How to expand environment variables from variable names in Python
57974
How to evaluate environment variables into a string in Python?
145357
Variable expansion did not happen in /etc/environment
19369
How can I use $variable in a shell brace expansion of a sequence?
91568
How to correctly escape command arguments from an environment variable
68600
How to permanently set environmental variables
23333
How can I expand a quoted variable to nothing if it's empty?
154472
Can I export a variable to the environment from a bash script without sourcing it?
58648
How to expand variables inside read?
63645
nesting brace expansion and command substitution
139812
Environment variables. Where are they saved in?
21291
Lookup shell variables by name, indirectly
58441
Replace environment variables in a file with their actual values?
145694
How to get the environment variables of a subprocess after it finishes running?
31262
Constructing variable names from a string
69975
Is there an analogue of the Variables command for general expressions?
104821
How do I use a temporary environment variable in a bash for loop?
137387
Which bash will expand  {1..$VAR} in the same way that zsh does