Recreate the /tmp directory on its own partition   IMPORTANT NOTE:  This document is based on CentOS, RedHat Linux 7.3 and Enterprise.  The concepts should be similar across operating systems, but the commands will very likely be different.  Also, never assume the directory structures exist in your system as written in the document.  Never blindly follow security instructions -- read, review, compare, apply as it fits your system. Log onto the server as root: Is the /tmp directory in its own partition? Do a “df –k” Do you see a /tmp partition?  If YES, then move to step B; otherwise move to step C. Modify etc fstab to change the definition for /tmp Change “defaults” to “rw,nosuid,noexec” and save etc fstab Save the file, and execute the following command: mount -oremount loop,rw,nosuid,noexec /tmp Skip to step E The following will create a 100 MB /tmp directory on its own partition with noexec and nosuid. IMPORTANT:On CentOS and RedHat Enterprise 4.x, use /var or another partition with a large amount of free space rather than /dev as CentOS 4.x recreates the /dev partition every time the server reboots; also, CentOS 4.x and RedHat Enterprise 4.x, do not use the "loop" parameter above. cd /dev/ dd if=/dev/zero of=Tmp bs=1024 count=100000 mkfs -t ext3 /dev/Tmp cd / cp -aR  /tmp  /tmp_backup mount  -o  loop,noexec,nosuid,rw  /dev/Tmp  /tmp cp -aR /tmp_backup/* /tmp/ chmod 0777 /tmp chmod +t  /tmp Modify etc fstab to add the definition for /tmp /dev/Tmp          /tmp          ext3          loop,rw,nosuid,noexec     0 0 Link /var/tmp to /tmp cd /var Verify /var/tmp is empty rm -fR /var/tmp ln -s /tmp /var/tmp NOTES: The  etc fstab entry means it will be mounted automatically on boot up. nosuid, noexec are to help protect against hackers putting root kits in /tmp and building / executing them IMPORTANT NOTE:  This document and all linked document is being provided as a good will gesture to the Parallels H-Sphere community and to others who may benefit from its use.  Dynamic Net, Inc. makes no representations implied or explicit as to their value or warranty. Dynamic Net, Inc. will not be held liable for any damage resulting in the application of the steps and procedures noted.  If you feel uncomfortable at all about doing any of the steps, make a complete system backup and hire a third party like We Manage Servers to do the work for you.