[Linux Tools]-yum/gdb usage tutorial!

yum is a commonly used software package management tool, and gdb is a powerful debugging tool. Here are their usage tutorials:

1. yum usage tutorial:

   • Install the software package: Use the yum install command to install the software package. For example, to install the Apache web server, you can run yum install httpd.
   • Upgrade software packages: Use the yum update command to upgrade installed software packages. For example, running yum update will upgrade all packages in the system.
   • Delete the software package: Use the yum remove command to delete the software package. For example, to remove the Apache web server, you can run yum remove httpd.
   • Search for software packages: Use the yum search command to search for available software packages. For example, running yum search mysql will display a list of available packages related to MySQL.
   • List installed software packages: Use the yum list installed command to list installed software packages.

2. gdb usage tutorial:

   • Add debugging information when compiling: When compiling C/C programs, use the -g option to add debugging information to the executable file. For example, gcc -g program.c -o program.
   • Start gdb: Run the gdb command in the terminal to start the gdb debugger and specify the executable file to be debugged. For example, running gdb program starts gdb and loads an executable file named program.
   • Set a breakpoint: Use the break command in gdb to set a breakpoint and specify the location where you want to pause execution in the program. For example, running break main will set a breakpoint at the program's main function.
   • Execute the program: Use the run command to run the program. For example, running run begins executing a program until a breakpoint is encountered or the program ends.
   • Single-step execution: Use the next command to execute the program line by line. For example, running next will execute the current line and move to the next line.
   • View variable value: Use the print command to view the value of the variable. For example, running print x will display the value of variable x.
   • Trace function calls: Use the step command to track function calls. For example, running step will step into the function called in the current line.
   • Exit gdb: Run the quit command in gdb to exit the debugger.

This is the basic usage guide for yum and gdb, I hope it will be helpful to you. Please note that this is only a brief overview, these tools have many more features and options to explore. It is recommended to consult relevant documents and materials for more detailed information and guidance.

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