$ ssh [email protected]BusyBox v1.30.0 () built-in shell (ash)-----------------------------------------------------
OpenWrt SNAPSHOT, r9028-75fdf3b
-----------------------------------------------------
=== WARNING! =====================================There is no root password defined on this device!
Use the \"passwd\"command to set up a new password
in order to prevent unauthorized SSH logins.
--------------------------------------------------
root@OpenWrt:~# ls
luci_0.11.1-1_ar71xx.ipk
luci_git-19.011.54896-1f423b1-1_all.ipk
openwrt-ramips-mt7621-mikrotik_rb750gr3-squashfs-sysupgrade.bin
root
root@OpenWrt:~# sysupgrade -v openwrt-ramips-mt7621-mikrotik_rb750gr3-squashfs-s
ysupgrade.bin
Image not in /tmp, copying...
Cannot save config while running from ramdisk.
Commencing upgrade. Closing all shell sessions.
Connection to 192.168.1.1 closed by remote host.
Connection to 192.168.1.1 closed.