Here is my goto list of commands to help narrow down the field when I'm trying to debug things,
- which is a quick way to find out where a command resides -- if it does at all
- Using the -a option, you can see all of the places where the command could be defined
- By default, functions and aliases are not searched by which. However, the manual documentation for which suggests you set which to the following,
- (alias; declare -f) | /usr/bin/which --tty-only --read-alias --read-functions --show-tilde --show-dot $@
- type is a big step above which and will tell you more in depth information about the command
- Using the -a option, you can see all of the places where the command could be defined
- env with no arguments, this lists the global variables in scope
- declare on its own will list every variable and function defined. It can give you a little more information about functions than the methods above.
- Use the -f option to see the definition of the function
- Use the -F option to show only the name and attributes.
- To see where a function is defined (file and line number), you have to enable the extdebug shell option. This is probably my favorite!
- shopt -s extdebug && declare -F $yourFunctionName
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