diff --git a/README.md b/README.md
index 033711f3..6a1cf3a4 100644
--- a/README.md
+++ b/README.md
@@ -330,6 +330,7 @@ You don't have to do anything manually!
 1. MyDNS.JP API (https://www.mydns.jp/)
 1. hosting.de (https://www.hosting.de)
 1. Neodigit.net API (https://www.neodigit.net)
+1. Exoscale.com API (https://www.exoscale.com/)
 
 And:
 
diff --git a/acme.sh b/acme.sh
index 6264da01..acda4bee 100755
--- a/acme.sh
+++ b/acme.sh
@@ -37,6 +37,7 @@ VTYPE_HTTP="http-01"
 VTYPE_DNS="dns-01"
 VTYPE_TLS="tls-sni-01"
 VTYPE_TLS2="tls-sni-02"
+VTYPE_ALPN="tls-alpn-01"
 
 LOCAL_ANY_ADDRESS="0.0.0.0"
 
@@ -48,6 +49,7 @@ NO_VALUE="no"
 
 W_TLS="tls"
 W_DNS="dns"
+W_ALPN="alpn"
 DNS_ALIAS_PREFIX="="
 
 MODE_STATELESS="stateless"
@@ -1046,7 +1048,7 @@ _idn() {
   fi
 }
 
-#_createcsr  cn  san_list  keyfile csrfile conf
+#_createcsr  cn  san_list  keyfile csrfile conf acmeValidationv1
 _createcsr() {
   _debug _createcsr
   domain="$1"
@@ -1054,6 +1056,7 @@ _createcsr() {
   csrkey="$3"
   csr="$4"
   csrconf="$5"
+  acmeValidationv1="$6"
   _debug2 domain "$domain"
   _debug2 domainlist "$domainlist"
   _debug2 csrkey "$csrkey"
@@ -1062,7 +1065,9 @@ _createcsr() {
 
   printf "[ req_distinguished_name ]\n[ req ]\ndistinguished_name = req_distinguished_name\nreq_extensions = v3_req\n[ v3_req ]\n\nkeyUsage = nonRepudiation, digitalSignature, keyEncipherment" >"$csrconf"
 
-  if [ -z "$domainlist" ] || [ "$domainlist" = "$NO_VALUE" ]; then
+  if [ "$acmeValidationv1" ]; then
+    printf -- "\nsubjectAltName=DNS:$domainlist" >>"$csrconf"
+  elif [ -z "$domainlist" ] || [ "$domainlist" = "$NO_VALUE" ]; then
     #single domain
     _info "Single domain" "$domain"
     printf -- "\nsubjectAltName=DNS:$domain" >>"$csrconf"
@@ -1084,6 +1089,10 @@ _createcsr() {
     printf -- "\nbasicConstraints = CA:FALSE\n1.3.6.1.5.5.7.1.24=DER:30:03:02:01:05" >>"$csrconf"
   fi
 
+  if [ "$acmeValidationv1" ]; then
+    printf "\n1.3.6.1.5.5.7.1.30.1=critical,DER:04:20:${acmeValidationv1}" >>"${csrconf}"
+  fi
+
   _csr_cn="$(_idn "$domain")"
   _debug2 _csr_cn "$_csr_cn"
   if _contains "$(uname -a)" "MINGW"; then
@@ -2107,7 +2116,7 @@ _sleep() {
   fi
 }
 
-# _starttlsserver  san_a  san_b port content _ncaddr
+# _starttlsserver  san_a  san_b port content _ncaddr acmeValidationv1
 _starttlsserver() {
   _info "Starting tls server."
   san_a="$1"
@@ -2115,10 +2124,12 @@ _starttlsserver() {
   port="$3"
   content="$4"
   opaddr="$5"
+  acmeValidationv1="$6"
 
   _debug san_a "$san_a"
   _debug san_b "$san_b"
   _debug port "$port"
+  _debug acmeValidationv1 "$acmeValidationv1"
 
