Step 7: Back Up the Currently Running and Active File System
Action
To back up the currently running and active file system so that you can recover to a known, stable environment in case there is a problem during the upgrade, use the following JUNOS CLI operational mode command:
user@host> request system snapshot
Sample Output
user@host> request system snapshot
umount: /altroot: not currently mounted
Copying / to /altroot.. (this may take a few minutes)
umount: /altconfig: not currently mounted
Copying /config to /altconfig.. (this may take a few minutes)
The following filesystems were archived: / /config
What It Means
The root file system is backed up to /altroot, and /config is backed up to /altconfig. The root and /config file systems are on the router's internal flash drive, and the /altroot and /altconfig file systems are on the router's hard drive.
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NOTE: After you issue the |