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How to set ip address to a computer in Qt (Solved)

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  • H Offline
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    houmingc
    wrote on 27 Jan 2015, 09:30 last edited by
    #18

    cat passwd.txt return my password correct

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    • H Offline
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      houmingc
      wrote on 27 Jan 2015, 09:30 last edited by
      #19

      cat passwd.txt return my password correct

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      • H Offline
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        houmingc
        wrote on 27 Jan 2015, 09:34 last edited by
        #20

        it works when i do a sudo su
        it doesn't work without permission, what should i do next?

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        • H Offline
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          houmingc
          wrote on 27 Jan 2015, 09:34 last edited by
          #21

          it works when i do a sudo su
          it doesn't work without permission, what should i do next?

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          • P Offline
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            p3c0
            Moderators
            wrote on 27 Jan 2015, 09:40 last edited by
            #22

            It does work for me from the App and Outside
            @
            args<<"-c"<<
            "sudo -S ifconfig eth0 192.168.100.21</home/ubuntu/passwd.txt";
            @

            There should be a space before and after < in above command.

            157

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              p3c0
              Moderators
              wrote on 27 Jan 2015, 09:40 last edited by
              #23

              It does work for me from the App and Outside
              @
              args<<"-c"<<
              "sudo -S ifconfig eth0 192.168.100.21</home/ubuntu/passwd.txt";
              @

              There should be a space before and after < in above command.

              157

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              • H Offline
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                houmingc
                wrote on 27 Jan 2015, 09:41 last edited by
                #24

                under /opt
                cat >password.txt 'Key in my password'
                cat password 'Check my password'

                its work, thanks alot :>>

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                • H Offline
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                  houmingc
                  wrote on 27 Jan 2015, 09:41 last edited by
                  #25

                  under /opt
                  cat >password.txt 'Key in my password'
                  cat password 'Check my password'

                  its work, thanks alot :>>

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                  • P Offline
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                    p3c0
                    Moderators
                    wrote on 27 Jan 2015, 09:52 last edited by
                    #26

                    Well then get the errors using readyReadStandardError() signal if any.

                    157

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                    • P Offline
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                      p3c0
                      Moderators
                      wrote on 27 Jan 2015, 09:52 last edited by
                      #27

                      Well then get the errors using readyReadStandardError() signal if any.

                      157

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                      • H Offline
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                        houmingc
                        wrote on 27 Jan 2015, 10:01 last edited by
                        #28

                        what does "-c" in front of "sudo -s" meant or used for??

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                          houmingc
                          wrote on 27 Jan 2015, 10:01 last edited by
                          #29

                          what does "-c" in front of "sudo -s" meant or used for??

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                            p3c0
                            Moderators
                            wrote on 27 Jan 2015, 10:23 last edited by
                            #30

                            It is for sh so that it reads commands from argument strings. Check "this":http://manpages.ubuntu.com/manpages/utopic/en/man1/sh.1posix.html man page for more details. I hope your system has sh command.

                            157

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                              p3c0
                              Moderators
                              wrote on 27 Jan 2015, 10:23 last edited by
                              #31

                              It is for sh so that it reads commands from argument strings. Check "this":http://manpages.ubuntu.com/manpages/utopic/en/man1/sh.1posix.html man page for more details. I hope your system has sh command.

                              157

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                              • H Offline
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                                houmingc
                                wrote on 9 Jun 2015, 07:03 last edited by houmingc 6 Sept 2015, 07:04
                                #32

                                QProcess Class is used to start external programs and to communicate with them.
                                create a new QProcess and input args to /bin/sh.
                                Below code has been tested working.
                                Thanks to p3c0, if not, answer below will not be available :

                                QProcess *myProcess = new QProcess;
                                QStringList args;
                                args<"-c"<<"sudo -S ifconfig eth0 192.168.100.1 < /var/passwd.txt");
                                myProcess->start("/bin/sh",args);
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