   #create key TLS_KEY
   if ! _createkey "2048" "$TLS_KEY"; then
@@ -2131,7 +2142,7 @@ _starttlsserver() {
   if [ "$san_b" ]; then
     alt="$alt,$san_b"
   fi
-  if ! _createcsr "tls.acme.sh" "$alt" "$TLS_KEY" "$TLS_CSR" "$TLS_CONF"; then
+  if ! _createcsr "tls.acme.sh" "$alt" "$TLS_KEY" "$TLS_CSR" "$TLS_CONF" "$acmeValidationv1"; then
     _err "Create tls validation csr error."
     return 1
   fi
@@ -2157,6 +2168,10 @@ _starttlsserver() {
     __S_OPENSSL="$__S_OPENSSL -6"
   fi
 
+  if [ "$acmeValidationv1" ]; then
+    __S_OPENSSL="$__S_OPENSSL -alpn acme-tls/1"
+  fi
+
   _debug "$__S_OPENSSL"
   if [ "$DEBUG" ] && [ "$DEBUG" -ge "2" ]; then
     $__S_OPENSSL -tlsextdebug &
@@ -3067,8 +3082,8 @@ _on_before_issue() {
         _savedomainconf "Le_HTTPPort" "$Le_HTTPPort"
       fi
       _checkport="$Le_HTTPPort"
-    elif [ "$_currentRoot" = "$W_TLS" ]; then
-      _info "Standalone tls mode."
+    elif [ "$_currentRoot" = "$W_TLS" ] || [ "$_currentRoot" = "$W_ALPN" ]; then
+      _info "Standalone tls/alpn mode."
       if [ -z "$Le_TLSPort" ]; then
         Le_TLSPort=443
       else
@@ -3694,6 +3709,10 @@ $_authorizations_map"
         fi
       fi
 
+      if [ "$_currentRoot" = "$W_ALPN" ]; then
+        vtype="$VTYPE_ALPN"
+      fi
+
       if [ "$ACME_VERSION" = "2" ]; then
         response="$(echo "$_authorizations_map" | grep "^$d," | sed "s/$d,//")"
         _debug2 "response" "$response"
@@ -4007,6 +4026,16 @@ $_authorizations_map"
         _on_issue_err "$_post_hook" "$vlist"
         return 1
       fi
+    elif [ "$vtype" = "$VTYPE_ALPN" ]; then
+      acmevalidationv1="$(printf "%s" "$keyauthorization" | _digest "sha256" "hex")"
+      _debug acmevalidationv1 "$acmevalidationv1"
+      if ! _starttlsserver "$d" "" "$Le_TLSPort" "$keyauthorization" "$_ncaddr" "$acmevalidationv1"; then
+        _err "Start tls server error."
+        _clearupwebbroot "$_currentRoot" "$removelevel" "$token"
+        _clearup
+        _on_issue_err "$_post_hook" "$vlist"
+        return 1
+      fi
     fi
 
