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:
el@apollo:~$ env | grep DUALCASE
el@apollo:~$ click below button to copy the code. By - Linux tutorial - team
It does not, so create the variable and export it:
el@apollo:~$ DUALCASE=1
el@apollo:~$ export DUALCASEclick below button to copy the code. By - Linux tutorial - team
Check if it is there:
el@apollo:~$ env | grep DUALCASE
DUALCASE=1click below button to copy the code. By - Linux tutorial - team
el@apollo:~$ unset DUALCASEclick below button to copy the code. By - Linux tutorial - team
Check if it's still there:
el@apollo:~$ env | grep DUALCASE
el@apollo:~$ 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:
el@apollo:~$ CAN="wikitechy"
el@apollo:~$ set | grep CAN
CAN='wikitechy'
el@apollo:~$ env | grep CAN
el@apollo:~$
el@apollo:~$ exec bash
el@apollo:~$ set | grep CAN
el@apollo:~$ env | grep CAN
el@apollo:~$click below button to copy the code. By - Linux tutorial - team
exec bash command cleared all the local variables but not environment variables.
Unset all environment variables back to default on login:
el@apollo:~$ export DOGE="welcome to wikitechy"
el@apollo:~$ env | grep DOGE
DOGE=welcome to wikitechy
el@apollo:~$ env -i bash
el@apollo:~$ env | grep DOGE
el@apollo:~$click below button to copy the code. By - Linux tutorial - team
env -i bash command cleared all the environment variables to default on login.