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Full Discussion: Ssh to validate multiple remote hosts connection validation.
Top Forums Shell Programming and Scripting Ssh to validate multiple remote hosts connection validation. Post 303013278 by sadique.manzar on Monday 19th of February 2018 06:06:37 AM
Old 02-19-2018
Here is the output.

Code:
while read -r hosts port
do
        ssh -q -o "BatchMode=yes" -p "$port" "$hosts" "echo 2>&1"
        [ $? -eq 0 ] && echo "Connected to ${hosts} for port ${port}" || echo "Connection refused to ${hosts} for port ${port}, Please check"
done < /home/ssh_configfile
+ read -r hosts port
+ ssh -q -o BatchMode=yes -p 22 abc@1.2.3.42 'echo 2>&1'

+ '[' 0 -eq 0 ']'
+ echo 'Connected to abc@1.2.3.42 for port 22'
Connected to abc@1.2.3.42 for port 22
+ read -r hosts port


i have multiple server and its reading only 1st ip for rest it is not reading and checking the connection.

If anyone who can be humble and kind enough to guide me on the right direction.


Regards,
Sadique

---------- Post updated at 06:06 AM ---------- Previous update was at 06:01 AM ----------

Thanks Rudic your observation worked for me now with my original code i am able to connect to all the ip with their host and validate the connection.
Also as u suggested i have removed the
Code:
|| [[ -n $lines ]] ;

Thank you for the help everyone.
 

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LEARN ABOUT CENTOS

libssh2_knownhost_checkp

libssh2_knownhost_check(3)					  libssh2 manual					libssh2_knownhost_check(3)

NAME

       libssh2_knownhost_checkp - check a host+key against the list of known hosts

SYNOPSIS

       #include <libssh2.h>

       int libssh2_knownhost_checkp(LIBSSH2_KNOWNHOSTS *hosts,
				    const char *host, int port,
				    const char *key, size_t keylen,
				    int typemask,
				    struct libssh2_knownhost **knownhost);

DESCRIPTION

       Checks a host and its associated key against the collection of known hosts, and returns info back about the (partially) matched entry.

       host is a pointer the host name in plain text. The host name can be the IP numerical address of the host or the full name.

       port  is the port number used by the host (or a negative number to check the generic host). If the port number is given, libssh2 will check
       the key for the specific host + port number combination in addition to the plain host name only check.

       key is a pointer to the key for the given host.

       keylen is the total size in bytes of the key pointed to by the key argument

       typemask is a bitmask that specifies format and info about the data passed to this function. Specificly, it details what  format  the  host
       name is, what format the key is and what key type it is.

       The host name is given as one of the following types: LIBSSH2_KNOWNHOST_TYPE_PLAIN or LIBSSH2_KNOWNHOST_TYPE_CUSTOM.

       The key is encoded using one of the following encodings: LIBSSH2_KNOWNHOST_KEYENC_RAW or LIBSSH2_KNOWNHOST_KEYENC_BASE64.

       knownhost  if  set  to  non-NULL, it must be a pointer to a 'struct libssh2_knownhost' pointer that gets filled in to point to info about a
       known host that matches or partially matches.

RETURN VALUE

       libssh2_knownhost_check(3) returns info about how well the provided host + key pair matched one of the entries in the list of known hosts.

       LIBSSH2_KNOWNHOST_CHECK_FAILURE - something prevented the check to be made

       LIBSSH2_KNOWNHOST_CHECK_NOTFOUND - no host match was found

       LIBSSH2_KNOWNHOST_CHECK_MATCH - hosts and keys match.

       LIBSSH2_KNOWNHOST_CHECK_MISMATCH - host was found, but the keys didn't match!

AVAILABILITY

       Added in libssh2 1.2.6

EXAMPLE

       See the ssh2_exec.c example as provided in the tarball.

SEE ALSO

       libssh2_knownhost_init(3) libssh2_knownhost_free(3) libssh2_knownhost_add(3)

libssh2 1.2.6							    1 May 2010						libssh2_knownhost_check(3)
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