     if ! __trigger_validation "$uri" "$keyauthorization"; then
@@ -5469,6 +5498,7 @@ Parameters:
   --output-insecure                 Output all the sensitive messages. By default all the credentials/sensitive messages are hidden from the output/debug/log for secure.
   --webroot, -w  /path/to/webroot   Specifies the web root folder for web root mode.
   --standalone                      Use standalone mode.
+  --alpn                            Use standalone alpn mode.
   --stateless                       Use stateless mode, see: $_STATELESS_WIKI
   --apache                          Use apache mode.
   --dns [dns_cf|dns_dp|dns_cx|/path/to/api/file]   Use dns mode or dns api.
@@ -5499,6 +5529,7 @@ Parameters:
   --accountkey                      Specifies the account key path, only valid for the '--install' command.
   --days                            Specifies the days to renew the cert when using '--issue' command. The max value is $MAX_RENEW days.
   --httpport                        Specifies the standalone listening port. Only valid if the server is behind a reverse proxy or load balancer.
+  --tlsport                         Specifies the standalone tls listening port. Only valid if the server is behind a reverse proxy or load balancer.
   --local-address                   Specifies the standalone/tls server listening address, in case you have multiple ip addresses.
   --listraw                         Only used for '--list' command, list the certs in raw format.
   --stopRenewOnError, -se           Only valid for '--renew-all' command. Stop if one cert has error in renewal.
@@ -5823,6 +5854,14 @@ _process() {
           _webroot="$_webroot,$wvalue"
         fi
         ;;
+      --alpn)
+        wvalue="$W_ALPN"
+        if [ -z "$_webroot" ]; then
+          _webroot="$wvalue"
+        else
+          _webroot="$_webroot,$wvalue"
+        fi
+        ;;
       --stateless)
         wvalue="$MODE_STATELESS"
         if [ -z "$_webroot" ]; then
@@ -5947,6 +5986,11 @@ _process() {
         Le_HTTPPort="$_httpport"
         shift
         ;;
+      --tlsport)
+        _tlsport="$2"
+        Le_TLSPort="$_tlsport"
+        shift
+        ;;
       --listraw)
         _listraw="raw"
         ;;
diff --git a/dnsapi/README.md b/dnsapi/README.md
index 30c1be53..201deeec 100644
--- a/dnsapi/README.md
+++ b/dnsapi/README.md
@@ -267,25 +267,26 @@ when needed.
 
 ## 14. Use Linode domain API
 
-First you need to login to your Linode account to get your API Key.
+The tokens created in the classic manager and cloud manager are incompatible
+with one another. While the classic manager makes an all or nothing API, the
+newer cloud manager interface promises to produce API keys with a finer
+permission system. However, either way works just fine.
 
-  * [Classic Manager](https://manager.linode.com/profile/api)
+### Classic Manager ###
 
-   Under "Add an API key", Give the new key a "Label" (we recommend *ACME*),
-   set the expiry to never, "Create API Key", and copy the new key into the `LINODE_API_KEY` command
-   below.
+Classic Manager: https://manager.linode.com/profile/api
 
-  * [Cloud Manager](https://cloud.linode.com/profile/tokens)
+First you need to login to your Linode account to get your API Key.
 
-   Click on "Add a Personal Access Token". Give the new key a "Label" (we
-   recommend *ACME*), give it Read/Write access to "Domains". "Submit", and
-   copy the new key into the `LINODE_API_KEY` command below.
+Then add an API key with label *ACME* and copy the new key into the following
+command.
 
 ```sh
 export LINODE_API_KEY="..."
 ```
 
-Due to the reload time of any changes in the DNS records, we have to use the `dnssleep` option to wait at least 15 minutes for the changes to take effect.
+Due to the reload time of any changes in the DNS records, we have to use the
+`dnssleep` option to wait at least 15 minutes for the changes to take effect.
 
 Ok, let's issue a cert now:
 
