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How to reuse the output of a command?
You can use -exec to run a command on the output of a command. So it will be a reuse of the output as an example given with a find command below: you are saying here -> find a file called anything.out in the current folder, if found, remove it. If it is not found, the remaining after -exec will be skipped.
Can you re-use the last command in Bash?
You can use $ (!!) to recompute (not re-use) the output of the last command. The !! on its own executes the last command. The answer is no. Bash doesn’t allocate any output to any parameter or any block on its memory. Also, you are only allowed to access Bash by its allowed interface operations.
Can You redirect output from one command to another?
You can redirect the returned from a command to input by pipeline, but redirecting printed output to input (1>&0) is nope, at least not for multiple line outputs. Also you won’t want to write a function again and again in each file for the same. So let’s try something else.
How to reuse SqlCommand parameter through every…?
Another way is to use command.Parameters.Clear (); first. Then you can also add the parameter (s) in the loop without creating the same parameter twice. Error is because you are adding the same parameter again and again in each iteration of the loop. I would move that code to a seperate method so that i can call it from multiple places as needed.
How to set Shell exit on error mode?
Use set -e to set exit-on-error mode: if a simple command returns a nonzero status (indicating failure), the shell exits. Beware that set -e doesn’t always kick in. Commands in test positions are allowed to fail (e.g. if failing_command, failing_command || fallback ).
What do the commands in a subshell lead to?
Commands in subshell only lead to exiting the subshell, not the parent: set -e; (false); echo foo displays foo.
How to redirect output from Last Command in Bash?
If so, everything needed to get the last printed line is tail -n 1 [logfile]. Yeah, why type extra lines each time; agreed. You can redirect the returned from a command to input by pipeline, but redirecting printed output to input (1>&0) is nope, at least not for multiple line outputs.
How to automatically capture output of Last Command?
To clarify, I don’t want to assign things manually. What I’m after is something like built-in bash variables, e.g. $_ holds the last argument of the previous command. I want something similar, but with the output of the last command. Seth’s answer has worked quite well. Couple of things to bear in mind: