The export builtin command¶
Synopsis¶
export [-fn] [NAME[=VALUE] ...]
export -p
Description¶
The export
builtin command is used to mark variables or functions referenced by NAME
for automatic export to the environment. If NAME
is a shell variable, a value VALUE
can be assigned before exporting it.
Options¶
Option | Description |
---|---|
-f | refer to shell functions |
-n | remove the export property from any referenced NAME |
-p | print all exported variables, with -f , print all exported functions - all in a format re-usable as input |
An argument of --
disables further option processing.
Return status¶
Status | Reason |
---|---|
0 | no error |
!=0 | invalid option |
!=0 | a given NAME is invalid |
Examples¶
Set the display to use when launching a GUI application (useful during SSH sessions):
export DISPLAY=":0"
Set your default text editor (e.g. SublimeText):
export EDITOR=subl
Portability considerations¶
- in POSIX®, only the
-p
option is specified - in POSIX®, only variables (with value assignment) are to be exported, not shell functions