Follow these steps to install the software via the CLI from a USB stick:

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1. Download the Junos upgrade file to the USB stick.  

2. Locate the USB device ID that Junos is associating to the USB stick: 

   user@srx> start shell
user@srx% ls /dev/
   

3. Insert the USB device into the USB slot.  For example, slot 0 would return the following:

   root# umass0: USB USBFlashDrive, rev 2.00/1.00, addr 2
da0 at umass-sim0 bus 0 target 0 lun 0
da0: Removable Direct Access SCSI-0 device
da0: 1.000MB/s transfers
da0: 980MB (2007040 512 byte sectors: 64H 32S/T 980C)

   Run the following command
   
   user@srx% ls /dev/
   
   Locate difference in outputs to locate drive label. (It will usually be da#s1, i.e. da0s1)
   

4. Create a mount directory:

   user@srx% mkdir /tmp/usb

5. Mount the USB to the directory:

   user@srx% mount -t msdosfs /dev/ /tmp/usb

   Example:
   user@srx% mount -t msdosfs /dev/da0s1 /tmp/usb (there is a space between the label name and /tmp)
   
   Verify that the USB is mounted to the device:
   root@% pwd
/cf/root
root@% cd /tmp/usb/
root@% pwd
/cf/tmp/usb
root@% ls
junos-jsr-11.4R5.7-export.tgz 


6. Exit shell and install the software:

   user@srx% exit
user@srx> request system software add /tmp/usb/ no-validate no-copy

   For additional details regarding a software installation, refer to the instructions at Installing the Software.

7. Upon completion, reboot the SRX:

   user@srx> request system reboot

分享题目：SRXJunos系统安装更新之一（U盘安装）
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