@@ -293,7 +294,35 @@ Ok, let's issue a cert now:
 acme.sh --issue --dns dns_linode --dnssleep 900 -d example.com -d www.example.com
 ```
 
-The `LINODE_API_KEY` will be saved in `~/.acme.sh/account.conf` and will be reused when needed.
+The `LINODE_API_KEY` will be saved in `~/.acme.sh/account.conf` and will be
+reused when needed.
+
+### Cloud Manager ###
+
+Cloud Manager: https://cloud.linode.com/profile/tokens
+
+First you need to login to your Linode account to get your API Key.
+
+   1. Click on "Add a Personal Access Token".
+   2. Give the new key a "Label" (we recommend *ACME*)
+   3. Give it Read/Write access to "Domains"
+   4. "Submit" and copy the new key into the `LINODE_V4_API_KEY` command below.
+
+```sh
+export LINODE_V4_API_KEY="..."
+```
+
+Due to the reload time of any changes in the DNS records, we have to use the
+`dnssleep` option to wait at least 15 minutes for the changes to take effect.
+
+Ok, let's issue a cert now:
+
+```sh
+acme.sh --issue --dns dns_linode_v4 --dnssleep 900 -d example.com -d www.example.com
+```
+
+The `LINODE_V4_API_KEY` will be saved in `~/.acme.sh/account.conf` and will be
+reused when needed.
 
 ## 15. Use FreeDNS
 
@@ -1080,6 +1109,24 @@ acme.sh --issue --dns dns_neodigit -d example.com -d www.example.com
 
 Neodigit API Token will be saved in `~/.acme.sh/account.conf` and will be used when needed.
 
+## 57. Use Exoscale API
+
+Create an API key and secret key in the Exoscale account section
+
+Set your API and secret key:
+
+```
+export EXOSCALE_API_KEY='xxx'
+export EXOSCALE_SECRET_KEY='xxx'
+```
+
+Now, let's issue a cert:
+```
+acme.sh --issue --dns dns_netcup -d example.com -d www.example.com
+```
+
+The `EXOSCALE_API_KEY` and `EXOSCALE_SECRET_KEY` will be saved in `~/.acme.sh/account.conf` and will be reused when needed.
+
 # Use custom API
 
 If your API is not supported yet, you can write your own DNS API.
diff --git a/dnsapi/dns_exoscale.sh b/dnsapi/dns_exoscale.sh
new file mode 100755
index 00000000..ccf05fc5
--- /dev/null
+++ b/dnsapi/dns_exoscale.sh
@@ -0,0 +1,168 @@
+#!/usr/bin/env sh
+
+EXOSCALE_API=https://api.exoscale.com/dns/v1
+
+########  Public functions #####################
+
+# Usage: add  _acme-challenge.www.domain.com   "XKrxpRBosdIKFzxW_CT3KLZNf6q0HG9i01zxXp5CPBs"
+# Used to add txt record
+dns_exoscale_add() {
+  fulldomain=$1
+  txtvalue=$2
+
+  if ! _checkAuth; then
+    return 1
+  fi
+
+  _debug "First detect the root zone"
+  if ! _get_root "$fulldomain"; then
+    _err "invalid domain"
+    return 1
+  fi
+
+  _debug _sub_domain "$_sub_domain"
+  _debug _domain "$_domain"
+
+  _info "Adding record"
+  if _exoscale_rest POST "domains/$_domain_id/records" "{\"record\":{\"name\":\"$_sub_domain\",\"record_type\":\"TXT\",\"content\":\"$txtvalue\",\"ttl\":120}}" "$_domain_token"; then
+    if _contains "$response" "$txtvalue"; then
+      _info "Added, OK"
+      return 0
+    fi
+  fi
+  _err "Add txt record error."
+  return 1
+
+}
+
+# Usage: fulldomain txtvalue
+# Used to remove the txt record after validation
+dns_exoscale_rm() {
+  fulldomain=$1
+  txtvalue=$2
+
+  if ! _checkAuth; then
+    return 1
+  fi
+
