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To update environment variable of a running process
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| $> sudo apt-get install gdb | |
| $> sudo su | |
| $> gdb | |
| (gdb) attach process_id # insert process id instead of process_id | |
| (gdb) call putenv ("env_var_name=env_var_value") # Add environmental variable | |
| (gdb) detach # detach with option y |
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