# Debugging with QEMU

Run QEMU with -s switch to enable its GDB stub. The default port number is 1234. If desired, the -p command line switch can be used to change it. The -S command line switch causes the execution to be suspended at startup. For example:

```
 qemu.exe -s -S -L . -m 128 -hda linux.img -soundhw all -localtime -M pc
```

For better debugging, make sure to set the following options in [GDB Debugger options](/8.4/user-guide/debugger/remote-debugging/remote-gdb-debugger/remote-gdb-debugger-options.md):

```
 Software breakpoints at EIP+1: disabled
 Use CS:IP in real mode: enabled (when debugging 16-bit (real-mode) code)
```

In other aspects debugging with QEMU is the same as debugging for other targets.

Back to [Remote GDB Debugger](/8.4/user-guide/debugger/remote-debugging/remote-gdb-debugger.md)


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