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I was trying to setup a ssh connection to my pi 2 (model B, i.e., no inbuilt wifi) in headless mode from my ubuntu machine. I do not have a router. After multiple attempts of flashing and tweaking, the following worked,

  1. Add ssh file in /boot
  2. Uncommenting the following lines in /etc/dhcpcd.conf
profile static_eth0
static ip_address=192.168.1.23/24
static routers=192.168.1.1
static domain_name_servers=192.168.1.1

interface eth0
fallback static_eth0

After this it asks for

pi@192.168.1.23's password:

to which i supplied the default password for rpi

raspberry

but it keeps saying Permission denied, please try again.for three times after which it closes the connection. I tried this and this, but it would not work. Note that I do not have a windows machine or a hdmi-in enabled screen. I don't remember having this problem in earlier versions of raspbian. I am using 2018-11-13-raspbian-stretch-full.img.

  • @Milliways I connected my rpi to my laptop via an ethernet cable after adding the empty ssh file in /boot/. However, I was not able to establish a ssh connection via the command $ssh pi@raspberrypi as it would say Could not resolve hostname raspberrypi: Name or service not known. After making a static IP in /etc/dhcpcd.conf I was able to connect but now I think I am not getting access to the default user, hence it's not accepting the default password. – Devarshi Jan 10 at 9:08
  • You do not put ssh in /boot but into the boot partition. You should use raspberrypi.local in most OS. See How to set up networking/WiFi – Milliways Jan 10 at 9:13
  • @Milliways sorry, my bad. I put ssh into the boot partition only after flashing the image file. And I tried both $ssh pi@raspberrypi and $ssh pi@raspberrypi.local. Since this problem did not occur before when I used this with windows + putty, I assumed it has something to do with the DHCP connection on my laptop hence I gave it a static IP. I dont know much about DHCP hence I avoid it :p – Devarshi Jan 10 at 9:20
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    try running ssh -vvv as this will give more verbose output which help work out why permission is denied. You can disable passwords in sshd_config. – fcbsd Jan 10 at 9:45
  • @Milliways I reflashed the os added the file and restarted my computer. It worked with $ssh pi@raspberrypi.local and it started working fine with it. I think the problem was with my ubuntu machine dhcp earlier. Thanks! – Devarshi Jan 10 at 11:54
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When I did,

$ssh pi@192.168.1.23

after making my IP static, pi gave the following,

pi@192.168.1.23's password:

Which was misleading, as no user 192.168.1.23 exists. Hence it kept showing Permission Denied. It would ask passwords for this user, even when I had disabled passwords.

Finally, after restarting my computer and re-flashing the OS on the SD card, I was able to get it working without static IP. And the standard command worked,

$ssh pi@raspberrypi.local

I figured that DHCP must have been misbehaving on my computer as I kept switching my ethernet port from RPI to LAN. After restarting it must have got reset.

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