envsubst: move to common/

pages/linux/envsubst.md

@@ -1,20 +0,0 @@
-# envsubst
-
-> Substitutes shell format strings with environment variables in text.
-> Strings to be replaced should be in either `${var}` or `$var` format.
-
-- Replace environment variables in stdin and output to stdout:
-
-`echo '{{$HOME}}' | envsubst`
-
-- Replace environment variables in an input file and output to stdout:
-
-`envsubst < {{path/to/input}}`
-
-- Replace environment variables in an input file and output to a file:
-
-`envsubst < {{path/to/input}} > {{path/to/output}}`
-
-- Replace environment variables in input from a space-separated list:
-
-`envsubst {{variables}} < {{path/to/input}}`