define variable with scope the following process
Is it in bash scripting possible to define a variable which is scoped to the following process? Something like:
X="123" echo "$X"
Ultimately, I want to do catch the output of some process and write that (with some other surrounding text as well) to some output file:
X=$(...) echo "...$X..." > output_file
In general you're right, you can set variables in the environment of the command:
VAR=value some_command_that_uses_variable_VAR
But be aware of the order of Shell Expansions:
x=123 echo "$x"
the shell will expand $x before it evaluates x=123