Programming :: Terminate All Running Subshells?
Nov 21, 2010
I have a script that starts a subshell
Code: #!/bin/sh
local SSPID
clean_exit() {
[Code]....
done so the script waits in the loop for the subshell to finish then does processing and starts over. If I kill the script the subshell is not killed. So I can trap the TERM event and do some cleaning but I need to know the subshell process id.
I'm using busybox so ps does not accept any parameters I cannot source subshell so it can access its parent environment
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Sep 30, 2010
In Fedora 13 64 bit, Ctrl+C does not terminate the running programing in terminal window but in Unbuntu this shortcut key works. If I hit Ctrl+Z, this makes the running program run in background which is something I definitely dont want. what is the shortcut for terminating a program in terminal window? What is the shortcut key for canceling the command I have typed but not run yet no matter where the cursor is in the command ? Ctrl+U works but only if cursor is at the last character of the command.
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Jun 2, 2010
changed terminal into raw modecfmakeraw(&termios);After that terminal no more captures CTRL+CIs there a way to enable CTRL+C (to terminate the program) while still have RAW mode?
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Jul 13, 2010
I have written a code in which i have used vectors:
vector< vector<double> > arr;
arr.resize(x,vector<double>(x,0));
x is a variable which is taken from a very beg text file > 64MB
first line of my code is
cout<<"
Wait Running...";
my code takes text file as an input, takes its data and generates an output text file....
Code is running fine for small data tried till x= 10
but while trying to run with large data ie x = 5000000 approx it is giving error
Even the first line of the code is not displayed. NOTE: variable is declared global but its size is defined in main.
The error that i am getting after approx 2-3 minutes is:
terminate called after throwing an instance of 'std::bad_alloc'
what(): std::bad_alloc
Wait Running...Aborted (core dumped)
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Jun 13, 2010
When we are asked for password while booting Linux, is that the login shell ? If yes, we can't seem to be able to do anything in that shell besides typing the password. (Is it in this that the contents of /home/.profile file gets executed ? in a sigle PC)
When we click on the terminal icon for the first time, are we opening a subshell of something or a new shell altogether? If on repeatedly clicking on the terminal icon, new shells are being launched, not sub-shells, then why does export seem to work with the new shells, though its supposed to work for subshells ?
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Sep 4, 2009
Is suid disabled from running all home made bash scripts or just from running them as root or:
Who would know for sure.
I googled several combinations of Mandriva Linux how-to suid disabled setUID etc... so far all I found was "many distributions are disabling suid for security reasons" nothing specific.
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Jun 1, 2010
My root Vixie cron crontab is set to perform a system snapshot via fsarchiver: 0 0 * * * fsarchiver savefs -o -A /backups/p30_root.fsa /dev/sda2 /dev/sda3 The command itself works fine, generating about a 7G snapshot of my Suse server. I then wish to rsync this to a NAS I have located in another building: 0 3 * * * rsync -av -e ssh --delete /backups/ root{at address}:/DataVolume/os_backups/
(yes, I'm rsyncing as root. I absolutely loathe it, but I got thrown into an quasi-SA position with a ridiculous to-do list and no time to do it. I'm having to make things just work and then go back and try to improve them/learn how. I couldn't make it work in a non-root way quick enough, so for now I'm having to cron rsync jobs as root because of all the differing file permissions on this samba/MySql server. I set the NAS to only accepts ssh from the server IP, and we're behind a campus firewall... It's serious trial by fire.) The crontab also has rsync commands for the samba areas, our specialized chemistry software and affiliated MySQL databases............
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Mar 3, 2011
I have a machine running Fedora 14 and a bunch of movies stored on it as '.iso' images. It is connected to my home theater. I used to use VLC to play these movies and it worked great for a long time. About 4 months ago, about an hour or hour-and-a-half into a movie, the audio suddenly "disappears" and the machine goes CRAZY with almost 100% of the CPU spent writing to the SWAP. At first I thought the machine was locked, but it isn't; it's so doggone busy writing swap. I am unable to get enough cycles to terminate anything. I found the swap activity through System Monitor - it was ABRUPT. Sound stopped, machine became preoccupied with swap.
