ssh fingerprint remover

web/ssh-remove-known-host

@@ -0,0 +1,32 @@
+#!/bin/bash
+
+function helpexit() {
+    echo "Remove hosts from ~/.ssh/known_hosts"
+    echo "-f  no questions."
+    exit
+}
+
+for (( i=1; i<=$#; i++ )); do
+  [[ "${!i}" = "--help" ]] && helpexit                                            
+  [[ "${!i}" = "-h" ]] && helpexit                                            
+  [[ "${!i}" = "-f" ]] && { FORCE=1; continue; }
+  HOST="${!i}"
+done
+[[ -z "$HOST" ]] && helpexit
+
+HOST=$( ssh -G "$HOST" | awk '/^hostname / { print $2 }' )
+IP=$( getent hosts "$HOST" | awk '{ print $1 }' )
+
+[[ "$FORCE" -ne 1 ]] && {
+  echo "Sure to remove $HOST (IP: $IP) from known_hosts? [y/N]"
+  read resp
+} || {
+  resp=y
+}
+
+[[ "$resp" = "y" ]] && {
+  set -x
+  ssh-keygen -R "$HOST"
+  ssh-keygen -R "$IP"
+}
+