$EGID  –  Effective Group ID

$EGID contains the effective group ID of the shell process.

With the sufficient permissions, a change to this variable will change the effective group ID of the shell process. Use a subshell to launch a command with a different effective group ID: (EGID=0; command).

Links

• The Z Shell manual

Examples

Change effective group ID of the shell process to 0 without sufficient permissions

1

EGID=0

Output:

1	zsh: failed to change effective group ID: permission denied