+  _debug "First detect the root zone"
+  if ! _get_root "$fulldomain"; then
+    _err "invalid domain"
+    return 1
+  fi
+
+  _debug _sub_domain "$_sub_domain"
+  _debug _domain "$_domain"
+
+  _debug "Getting txt records"
+  _exoscale_rest GET "domains/${_domain_id}/records?type=TXT&name=$_sub_domain" "" "$_domain_token"
+  if _contains "$response" "\"name\":\"$_sub_domain\"" >/dev/null; then
+    _record_id=$(echo "$response" | tr '{' "\n" | grep "\"content\":\"$txtvalue\"" | _egrep_o "\"id\":[^,]+" | _head_n 1 | cut -d : -f 2 | tr -d \")
+  fi
+
+  if [ -z "$_record_id" ]; then
+    _err "Can not get record id to remove."
+    return 1
+  fi
+
+  _debug "Deleting record $_record_id"
+
+  if ! _exoscale_rest DELETE "domains/$_domain_id/records/$_record_id" "" "$_domain_token"; then
+    _err "Delete record error."
+    return 1
+  fi
+
+  return 0
+}
+
+####################  Private functions below ##################################
+
+_checkAuth() {
+  EXOSCALE_API_KEY="${EXOSCALE_API_KEY:-$(_readaccountconf_mutable EXOSCALE_API_KEY)}"
+  EXOSCALE_SECRET_KEY="${EXOSCALE_SECRET_KEY:-$(_readaccountconf_mutable EXOSCALE_SECRET_KEY)}"
+
+  if [ -z "$EXOSCALE_API_KEY" ] || [ -z "$EXOSCALE_SECRET_KEY" ]; then
+    EXOSCALE_API_KEY=""
+    EXOSCALE_SECRET_KEY=""
+    _err "You don't specify Exoscale application key and application secret yet."
+    _err "Please create you key and try again."
+    return 1
+  fi
+
+  _saveaccountconf_mutable EXOSCALE_API_KEY "$EXOSCALE_API_KEY"
+  _saveaccountconf_mutable EXOSCALE_SECRET_KEY "$EXOSCALE_SECRET_KEY"
+
+  return 0
+}
+
+#_acme-challenge.www.domain.com
+#returns
+# _sub_domain=_acme-challenge.www
+# _domain=domain.com
+# _domain_id=sdjkglgdfewsdfg
+# _domain_token=sdjkglgdfewsdfg
+_get_root() {
+
+  if ! _exoscale_rest GET "domains"; then
+    return 1
+  fi
+
+  domain=$1
+  i=2
+  p=1
+  while true; do
+    h=$(printf "%s" "$domain" | cut -d . -f $i-100)
+    _debug h "$h"
+    if [ -z "$h" ]; then
+      #not valid
+      return 1
+    fi
+
+    if _contains "$response" "\"name\":\"$h\"" >/dev/null; then
+      _domain_id=$(echo "$response" | tr '{' "\n" | grep "\"name\":\"$h\"" | _egrep_o "\"id\":[^,]+" | _head_n 1 | cut -d : -f 2 | tr -d \")
+      _domain_token=$(echo "$response" | tr '{' "\n" | grep "\"name\":\"$h\"" | _egrep_o "\"token\":\"[^\"]*\"" | _head_n 1 | cut -d : -f 2 | tr -d \")
+      if [ "$_domain_token" ] && [ "$_domain_id" ]; then
+        _sub_domain=$(printf "%s" "$domain" | cut -d . -f 1-$p)
+        _domain=$h
+        return 0
+      fi
+      return 1
+    fi
+    p=$i
+    i=$(_math "$i" + 1)
+  done
+  return 1
+}
+
+# returns response
+_exoscale_rest() {
+  method=$1
+  path="$2"
+  data="$3"
+  token="$4"
+  request_url="$EXOSCALE_API/$path"
+  _debug "$path"
+
+  export _H1="Accept: application/json"
+
+  if [ "$token" ]; then
+    export _H2="X-DNS-Domain-Token: $token"
+  else
+    export _H2="X-DNS-Token: $EXOSCALE_API_KEY:$EXOSCALE_SECRET_KEY"
+  fi
+
+  if [ "$data" ] || [ "$method" = "DELETE" ]; then
+    export _H3="Content-Type: application/json"
+    _debug data "$data"
+    response="$(_post "$data" "$request_url" "" "$method")"
+  else
