ssh: Could not resolve hostname : hostname nor servname provided, or not known

[djkerya]

ssh: Could not resolve hostname : hostname nor servname provided, or not known
ssh: Could not resolve hostname : hostname nor servname provided, or not known
ERR: cannot establish ssh-connection

[akokarev]

Check ping to hostname, check dns server. Use IP address, not hostname/domain name. This problem is not with script.

[tenhishadow]

from example.conf:

mbkp/example.cfg

Line 7 in 15fdaf7

#### Connection ####################################

@djkerya please just configure your devices using ssh config file like described here:
https://www.digitalocean.com/community/tutorials/how-to-configure-custom-connection-options-for-your-ssh-client
idea is that script just use ssh and you configure ssh outside the script using this approach.

I configure it like this:

# gw jump
host mikrotik1
  User backup_user
  Hostname 1.1.1.1
  IdentityFile ~/.ssh/mykey

# ap
host mikrotik-ap1
  User backup_user
  Hostname 192.168.88.2
  ProxyJump mikrotik1 # use gw as an entrypoint
  IdentityFile ~/.ssh/mykey

This is an advanced usage that could cover any cases
basically you could read it using man:

man ssh
man ssh_config