linux - [Solved-2 Solutions] How to delete (unset) an exported environment variable ? - ubuntu - red hat - debian - linux server - linux pc
Linux - Problem :
How to delete (unset) an exported environment variable ?
Linux - Solution 1:
unset GNUPLOT_DRIVER_DIRclick below button to copy the code. By - Linux tutorial - team
Linux - Solution 2:
Creating and deleting an environment variable in bash:
Test if the DUALCASE variable exists:
[email protected]:~$ env | grep DUALCASE
[email protected]:~$ click below button to copy the code. By - Linux tutorial - team
It does not, so create the variable and export it:
[email protected]:~$ DUALCASE=1
[email protected]:~$ export DUALCASEclick below button to copy the code. By - Linux tutorial - team
Check if it is there:
[email protected]:~$ env | grep DUALCASE
DUALCASE=1click below button to copy the code. By - Linux tutorial - team
[email protected]:~$ unset DUALCASEclick below button to copy the code. By - Linux tutorial - team
Check if it's still there:
[email protected]:~$ env | grep DUALCASE
[email protected]:~$ click below button to copy the code. By - Linux tutorial - team
The DUALCASE exported environment variable is deleted.
Extra commands to help clear your local and environment variables:
Unset all local variables back to default on login:
[email protected]:~$ CAN="wikitechy"
[email protected]:~$ set | grep CAN
CAN='wikitechy'
[email protected]:~$ env | grep CAN
[email protected]:~$
[email protected]:~$ exec bash
[email protected]:~$ set | grep CAN
[email protected]:~$ env | grep CAN
[email protected]:~$click below button to copy the code. By - Linux tutorial - team
exec bash command cleared all the local variables but not environment variables.
Unset all environment variables back to default on login:
[email protected]:~$ export DOGE="welcome to wikitechy"
[email protected]:~$ env | grep DOGE
DOGE=welcome to wikitechy
[email protected]:~$ env -i bash
[email protected]:~$ env | grep DOGE
[email protected]:~$click below button to copy the code. By - Linux tutorial - team
env -i bash command cleared all the environment variables to default on login.