+    response="$(_get "$request_url" "" "" "$method")"
+  fi
+
+  if [ "$?" != "0" ]; then
+    _err "error $request_url"
+    return 1
+  fi
+  _debug2 response "$response"
+  return 0
+}
diff --git a/dnsapi/dns_linode.sh b/dnsapi/dns_linode.sh
index d03e6c47..ead5b164 100755
--- a/dnsapi/dns_linode.sh
+++ b/dnsapi/dns_linode.sh
@@ -2,7 +2,7 @@
 
 #Author: Philipp Grosswiler <philipp.grosswiler@swiss-design.net>
 
-LINODE_API_URL="https://api.linode.com/v4/domains"
+LINODE_API_URL="https://api.linode.com/?api_key=$LINODE_API_KEY&api_action="
 
 ########  Public functions #####################
 
@@ -27,14 +27,10 @@ dns_linode_add() {
   _debug _sub_domain "$_sub_domain"
   _debug _domain "$_domain"
 
-  _payload="{
-              \"type\": \"TXT\",
-              \"name\": \"$_sub_domain\",
-              \"target\": \"$txtvalue\"
-            }"
+  _parameters="&DomainID=$_domain_id&Type=TXT&Name=$_sub_domain&Target=$txtvalue"
 
-  if _rest POST "/$_domain_id/records" "$_payload" && [ -n "$response" ]; then
-    _resource_id=$(printf "%s\n" "$response" | _egrep_o "\"id\":\s*[0-9]+" | cut -d : -f 2 | tr -d " " | _head_n 1)
+  if _rest GET "domain.resource.create" "$_parameters" && [ -n "$response" ]; then
+    _resource_id=$(printf "%s\n" "$response" | _egrep_o "\"ResourceID\":\s*[0-9]+" | cut -d : -f 2 | tr -d " " | _head_n 1)
     _debug _resource_id "$_resource_id"
 
     if [ -z "$_resource_id" ]; then
@@ -69,21 +65,25 @@ dns_linode_rm() {
   _debug _sub_domain "$_sub_domain"
   _debug _domain "$_domain"
 
-  if _rest GET "/$_domain_id/records" && [ -n "$response" ]; then
+  _parameters="&DomainID=$_domain_id"
+
+  if _rest GET "domain.resource.list" "$_parameters" && [ -n "$response" ]; then
     response="$(echo "$response" | tr -d "\n" | tr '{' "|" | sed 's/|/&{/g' | tr "|" "\n")"
 
-    resource="$(echo "$response" | _egrep_o "{.*\"name\":\s*\"$_sub_domain\".*}")"
+    resource="$(echo "$response" | _egrep_o "{.*\"NAME\":\s*\"$_sub_domain\".*}")"
     if [ "$resource" ]; then
-      _resource_id=$(printf "%s\n" "$resource" | _egrep_o "\"id\":\s*[0-9]+" | _head_n 1 | cut -d : -f 2 | tr -d \ )
+      _resource_id=$(printf "%s\n" "$resource" | _egrep_o "\"RESOURCEID\":\s*[0-9]+" | _head_n 1 | cut -d : -f 2 | tr -d \ )
       if [ "$_resource_id" ]; then
         _debug _resource_id "$_resource_id"
 
-        if _rest DELETE "/$_domain_id/records/$_resource_id" && [ -n "$response" ]; then
-          # On 200/OK, empty set is returned. Check for error, if any.
-          _error_response=$(printf "%s\n" "$response" | _egrep_o "\"errors\"" | cut -d : -f 2 | tr -d " " | _head_n 1)
+        _parameters="&DomainID=$_domain_id&ResourceID=$_resource_id"
+
+        if _rest GET "domain.resource.delete" "$_parameters" && [ -n "$response" ]; then
+          _resource_id=$(printf "%s\n" "$response" | _egrep_o "\"ResourceID\":\s*[0-9]+" | cut -d : -f 2 | tr -d " " | _head_n 1)
+          _debug _resource_id "$_resource_id"
 
-          if [ -n "$_error_response" ]; then
-            _err "Error deleting the domain resource: $_error_response"
+          if [ -z "$_resource_id" ]; then