I have removed/reinstalled VLC, the machine has undergone a couple kernel updates, and I have removed/reinstalled a number of things associated with audio (CD ripper, mpeg stuff, etc.) yet the problem persists. I don't know what happened or when (update-wise). Any body got any ideas? While a solution would be great, I'd also be happy with a couple decent suggestions on what to look for.
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May 28, 2011
Just now Rhythmbox has stopped working. I can't restart it, so I thought I could kill the process to start it again. Is there something like the windows task manager in openSUSE or another way to list all processes and to kill one? I googled an found a few old threads saying that there is a performance monitor which is able to to that, but I can't find that either.
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Dec 10, 2010
I have an issue with my web server. We are running RedHat Enterprise Linux 3.0 with Apache 2.0 and Tomcat 5.5. The situation has arisen that the httpd sessions never terminate. New connections continue and continue to be created and never die. I have restarted the apache services to reset the connection and have even rebooted the server, however, to no avail. Yes, that does the trick of getting the web sites operational, however, this is not a solution.
I have searched and searched here, www.google.com/linux to no avail. I have looked through the apache.org bug tracker and can't find anything like what I am experiencing. This happened 6 months ago and I got lucky and it stopped, however, the situation has resurfaced. I have reviewed the logs and found nothing that provides any insight.
During the business day, the number of httpd connections continue to grow and I decided to let it see how high it would get before the web sites would crash. That magical number is 203. Now that it is later in the evening and about 2 hours since I restarted the httpd services, I now only have 59 connections. However, I'm fairly certain based upon the traffic on these 2 websites, that in the evening, there aren't many connections after 2000 hours.
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May 9, 2011
I'm using tigthvnc server on linux machine. Often my clients are closing their vncviewrs from close button ('X'), and not exiting gracefully their sessions from OS. How can I terminate the server when they do that?
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Jan 31, 2010
I have a script to establish a reverse tunnel with other machine,My problem is to stop the tunnel. If I just kill the PID at sshtunnel.pids, ssh does not release the ports at the server side, so any new connection will fail for several minutes.Is there any way to signal SSH to exit gracefully?
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Feb 18, 2010
I have a new UEC (Ubuntu 9.10) server up and running. I'm running a self contained solution so the cluster and node are on the same machine. I know this isn't ideal but I only have one server. I followed https:[url]... and https:[url].... When I try to run a VM (Ubuntu 9.10 amd64) image it will go from pending to shut-down to terminated. I know others have had this problem but I haven't see any solutions. I'm hoping there might be one out there that I've missed. I'm running on an AMD 64-bit quad core with 8GB DDR3 RAM.I am not seeing any errors in the logs.
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Aug 6, 2010
I am having an issue with HTTPS certification using curl. My curl is configured with OpenSSL. If the certification verification is failed I dont want to terminate the operation, instead I want to continue by just putting a log message. For this I have used OpenSSL SSL_CTX_set_verify() function to set my static C callback function. During HTTPS transaction, my callback is also getting called with first parameter 0 or 1 (depending upon of the certificate verification is success or failure). But even if my certification verification is failure, I want to continue. So I have hard coded to return value as 1 always from my callback function. But still I see the certification error and I don't get the page.
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Jan 1, 2010
I have problem with sshd server, its authenticate user and then terminate the session. Here is debug log:
Jan 1 04:26:41 server sshd[29677]: debug1: userauth-request for user root service ssh-connection method none
Jan 1 04:26:41 server sshd[29677]: debug1: attempt 0 failures 0
Jan 1 04:26:43 server sshd[29677]: debug1: userauth-request for user root service ssh-connection method password
Jan 1 04:26:43 server sshd[29677]: debug1: attempt 1 failures 0
Jan 1 04:26:43 server sshd[29676]: Accepted password for root from xx.xx.xx.xxx port 50971 ssh2
Jan 1 04:26:43 server sshd[29676]: debug1: monitor_child_preauth: root has been authenticated by privileged process .....
