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FreeBSD Prevent Users From Seeing Information About Processes Owned by Other Users

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By default, on FreeBSD, users can see information about processes owned by other users by running the ps command. However, you can prevent users from seeing this information by enabling the security.bsd.see_other_uids sysctl option.

Here are the steps to prevent users from seeing information about processes owned by other users on FreeBSD:

  1. Log in as the root user or switch to the root user using the su command.
  2. Type the following command to enable the security.bsd.see_other_uids sysctl option:
sysctl security.bsd.see_other_uids=0

This command sets the value of the security.bsd.see_other_uids option to 0, which disables the ability of non-root users to see information about processes owned by other users.

  1. To make this change permanent, you will need to add the following line to the /etc/sysctl.conf file:
security.bsd.see_other_uids=0

This will ensure that the security.bsd.see_other_uids option is set to 0 every time the system boots up.

  1. Save and close the /etc/sysctl.conf file.
rnThat's it! You have prevented users from seeing information about processes owned by other users on FreeBSD by enabling the security.bsd.see_other_uids sysctl option. Note that this will affect all users on the system except for the root user.