I am writing a perl script which uses the matlab compiler to compile a .m file.
I am using the system("mcc �m file.m"). I have matlab installed and both script and exe are in the same drive.But i get the following error .
'mcc' is not a recognised as an internal or external command ,operable in program or batch file.
How can i find through terminal that which devices are external and which are internal.
By external i mean devices attached to USB port. For Example, USB Drive, Portable USB HardDrive etc.
By internal i mean devices attached internally. For Example, SATA Harddisk etc.
I need to execute an external command with Python from Web. I know there is subprocess module that executes external programs but I'm trying to execute a command registered for the execution of a program. In this case when I execute my file in the shell everything is Ok, but from the Web it doesn't work.
View 1 Replies View Relatedapt-get install startxwould sort this out but no joy. I don't seem to actually be able to get anything using apt-getI've tried running apt-setup but the command isn't recognised.I'm sure I'm connected up to the internet (I'm using a wired connection I run dhclient eth0 and check with ifconfig and eth0 seems all happy and connected up). I'm also trying to install mpg321 or mpg123 as it would be nice to have some tunes but I get the same "package not found" error message
View 14 Replies View RelatedCode: cmd='date | wc'
$cmd If this script is executed, an error is generated. The reason written was that "The execution fails because the pipe is not expanded and is passed to date as an argument".What is meant by expansion of pipe. When we execute date | wc on the command line, it goes fine.then | is not treated as an argument. Why?
I am trying to learn how to pass more than a one-command startup for gnome-terminal.
I will give an example of what I'm trying to do here:
Code:
#! /bin/bash
#
#TODO write this for gnome and xterm
USAGE="
${0##*/} [-x] [-g]
code....
However, running with the -g option to invoke gnome-terminal, I get a "There was an error creating the child process for this terminal" error.
This same error occurs if the gnome-terminal line is changed to
Code:
gnome-terminal -e mcTerm
Is there any way to pass more than one command on to gnome-terminal? I have tried various single and double quoting senarios and in a final attempt, I abstracted to an exported function all to no avail. Perhaps even though gnome-term is better at many things than xterm, xterm trumps it in this instance.
I am using gtk to program GUI. How can I show the output of shell command into a textbox, ex ps -efc command ?
View 3 Replies View RelatedI was writing code to execute system command, using GDM3 an logged in as root (just commented line #auth required
pam_succeed_if.so user != root quiet_success , in /etc/pam.d/gdm3).
When i execute:
Code: Select allvoid criarWindowsDialog::on_pushButton_2_clicked() {
ui->commandTextEdit->append("Processo iniciado ...");
QProcess processo;
QString comando;
QStringList args;
QString fullCommand;
QString stdOut;
QString stdError;
[CODE]..
I'm trying to call a system command in perl and am having an issue with it.
Here's an example of a command i'd like to call: Code: sed -i '4 c192.168.1.4 www.something.com' hosts this is the section in my perl script where I create the variable and call it: Code: $doit = `sed -i '$line c$ip $host hosts'`system($doit); The $line, $ip, and $host variables are working fine becasue I can replace that section with "prints" and they come out fine. I imagine the problem is where I am creating the $doit variable.
I have found this from a site [url]
Code:
But it does not work for me, segfault.
I am calling another executable in my application (C programing) using "system" command
which is user interactive program. now i want to pass those args in system command only.
system(" executable ");
Executable will expect 1,2 or 3.
1 is to continue
2 for do changes in settings
3 exit from application
how to pass these in to system command
I'm trying to convert this awk command from command line into an awk script, but just cannot get it to work:
This is what i have after my BEGIN
Am i missing something here? this just prints out the count for everyline, not counting lines on 5th field that match 'A'
suppose i store the history number of a command say :
1004 cat file
Then now i want to run it like : !1004 but by using a variable.
command=1004
!$command
i am getting errors like :
command=1004command
I am having all sorts of trouble trying to assign a variable within an awk script with the system command. I know there is a lot of ways around this problem, but for efficiency reasons, I would like to, within my awk script, do something like
system(x=3)
or
system(x=NR)
and, latter on the shell script which calls the awk script, use the variable $x. But nothing is passed to x. I have already tried things like
command = "x=3"
system(command)
and also used a pipeline within the system to pipe it to /bin/sh In fact tried a lot of stuff like that, using $(( )) etc etc etc I can create directories e write to files (yes, i could write to a file and read from there, but I dont think it is efficient, plus I am puzzled).
We have a STM32F103ZET6 microcontroller.It has an ARM cortex-M3 core.We use keil as compiler.We have both an external and internal SRAM.Now I want to declare variables in either of the RAM as I wish.For example some time critical section variables in internal and others in external.How to do this.?
View 1 Replies View Relatedbasically in the child process iam just calling the ptrace(PTRACE_TRACEME, 0, NULL, NULL) system call but if add this stsyem call rest of the code not working properly. i found the reason basically what happening is when we have ptrace() system call its printing the same variable 3 times i.e its not executing it 3 times but just it is printing 3 times .iam just wondering how it could be possible.
View 1 Replies View RelatedHow can I install linux using an external hard drive? ANy help would be greatly appreciated. I dont have any CD's or anything and this is my only option.
