SIMULATION -
Configure /var/tmp/fstab Permission.
Copy the file /etc/fstab to /var/tmp/fstab. Configure var/tmp/fstab permissions as the following:
Owner of the file /var/tmp/fstab is Root, belongs to group root
File /var/tmp/fstab cannot be executed by any user
User natasha can read and write /var/tmp/fstab
User harry cannot read and write /var/tmp/fstab
All other users (present and future) can read var/tmp/fstab.
To configure the file permissions for /var/tmp/fstab as described, follow these steps: 1. Copy the /etc/fstab file to /var/tmp/fstab using the command cp /etc/fstab /var/tmp/fstab. 2. Change the file owner and group to root using the command chown root:root /var/tmp/fstab. 3. Set the file permissions so that no user can execute it and all users can read it, using the command chmod 644 /var/tmp/fstab. 4. Use ACLs to give natasha read and write permissions: setfacl -m u:natasha:rw- /var/tmp/fstab. 5. Use ACLs to ensure harry has no read or write permissions: setfacl -m u:harry:--- /var/tmp/fstab. After these steps, you can use getfacl /var/tmp/fstab to verify the permissions.
cp /etc/fstab /var/tmp/fstab chown root:root /var/tmp/fstab chmod 770 /var/tmp/fstab setfacl -m u:natasha:rw- /var/tmp/fstab setfacl -m u:harry:rw- /var/tmp/fstab setfacl -m o::r--,m:r /var/tmp/fstab getfacl /var/tmp/fstab
770 or 660 ?
question says all other users can read [r=4 ]
chmod 664 /var/tmp/fstab
harry is not suppose to have rw permissions as per the question. setfacl -m u:harry:--- /var/tmp/fstab
Wouldn't it be chmod 664 /var/tmp/fstab It says all other users should have read access but non should be able to execute??
can not be executed by any user... execute is 1 so 1 is taken from every ugo natasha can read and write ...setfacl -m u:user:rw- /var/tmp/fstab harry cannot read and write ...setacl -m u:user:--- /var/tmp/fstab all other users can write (444)... I dont think this means other as in users,groups,others so setfacl 000 for harry ... if they can write they can read so 666??? idk
sorry for confusion, and write is 222 for write only so read and write is 666
sudo su cp /etc/fstab /var/tmp/fstab chown root:root /var/tmp/fstab chmod oug-x /var/tmp/fstab setfacl -m u:natasha:rw /var/tmp/fstab setfacl -m u:harry:-- /var/tmp/fstab chmod o+r /var/tmp/fstab getfacl /var/tmp/fstab (to verify)
i used chmod o-w to make sure that others has no write access.
The file is a member of the root group and belongs to root. So root(rw) have rw_r_ _ r _ _ It is not executable by anyone. natasha has read and write access. harry has no read or write access. All other users can read the file. cp /etc/fstab /var/tmp/fstab chown root:root /var/tmp/fstab (not requireed) chmod 644 /var/tmp/fstab(rw_r _ _r_ _) setfacl -m u:natasha:rw /var/tmp/fstab setfacl -m u:harry:--- /var/tmp/fstab getfacl /var/tmp/fstab