#!/bin/bash # A simple shell script to clean (delete) ~/.known_hosts file hostname entry. # This is useful when remote server reinstalled or ssh keys are changed! # ------------------------------------------------------------------------- # Copyright (c) 2007 nixCraft project <http://cyberciti.biz/fb/> # This script is licensed under GNU GPL version 2.0 or above # ------------------------------------------------------------------------- # This script is part of nixCraft shell script collection (NSSC) # Visit http://bash.cyberciti.biz/ for more information. # ------------------------------------------------------------------------- host="$1" [[ $# -eq 0 ]] && { echo "Usage: $0 host.name.com"; exit 1;} ips=$(host "$host" | awk -F'address' '{ print $2}' | sed -e 's/^ //g') ssh-keygen -R "$host" for i in $ips do ssh-keygen -R "$i" done
How Do I Use This Script?
Simply run it as follows:
./script.sh www-03.nixcraft.net.in
Get the latest tutorials on SysAdmin, Linux/Unix, Open Source, and DevOps topics:
- RSS feed or Weekly email newsletter
- Share on Twitter • Facebook • 1 comment... add one ↓
Category | List of Unix and Linux commands |
---|---|
File Management | cat |
Firewall | Alpine Awall • CentOS 8 • OpenSUSE • RHEL 8 • Ubuntu 16.04 • Ubuntu 18.04 • Ubuntu 20.04 |
Network Utilities | dig • host • ip • nmap |
OpenVPN | CentOS 7 • CentOS 8 • Debian 10 • Debian 8/9 • Ubuntu 18.04 • Ubuntu 20.04 |
Package Manager | apk • apt |
Processes Management | bg • chroot • cron • disown • fg • jobs • killall • kill • pidof • pstree • pwdx • time |
Searching | grep • whereis • which |
User Information | groups • id • lastcomm • last • lid/libuser-lid • logname • members • users • whoami • who • w |
WireGuard VPN | Alpine • CentOS 8 • Debian 10 • Firewall • Ubuntu 20.04 |
ips=$(host “$host” | awk -F’address’ ‘{ print $2}’ | sed -e ‘s/^ //g’)
could be shorten to: ips=$(host “$host” | awk ‘/address/ { print $NF }’)