+            _err "Error deleting the domain resource."
             return 1
           fi
 
@@ -127,7 +127,7 @@ _get_root() {
   i=2
   p=1
 
-  if _rest GET; then
+  if _rest GET "domain.list"; then
     response="$(echo "$response" | tr -d "\n" | tr '{' "|" | sed 's/|/&{/g' | tr "|" "\n")"
     while true; do
       h=$(printf "%s" "$domain" | cut -d . -f $i-100)
@@ -137,9 +137,9 @@ _get_root() {
         return 1
       fi
 
-      hostedzone="$(echo "$response" | _egrep_o "{.*\"domain\":\s*\"$h\".*}")"
+      hostedzone="$(echo "$response" | _egrep_o "{.*\"DOMAIN\":\s*\"$h\".*}")"
       if [ "$hostedzone" ]; then
-        _domain_id=$(printf "%s\n" "$hostedzone" | _egrep_o "\"id\":\s*[0-9]+" | _head_n 1 | cut -d : -f 2 | tr -d \ )
+        _domain_id=$(printf "%s\n" "$hostedzone" | _egrep_o "\"DOMAINID\":\s*[0-9]+" | _head_n 1 | cut -d : -f 2 | tr -d \ )
         if [ "$_domain_id" ]; then
           _sub_domain=$(printf "%s" "$domain" | cut -d . -f 1-$p)
           _domain=$h
@@ -165,7 +165,6 @@ _rest() {
 
   export _H1="Accept: application/json"
   export _H2="Content-Type: application/json"
-  export _H3="Authorization: Bearer $LINODE_API_KEY"
 
   if [ "$mtd" != "GET" ]; then
     # both POST and DELETE.
diff --git a/dnsapi/dns_linode_v4.sh b/dnsapi/dns_linode_v4.sh
new file mode 100755
index 00000000..dfa1a651
--- /dev/null
+++ b/dnsapi/dns_linode_v4.sh
@@ -0,0 +1,185 @@
+#!/usr/bin/env sh
+
+#Original Author: Philipp Grosswiler <philipp.grosswiler@swiss-design.net>
+#v4 Update Author: Aaron W. Swenson <aaron@grandmasfridge.org>
+
+LINODE_V4_API_URL="https://api.linode.com/v4/domains"
+
+########  Public functions #####################
+
+#Usage: dns_linode_add   _acme-challenge.www.domain.com   "XKrxpRBosdIKFzxW_CT3KLZNf6q0HG9i01zxXp5CPBs"
+dns_linode_add() {
+  fulldomain="${1}"
+  txtvalue="${2}"
+
+  if ! _Linode_API; then
+    return 1
+  fi
+
+  _info "Using Linode"
+  _debug "Calling: dns_linode_add() '${fulldomain}' '${txtvalue}'"
+
+  _debug "First detect the root zone"
+  if ! _get_root "$fulldomain"; then
+    _err "Domain does not exist."
+    return 1
+  fi
+  _debug _domain_id "$_domain_id"
+  _debug _sub_domain "$_sub_domain"
+  _debug _domain "$_domain"
+
+  _payload="{
+              \"type\": \"TXT\",
+              \"name\": \"$_sub_domain\",
+              \"target\": \"$txtvalue\"
+            }"
+
+  if _rest POST "/$_domain_id/records" "$_payload" && [ -n "$response" ]; then
+    _resource_id=$(printf "%s\n" "$response" | _egrep_o "\"id\":\s*[0-9]+" | cut -d : -f 2 | tr -d " " | _head_n 1)
+    _debug _resource_id "$_resource_id"
+
+    if [ -z "$_resource_id" ]; then
+      _err "Error adding the domain resource."
+      return 1
+    fi
+
+    _info "Domain resource successfully added."
+    return 0
+  fi
+
+  return 1
+}
+
+#Usage: dns_linode_rm   _acme-challenge.www.domain.com
+dns_linode_rm() {
+  fulldomain="${1}"
+
+  if ! _Linode_API; then
+    return 1
+  fi
+
+  _info "Using Linode"
+  _debug "Calling: dns_linode_rm() '${fulldomain}'"
+
+  _debug "First detect the root zone"
+  if ! _get_root "$fulldomain"; then
+    _err "Domain does not exist."
+    return 1
+  fi
+  _debug _domain_id "$_domain_id"