SO how can I install linux FROM my external HDD ONTO my internal HDD?
I'm trying to write a bash script program in the Linux command terminal that will write to a fellow user and then continue reading down the program. this is what i have (kind of explains the idea too):
#!/bin/sh
clear
echo "this is before the write command"
write jcummins
this message should go to jerry
echo "the message didn't send and this string will not appear"
echo "it appears it has stopped at the write command"
Find external and internal devices attached to a system in Linux
How can i find through terminal that which devices are external and which are internal.
By external i mean devices attached to USB port. For Example, USB Drive, Portable USB HardDrive etc
By internal i mean devices attached internally. For Example, SATA Harddisk etc.
I am trying to fix a perl script, and I really suck at perl. But I think this problem will be easy for people who know it.
The problem is, I have an old setup script someone wrote many years ago. It fails if the standard shell is dash and not bash. The only way I've gotten it to work is to point /bin/sh to bash. I looked thru the script and it uses "system" many places, and I think that's the problem.
I searched for it and found this link:url
My plan is to include this function:
Code:
sub system_bash {
my @args = ( "bash", "-c", shift );
system(@args);
}
Then I could simply change all calls to system into system_bash and it should work?
The parameter to the system calls is usually some variable. What if the parameter is a list already? Do I need to test for it somehow, and if it's a list, prepend "bash" and "-c" to the list? How do I do that?
In the script there are lots of places like this:
my $error = system($cmd);
if ($error) {
die/warn "some error message";
}
Shouldn't there be a return in the system_bash function?
I am trying to grep multiple numbers from file, grep does have the -f option for that.
Code: grep -f <`seq 500 520` /etc/passwd I know this could be done with
Code: for i in `seq 500 520`; do grep "$i" /etc/passwd; done But my question is fare more behind this example. It is possible to redirect one command output which will be treat as a content of file for another command ?
Send an E-mail to your local account. Try two different ways to send and read it. How can you check that it really arrived? I decided to try using the 'mail' and 'pine' commands. So:
1) Using the root account, intending to send an e-mail to myself (root):
Code:
# mail -s "Hello root!" root
Simple form of sending e-mails internally.
^D (this keystroke is to finish the e-mail)
EOT
2) Using 'pine', another e-mail client: The mail is composed correctly, with 'To:' field set to:
Quote:
[URL]
which is my hostname, as my box runs in a VMWare Slack 12.2 image. In both cases, nothing was received in my mailbox (by typing #mail)... Additionally I don't see any new e-mails when I look at the file '/var/spool/mail/root'. Do I need extra information configuring my mail client/server/service?
system() and execvp() both work by creating a new process. Question: Do they create new processes by internally calling fork() or there is some other way ?
View 6 Replies View RelatedRecently I took the internal hard drive from my old desktop PC (Ubuntu 10.04 ) placed it into an external HD Case connected it up to my new desktop PC (Ubuntu 10.04.) and I could access the files on the external HD, that is until this weekend, I now get this error message. Unable to mount 319 GB Filesystem
Error mounting: mount: wrong fs type, bad option, bad superblock on /dev/sdb1,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so
Could someone please advise me what needs to be done , so I once again view and access the files held on my external HD.
I have an external hard drive with an xfs partition on it. It was using an external journal, but in re-installing Slackware I removed the partition holding the external journal, forgetting what it was at the time. I didn't touch the contents of the external hard drive, but now I can't mount it and the various xfs programs seem to demand that it be mounted in order for them to change anything.Anyone have any ideas on how to change an xfs partition from external log to internal? Failing that, how do I get the information off it?
View 1 Replies View Relatedhas anyone successfully mounted and external HFS firewire HDD from command line? I installed all the HFS tools but I haven't been able to mount it. It is not even recognized by fdisk. GNOME seems to mount it without an issue but in my case it is a server and I don't want to have GNOME eating up my scarce resources.
View 1 Replies View RelatedFor some reason I cant get the syntax to switch to a directory in my external harddrive. I know I've done it before but now I can't get it to work. Here is what I've done.
cd /home/media/My Book/folder Where MyBook is the name of the hard drive.
I normally use the "locate" command to find files that I have on my local drive. However, if I wanted to do this for an external drive, how would I go about this?
From what little I know about Linux, I'm guessing that it creates a reference file from which it performs the search when the command is typed. If I'm right this is updated at a given interval or when "updatedb" is used?
As the external hard drive is not always mounted is it best to create another of these reference files and have a different command (e.g. locateext) or something? Or is it best to add the external hard drive's location to the list of files that get added with updatedb.
I'm running Fedora 11.
i've gotten my fedora 12 to the point where i can run python3 scripts from command line and can call up python 2.6.2 idle with the command 'idle' from command line. what command will call up python3 (3.1.2 to be exact) idle?
View 5 Replies View RelatedI have a Linux application(ProMAX 5000) running in a virtual Machine on my windows OS. I am using an external Hard drive of 250G in ext2 file system as my device for large data read, write & execute file system. I have already mounted the device from /etc/fstab. But i want my application to access this device as a Primary data storage device OR Secondary storage device. What command will i invoke to partition this 250G drive as my primary or secondary storage device.
View 1 Replies View Related