software upgrade ACX5k ( + jweb )

root@ACX5048-1> request system software validate /var/tmp/jinstall-host-acx5k-18.2R1.9-signed.tgz

{master:0}
root@ACX5048-1> request system software validate /var/tmp/jinstall-host-acx5k-18.2R1.9-signed.tgz ?
Possible completions:
  <[Enter]>            Execute this command
  member               Validate package on member (0..9)
+ upgrade-with-config  Additional configs ('text/xml' format) to be validated
  upgrade-with-config-format
  |                    Pipe through a command
{master:0}
root@ACX5048-1> request system software add /var/tmp/jinstall-host-acx5k-18.2R1.9-signed.tgz
Verified jinstall-vjunos-18.2R1.9.tgz signed by PackageDevelopmentRSA_2015
Adding vjunos...
Saving contents of boot area prior to installation

WARNING:     This package will load JUNOS 18.2R1.9 software.
WARNING:     It will save JUNOS configuration files, and SSH keys
WARNING:     (if configured), but erase all other files and information
WARNING:     stored on this machine.  It will attempt to preserve dumps
WARNING:     and log files, but this can not be guaranteed.  This is the
WARNING:     pre-installation stage and all the software is loaded when
WARNING:     you reboot the system.

POST-INSTALL...
Saving the config files ...
NOTICE: uncommitted changes have been saved in /var/db/config/juniper.conf.pre-install
Pushing installation package to host...
Upgrade Host OS to 18.2R1.9...
./jinstall-acx5k-18.2R1.9.img.gz: OK
/boot/boot
Extracting image...
Host upgrade staging completed. Need reboot to complete upgrade installation.
WARNING: Changing next boot to SSD0
WARNING: Changing boot device enable from  0x3F to 0x3F
Install jinstall-vjunos completed

WARNING:     A REBOOT IS REQUIRED TO LOAD THIS SOFTWARE CORRECTLY. Use the
WARNING:     'request system reboot' command when software installation is
WARNING:     complete. To abort the installation, do not reboot your system,
WARNING:     instead use the 'request system software delete jinstall'
WARNING:     command as soon as this operation completes.

Saving state for rollback ...

{master:0}
root@ACX5048-1> request system treboo
                               ^
syntax error, expecting <command>.
root@ACX5048-1> request system reboot ?
Possible completions:
  <[Enter]>            Execute this command
  all-members          Reboot all virtual chassis members
  at                   Time at which to perform the operation
  both-routing-engines  Reboot both the Routing Engines
  hypervisor           Reboot both Junos and Hypervisor
  in                   Number of minutes to delay before operation
  local                Reboot local virtual chassis member
  media                Boot media for next boot
  member               Reboot specific virtual chassis member (0..9)
  message              Message to display to all users
  other-routing-engine  Reboot the other Routing Engine
  |                    Pipe through a command
{master:0}
root@ACX5048-1> request system reboot
Reboot the system ? [yes,no] (no) yes

Shutdown at Wed Sep 26 13:56:20 2018.
[pid 3570]

{master:0}
root@ACX5048-1>
*** System shutdown message from root@ACX5048-1 ***

System going down in 1 minute