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Linux common commands gdb commands are included in GNU's gcc development kit and are powerful program debuggers.

Syntax format gdb [parameters] [file]

Common parameters:-cd sets working directory-Q quiet mode, does not print introduction and version information-d adds file lookup path-x executes GDB instruction from specified file-s setting reads symbol table file common commands:

File load the executable program file being debugged run restart to run the file start step execution, run the program, stop at the first execution statement list to view the original code, abbreviate lset to set the value of the variable next step debugging (step by step Function execution directly), nstep step debugging (sentence by sentence: jump into the custom function), sbacktrace to view the stack frame and hierarchical relationship of the function call, btframe to switch the stack frame of the function, finfo to view the value of the local variables inside the function, ifinish to end the current function, return to the function call point continue to continue running, cprint print value and address, pquit to exit gdb, Q to display details

The gdb command has more internal commands. Enter "help" at the gdb command prompt "(gdb)" to view all internal commands and instructions. To debug a program using gdb, you must add the "- g" parameter when compiling the source code using gcc.

Start the gdb debugger with reference to the example:

[root@linux265 ~] # gdb (gdb) loads the binary executable program:

(gdb) file linux265.out runs and tracks the program:

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