installed a package were it has EMC2 software but when I run it shows parallel lines on the screen while running? What is the cause for it ? Should I reinstall ubuntu again? I had taken a screen shot and it will tell you what I really mean? This is the screenshot, [URL].
View 1 Replies View RelatedGNU/linux kernel 2.6, Slackware 12.0.Hi:How do I know what processes are running?
View 6 Replies View RelatedI list all the instances of a running process my doing:ps -ef | grep myprogramThis lists all them.how can I simply output a count of how many are running?
View 2 Replies View RelatedI would like to do the following: Create a banner for any user logging in through ssh which warns him/her about the number of processors being used already by other users (or conversely the number of free processors). For example, if a user logged in he would then see a message like: Warning! 7 out of 8 processors are in use.I already figured out how to do a banner and with ps -e -o pcpu I can get all processes' %CPU usage. I think I would like to count the number of processes which have more than 90% CPU usage and output this number ("7" in the example) in the banner
View 7 Replies View RelatedTo: The Cog >>>
Code:
The Cog, heres the reszults for ps -ef | grep tty:
yo mama@blah:~$ ps -ef | grep tty
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Ubuntu 10.10. I am curious if there is kind of task manager in ubuntu I can see running processes etc? Like windows task manager?
View 5 Replies View RelatedHow can I find the PID for all processes running for a particular port?
View 3 Replies View RelatedMy University gives us access to a Linux server, named stud1.
Code:
me@stud1:~$ uname -a
Linux stud1.some.univ.ac 2.6.9-89.31.1.ELsmp #1 SMP Mon Oct 4 21:41:59 EDT 2010 x86_64 x86_64 x86_64 GNU/Linux
Apparently I was logged in, and never logged out sometime:
Code:
me@stud1:~$ who
<snip>
me pts/37 Jan 30 13:27 (6.6.66.66)
<snip>
me pts/58 Dec 30 19:13
but when trying to find out why I'm still logged in, I can't find it:
Code:
me@stud1:~$ ps faux |grep me
root 30030 0.0 0.0 51128 4360 ? Ss 13:27 0:00 \_ sshd: me [priv]
me 30033 0.0 0.0 51132 2336 ? S 13:27 0:00 \_ sshd: me@pts/37
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how can I logout this unused session?
I have p1,p2,p3,p4 some processes created by me in C. p1, p2, p3 are started individually from several consoles. And I want process p4 to terminates processes p1, p2, p3 if they are running. Which is the easiest way to accomplish that? put all processes in the same process group and send from p4 a kill signal to the group. But I couldn't do that because I cannot call successfully setpgid(getpid(), 15000) from p1-p4. It's there some way to put them in the same group? the processes don't have a child-parent relationship, they are launched manually from consoles.
View 1 Replies View RelatedWhen I ps -e, I see a whole bunch of processes, many more that when I ran Slackware.Is there a list of processess I can look at to see what they are and what ones I dont need, instead of googling each one and getting some cryptic explanation?
View 2 Replies View Relatedis there any possible way to hide currently running processes from an user? This means I do not want him to know about what programs/processes does any other user but him run. In short words if that user runs 'ps -aux' he should get only his processes.
View 3 Replies View RelatedI'm looking for a command that will give me a list of users (unique, dont name my user account 60 times) that are running processes on a system.
View 5 Replies View RelatedWhen I open top and look at the running processes, there a bunch that are -5 in the nice and 0 with everything else.
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Ran the most recent updates several days ago and now System Monitor show my CPU at %100 constantly although it shows no processes running.
View 9 Replies View RelatedFirst time Ubuntu user (used to be on debian earlier).
I like that everything works out of the box (had to install codecs etc, but thats standard); but I dont like that there are 260 processes running. Is there a utility to stop unnecessary processes from running in Ubuntu 10.10? I used rcconf but there did not seem to be a whole lot of startup processes that were enabled. Yet somehow I am running 260 processes now.
Even if I log into fluxbox, I get 200+ processes running.
I am trying to get a list of running processes using audio (using gstreamer), just like in gnome-volume-control, under applications, but have so far been unsuccessful in finding anything in either the gtk or gstreamer library, anyone out there who can point me in the right direction?
View 1 Replies View RelatedThe command used to view processes running on the Linux machine is?
View 8 Replies View Relatedhow to write a shell script the searches for processes running on my system. I really don't know where to start. can anyone give me a hand and explain how the script works?
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View 1 Replies View RelatedWhile executing df command on an AIX Console, by mistake I ended the line with an ampersand:
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I have written this script to monitor Apache2:
Code:
#!/bin/bash
#count lines that show apache2 but not the fgrep itself
let i=`ps aux | fgrep apache2 | fgrep -v grep | wc -l`
if [ "$i" -gt 0 ]
then
#log something
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It has all been working fine until recently when Apache is becoming unresponsive. I manually ran ps to check and there were 3 processes. However when I ran apache2ctl graceful I got the message 'httpd not running, trying to start' Is there a better way to check if a daemon is up?
my computer is often very slow, to the point of stalling. I tty'd in and when I ran ps -ef I noticed about 10 /usr/sbin/apache2 -k start I dont even want 1 apache running. Any suggestions why these are running, or how to stop it? Well, I can stop it with a sudo killall, but how can I make sure it doesnt happen again?
View 5 Replies View Relatedhow to list the currently running processes via code a shell script. FYI i now about the top method in the terminal but i need a way to have it via a shell script.
View 4 Replies View RelatedI'm trying to get the end result to have the same format as this as well:
1 bin
2 daemon
67 erozner
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Where the numbers are the number of processes being run by the user (the name right next to it).if I input the command egrep myFile into the terminal, it should look for every line with the letter x in myFile, right?