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GDB is great. I definitely recommend checking out watchpoints as well, a very useful tool for monitoring how a variable changes over time.
GDB also has many good plugins - pwndbg has tons of features and UI improvements over stock GDB.
https://github.com/pwndbg/pwndbg
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gef
GEF (GDB Enhanced Features) - a modern experience for GDB with advanced debugging capabilities for exploit devs & reverse engineers on Linux
Using vanilla GDB is painful. As a bit of a shameless plug I recommend you check out GEF[1]. It's a large python script that extends GDB to make it a lot better to use. Notably it shows a lot of the state automatically every time the inferior stops. It's oriented around reversing and exploit development, but it definitely doesn't have to be used that way.
[1] https://github.com/hugsy/gef
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I can't believe no one has mentioned `gdb-dashboard` [1] yet! I use it extensively. [2]
Beyond that, I have recently learned how to write custom pretty printers for GDB. This saves a lot of screen space. I should probably update [2] soon with those new techniques.
GDB is powerful, useful, and after getting my start in IDE debuggers, including Visual Studio, I struggle whenever I have to go back.
[1]: https://github.com/cyrus-and/gdb-dashboard
[2]: https://gavinhoward.com/2020/12/my-development-environment-a...
