如何修改主机名和重置SSH

虚拟机下常用功能

一、修改主机名称:

# hostnamectl set-hostname HostA
# vi /etc/hosts
# vi /etc/network/interfaces
# vi /etc/resolv.conf

二、重新生成SSH主机KEY:

# rm -v /etc/ssh/ssh_host_*
# dpkg-reconfigure openssh-server

三、更新系统:

# apt update
# apt upgrade

四、删除某个 systemd 服务

# systemctl stop [servicename] # systemctl disable [servicename] # rm /etc/systemd/system/[servicename] # rm /etc/systemd/system/[servicename] # and symlinks that might be related # rm /usr/lib/systemd/system/[servicename] # rm /usr/lib/systemd/system/[servicename] # and symlinks that might be related # systemctl daemon-reload # systemctl reset-failed

https://superuser.com/questions/513159/how-to-remove-systemd-services

五、彻底删除某应用

# sudo apt autoremove --purge [applicationname]

https://howtoinstall.co/en/debian/wheezy/bind9?action=remove

六、清除 BASH 历史

cat /dev/null > ~/.bash_history && history -c && exit

四、阿里云主机IP的设置:

# cd /etc/systemd/network
# ls