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+---
+c: Copyright (C) Daniel Stenberg, <daniel.se>, et al.
+SPDX-License-Identifier: curl
+Title: CURLOPT_SSH_KNOWNHOSTS
+Section: 3
+Source: libcurl
+See-also:
+  - CURLOPT_SSH_AUTH_TYPES (3)
+  - CURLOPT_SSH_HOST_PUBLIC_KEY_MD5 (3)
+---
+
+# NAME
+
+CURLOPT_SSH_KNOWNHOSTS - filename holding the SSH known hosts
+
+# SYNOPSIS
+
+~~~c
+#include <curl/curl.h>
+
+CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SSH_KNOWNHOSTS, char *fname);
+~~~
+
+# DESCRIPTION
+
+Pass a pointer to a null-terminated string holding the filename of the
+known_host file to use. The known_hosts file should use the OpenSSH file
+format as supported by libssh2. If this file is specified, libcurl only
+accepts connections with hosts that are known and present in that file, with a
+matching public key. Use CURLOPT_SSH_KEYFUNCTION(3) to alter the default
+behavior on host and key matches and mismatches.
+
+The application does not have to keep the string around after setting this
+option.
+
+# DEFAULT
+
+NULL
+
+# PROTOCOLS
+
+SFTP and SCP
+
+# EXAMPLE
+
+~~~c
+int main(void)
+{
+  CURL *curl = curl_easy_init();
+  if(curl) {
+    CURLcode res;
+    curl_easy_setopt(curl, CURLOPT_URL, "sftp://example.com/file");
+    curl_easy_setopt(curl, CURLOPT_SSH_KNOWNHOSTS,
+                     "/home/clarkkent/.ssh/known_hosts");
+    res = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
+  }
+}
+~~~
+
+# AVAILABILITY
+
+Added in 7.19.6
+
+# RETURN VALUE
+
+Returns CURLE_OK if the option is supported, CURLE_UNKNOWN_OPTION if not, or
+CURLE_OUT_OF_MEMORY if there was insufficient heap space.