OS registry
The OS registry is a database of compatible operating system image files that have been approved by a qualified network specialist for upgrade on a particular VTMOS. The OS Registry may be added to, removed from, and edited.
Note: Best practice for Juniper upgrade: Juniper recommends the
target file system be /var/tmp. Problems may
occur if this practice is not adopted. For example, if TACACS+ is
used for accessing the device, and the user is neither a Superuser nor in a group, the user directory will fill up with data
making it difficult to manage free space on the flash system. The
group must be assigned most, if not all rights. If there is no group
then the user must be provided with read/write permissions.