GDB stuff, of course (separate Fedora package).

Links:

• GDB home page

Packages:

$ rpm -q gdb gdb-headless
gdb-8.3-6.fc30.x86_64
gdb-headless-8.3-6.fc30.x86_64
$

$ gdb -version
GNU gdb (GDB) Fedora 8.3-6.fc30
...
$

(gdb) l[ist]
(gdb) l 10
(gdb) l 10,12
(gdb) l -
(gdb) <ENTER>