+  _debug _sub_domain "$_sub_domain"
+  _debug _domain "$_domain"
+
+  if _rest GET "/$_domain_id/records" && [ -n "$response" ]; then
+    response="$(echo "$response" | tr -d "\n" | tr '{' "|" | sed 's/|/&{/g' | tr "|" "\n")"
+
+    resource="$(echo "$response" | _egrep_o "{.*\"name\":\s*\"$_sub_domain\".*}")"
+    if [ "$resource" ]; then
+      _resource_id=$(printf "%s\n" "$resource" | _egrep_o "\"id\":\s*[0-9]+" | _head_n 1 | cut -d : -f 2 | tr -d \ )
+      if [ "$_resource_id" ]; then
+        _debug _resource_id "$_resource_id"
+
+        if _rest DELETE "/$_domain_id/records/$_resource_id" && [ -n "$response" ]; then
+          # On 200/OK, empty set is returned. Check for error, if any.
+          _error_response=$(printf "%s\n" "$response" | _egrep_o "\"errors\"" | cut -d : -f 2 | tr -d " " | _head_n 1)
+
+          if [ -n "$_error_response" ]; then
+            _err "Error deleting the domain resource: $_error_response"
+            return 1
+          fi
+
+          _info "Domain resource successfully deleted."
+          return 0
+        fi
+      fi
+
+      return 1
+    fi
+
+    return 0
+  fi
+
+  return 1
+}
+
+####################  Private functions below ##################################
+
+_Linode_API() {
+  if [ -z "$LINODE_V4_API_KEY" ]; then
+    LINODE_V4_API_KEY=""
+
+    _err "You didn't specify the Linode v4 API key yet."
+    _err "Please create your key and try again."
+
+    return 1
+  fi
+
+  _saveaccountconf LINODE_V4_API_KEY "$LINODE_V4_API_KEY"
+}
+
+####################  Private functions below ##################################
+#_acme-challenge.www.domain.com
+#returns
+# _sub_domain=_acme-challenge.www
+# _domain=domain.com
+# _domain_id=12345
+_get_root() {
+  domain=$1
+  i=2
+  p=1
+
+  if _rest GET; then
+    response="$(echo "$response" | tr -d "\n" | tr '{' "|" | sed 's/|/&{/g' | tr "|" "\n")"
+    while true; do
+      h=$(printf "%s" "$domain" | cut -d . -f $i-100)
+      _debug h "$h"
+      if [ -z "$h" ]; then
+        #not valid
+        return 1
+      fi
+
+      hostedzone="$(echo "$response" | _egrep_o "{.*\"domain\":\s*\"$h\".*}")"
+      if [ "$hostedzone" ]; then
+        _domain_id=$(printf "%s\n" "$hostedzone" | _egrep_o "\"id\":\s*[0-9]+" | _head_n 1 | cut -d : -f 2 | tr -d \ )
+        if [ "$_domain_id" ]; then
+          _sub_domain=$(printf "%s" "$domain" | cut -d . -f 1-$p)
+          _domain=$h
+          return 0
+        fi
+        return 1
+      fi
+      p=$i
+      i=$(_math "$i" + 1)
+    done
+  fi
+  return 1
+}
+
+#method method action data
+_rest() {
+  mtd="$1"
+  ep="$2"
+  data="$3"
+
+  _debug mtd "$mtd"
+  _debug ep "$ep"
+
+  export _H1="Accept: application/json"
+  export _H2="Content-Type: application/json"
+  export _H3="Authorization: Bearer $LINODE_V4_API_KEY"
+
+  if [ "$mtd" != "GET" ]; then
+    # both POST and DELETE.
+    _debug data "$data"
+    response="$(_post "$data" "$LINODE_V4_API_URL$ep" "" "$mtd")"
+  else
+    response="$(_get "$LINODE_V4_API_URL$ep$data")"
+  fi
+
+  if [ "$?" != "0" ]; then
+    _err "error $ep"
+    return 1
+  fi
+  _debug2 response "$response"
+  return 0
+}