Slow ssh (sudo) login to linux

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  • Category : Linux

Few steps to check when login operation (or sudo) is successful but takes long time:

  1. check /etc/hosts file (especially, if you have line with 127.0.0.1, and entry with the host itself)
  2. check/change the following option to no in /etc/ssh/sshd_config file
    • GatewayPorts
    • GSSAPIAuthentication
    • UseDNS
  3. restart sshd with systemctl restart sshd
  4. systemctl restart systemd-logind (that can also from time to time stuck)
  5. check free space in your root (log) directory
  6. if system is connected to AD, check network (firewall) blocks

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