This article is very important in webhosting technical management. Read this for brief understanding about the “/tmp” directory. The “/tmp” directory is a special directory that is required to be writeable by all users and processes on the system located in web hosting directory. In general, directories that are writable by all users and processes are cause for security concern, however this directory is a special case. To minimize any security impact as a result of having an unsecured “/tmp” directory, it is recommended that “/tmp” be mounted on a seperate partition in order to take advantage of the “no exec” option available under both Linux and FreeBSD. If a separate mount point exists for “/tmp”, then the web hosting installer will verify and potentially remount the partition with the “no exec” option. Additionally, the installer will ensure that the sticky bit is set on the directory and that the other permissions are correct. If “/tmp” is not mounted on a separate partition, the installer will create a file system disk image of 512 Mb and mount “/tmp” on the newly created disk image with the “no exec” directive. Under most circumstances, 512 Mb is sufficient for the “/tmp” partition; however, your system may require additional space. It is therefore recommended that you include a separate partition for the “/tmp” mount point (sized according to your size specification) prior to installing cPanel.
cPanel should only be installed on a blank server with a fresh operating system install. cPanel makes many changes to your system including downloading needed packages and configuring them for you. Because of the considerable amount of changes that cPanel will make to the system, the suggested method of uninstalling the cPanel software is to reformat the server. The hostname of this server should be a Fully Qualified Domain Name that will not be used elsewhere on the server. You should never set your hostname to an name that is already used (www, ftp, mail, etc) or to the name of an account on the server (www.domain.com).