I have few mikrotik boxes with old 5.x which dont have check upgrade option
Is there any way I can download the file on mikrotik directly by command ? (so that I dont have to manually upload the file on that box, because usually at my site, my UPLINK is very slow)
yes, you can, execute this in the terminal
this is the 6.18 for mipsbe hardware:
/tool fetch mode=http url=http://download2.mikrotik.com/routeros/6.18/routeros-mipsbe-6.18.npk
you can go to mikrotik website and copy the url to the npk and replace the url in the command.
Great Thank you 