Solaris wtmpx not updating dentures dating
Removing the write permissions for a group only makes the file more secure when you have group members...
/var/log/utmp and /var/log/wtmp have their permissions and groups set in at least two places on Red Hat 5.4: 1.
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Click Here to receive this Complete Guide absolutely free.*******Red Hat Enterprise Server 4******* From what I've read, the permissions for /var/log/wtmp need to be changed from the default 664 to a more secure 644.
/etc/sets the permissions and ownership to 664 root utmp. /etc/rc.d/rc.sysinit sets the permissions and ownership of /var/run/utmp and /var/log/wtmp to 0664 root:utmp respectively.
I believe these files have utmp ownership so they can be modified by /usr/libexec/utempter/utempter which has permissions 2711, i.e. That SGID bit allows all users to act with as if they belong to utmp.