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Aug 3, 2010
I am running KDE 4.4.4 Stable from the openSuSE Repository for KDE 4.4.4 stable as included with 11.3.At first after initial installation Kontact worked and I could access Email, Address Book, Calendar, etc. from the icon bar. Now, Kontact starts, opens the Summary page, but no selections respond, only the Kwin responds to terminate the application, it just seems to hang and has to be killed to terminate. Anyone have similar issue or ideas on what may be causing it? I can start KMail, Kaddressbook, as separate applications and all respond as normal.
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Feb 21, 2011
when i type the command ssh node2@ip the terminal hangs up a bit then an error message stating that connection timeout but here is a thing: i cant ping to node2 but i can terminate the ping manually using ctrl+c when i terminate the ping usual message appears stating 10 packets transmitted, 100% loss ps: when i go to node3 and ssh to node2 it works fine and also i can ping from node3 to node2 very fine. and the firewalls are down at all nodes
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Mar 16, 2010
I have a BASH script which at one point asks the user a yes/no question. I want to make it so that if the user types in an invalid input 3 times consecutively then the BASH script will echo an error and terminate with exit status 1.
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May 4, 2011
I have written a c program. And compiled it to make a binary. Now when i try to call this binary from php page, it is not being executed.
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May 20, 2010
I have a script I would like to run every time a specific folder changes. I want this to be run the instant the folder is changed every time it is changed.e found some information about inotify and it sounds like it would probably do what I want,but am unsure if it can be made to watch only a single folder rather than the whole file system, and I'm unsure of how quickly it works
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Oct 1, 2010
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
[Code]....
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.
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Apr 27, 2010
I was wondering why this code only returns me the same value ten times instead of valuate the conta+0.1 value code...
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Aug 1, 2010
In the code segment below is a for loop I am having some considerable difficulty with. It just keeps iterating endlessly and totally ignores the 70 times limit specified. I can't ever remember having this problem before and am absolutely Clueless.
Code:
for ( x = 0; x < 70; x++ )
{
fputs ("CSN00", target);
fprintf (target, "%d", userid);
[Code].....
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Aug 25, 2010
I am executing the script.
with help of cron job but it is not executing in cron job.
i check owner and chmod and create the file and execute manually it is working fine but in cron job i set below
Crontab -e
8 14 * * * /home/tplinux/webapp/tpadminhost/collect_ejxml/ejrename.sh
wq!
after that wait till that time but script is giving message no such file in directory but same thing is excute manually it is running fine and found the files.
Below is my script details
file name ejrename.sh. code...
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Nov 17, 2008
I am trying to use perl to run a program using the eval command but the program runs infinitely, i just need it to run basically for one second, stop then give me the output. I tried using fork but it does not really work. The child process is not being killed.
my $pid = fork;
if ($pid == 0) {
my $results = `ngrep etc...`;
[code]...
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Apr 1, 2011
I have written a small script from that iam appending the output to a file.If multiple users invoke the same script or if i invoke the same script n number of times (using &), the output file(ZZ/OUT) contains messup information.
++++++++++++++++++++++++++++++++
#!/bin/bash
#
[code]...
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May 22, 2010
I have an HTML page that I want to run some PHP code. I found several "How tos" about this but I can't get it to work. The code is very simple:
Code:
cat test.html
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
[code]...
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Aug 17, 2010
i want to use java as tool in which i give an input,and on the basis of this input my specific script run. for example.... if we talk about web server.. in my java page..i have to just type my web page name...say [URL] and then enter the text...say "hi how are you"
then my script will run... in the script it itself start the service,then edit the configuration file in /etc/httpd/conf/httpd.conf
and make changes according to my input in java page... i know the scripting but i dont know how java command will execute my script...
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Sep 18, 2010
i want to run c graphics program on linux for that i want to install[URL]but i dont know how to install this graphic file on linux to make it un.
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Mar 18, 2010
i have two scripts called: type & selecttype. In type i have only the name of the products ex.: product1 & product2. Now, i am going to ADD product3 which includes productA, productB, productC, productD, productE, productF. so my new type script (menu) looks as below:
1) product1
2) product2
3) product3
and my current selectype looks as below ( which is set only for product1 & product2)my question is how can include the new product3 with all other multiple selections (productA, productB, productC, productD, productE, productF) into my current selectype as below:
#!/bin/sh
echo SELECTTYPE
export -n selecttypechoice
[code].........
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