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About the junos-jseries Package

All junos-jseries software is delivered in signed packages that contain SHA-1 checksums. A package is installed only if the SHA-1 checksum within it matches the SHA-1 hash recorded in its corresponding .sha1 file. (For example, -export.tgz contains -export.tgz and -export.tgz.sha1. The junos-jseries-release-export.tgz package is installed only if the SHA-1 hashes match in the two -export.tgz.sha1 files.)

The junos-jseries package completely reinstalls the software. This package rebuilds the file system but retains configuration files, log files, and similar information from the previous version.

For more information, see the J-series Services Router User Guide.

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