Very Computer

Quote:>I'm a H.S. teacher faced with a Decstation 5000, responsibilities
>as administrator, and no training workshop!

>Question 1: How do I limit the amount of disk space each user has on
>my system? Our hard drive is 95% full and I'd like to encourage a
>little more discipline on erasing unnecessary files.

See man quota.  Use quotaon to enable quotas.

Quote:>Question 2: How do I limit access to the su command? One manual
>suggests only members of the "wheel" group have this access, but this
>group does not exist in my /etc/group file.

Ultrix does not use the wheel group.  You must keep the root password
secret.  Good luck.

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Paul Lustgraaf            "It's easier to apologize than to get permission."
Network Specialist                                     Grace Hopper

Ames, IA  50011                                                 515-294-0324

I'm a H.S. teacher faced with a Decstation 5000, responsibilities
as administrator, and no training workshop!

Question 1: How do I limit the amount of disk space each user has on
my system? Our hard drive is 95% full and I'd like to encourage a
little more discipline on erasing unnecessary files.

Question 2: How do I limit access to the su command? One manual
suggests only members of the "wheel" group have this access, but this
group does not exist in my /etc/group file.

Quote:>Question 1: How do I limit the amount of disk space each user has on
>my system? Our hard drive is 95% full and I'd like to encourage a
>little more discipline on erasing unnecessary files.

If I recall correctly.

In at the top of the file system where you want to enable
quotas:

1.  Create a file called quota.

        # cd /usr/users
        # touch quota

2.  Run quota check for the file system.

        # quotacheck /usr/users

3.  Change the "rw" entry for the file system in /etc/fstab
    to "rq".

4.  Use quotaon to enable quotas.

5.  Use edquota to set the quotas you want.  I don't recall if there
    is an easy way to set the quota for a large number of users.

Quote:

>Question 2: How do I limit access to the su command? One manual
>suggests only members of the "wheel" group have this access, but this
>group does not exist in my /etc/group file.

I think a "recent" Berkeley version of su supported checking for
membership in group "wheel".  The ULTRIX version of su doesn't
do this.  But you can create a group (or use an existing one)
and make the people to whom you want to allow running su members
of that group.  Then change the permissions of su so that it
can only be executed by root the members of that group:

        # chgrp wheel `which su`
        # chmod 4750 `which su`

The wheel entry in /etc/group might look like:

wheel:*:3:root,user,user,...

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