org external links

• https://orgmode.org/manual/External-Links.html

• line number: path_to_file::num

• some words: path_to_file::some words

• task title: *path_to_file::task title

• id: path_to_file::#custom-id

• elisp: elisp:zone

gdb basic command

• https://www.tutorialspoint.com/gnu_debugger/gdb_commands.htm

• b main: Puts a break point at the begining of the program

• b: Puts a breakpoint at the current line

• b N: Puts a breakpoint at Line N

• b +N: Puts a breakpoint N lines down from the current line

• b fn: Puts a breakpoint at the begining of function “fn”

• d N: Delete breakpoint number N

• info break: List breakpoints

• r: Runs the program until a breakpoint or error

• c: Continus running the program until the next breakpoint or error

• f: Runs until the current function is finished

• s: Runs the next line of the program

• s N: Runs the next N lines of the program

• n: Like s, but it does not step into functions

• u N: Runs until you get N lines in front of the current line

• p var: Prints the current value of the variable “var”

• bt: Prints a stack trace

• u: Goes up a level in the stack

• d: Goes down a level in the stack

• q: Quit gdb

gdb basic command examples

• r | r arg1 arg2 | r < file1

• l | l 50 | l myfunction

• next | step | finish

• break 45 | break myfunction | continue

• print x | set x = 3 | set x = y

• call myfunction | call myotherfunction(x) | call strlen(mystring)

• display x | undisplay x

• handle [signalname][action]

• handle SIGUSR1 nostop

• handle SIGUSR1 noprint

• handle SIGUSR1 ignore

• more detailed example: https://www.tutorialspoint.com/gnu_debugger/gdb_debugging_examples.htm