modify hostname

发表于   |   分类于   |  

modify hostname

  • uname -a 查看hostname
  • hostname xxxxx 修改下，让hostname立刻生效。
  • vi /etc/hosts 修改原hostname为 xxxxx
  • vi /etc/sysconfig/network 修改原hostname为 xxxxx,这样可以让reboot重启后也生效
  • reboot重启，uname -a 重新检查下。收工

reverse mapping checking getaddrinfo POSSIBLE BREAK-IN ATTEMPT

Resolution

  • Setup a Reverse DNS Record (aka PTR Record) for the SSH client
  • Ensure UseDNS no and GSSAPIAuthentication no are set in /etc/ssh/sshd_config on the SSH server, then restart the sshd
  • Confirm that /etc/hosts on the SSH server has an entry for the SSH client IP address and hostname