How to run a system command in Qt?
QProcess process;
process.start("gedit", QStringList() << docPath);
the same as above
QProcess process;
process.start("gedit", QStringList() << "/home/oDx/Documents/a.txt");
Also, read this.
QProcess::execute() may be helpful:
QProcess::execute("gedit /home/oDx/Documents/a.txt"));