I just want to ask regarding the meaning of the error that we got using sftp:
Is that saying it has an error in line 10 of the known_hosts file?
We are suspecting that it has been corrupted. What we will do is to remove that line (#10) and manually sftp to that target server to set the known_hosts file, then we run the script afterwards. Please advice. Thanks.
Hi There
What causes the remote printers on unix to loose its connections to the Unix server Sco 6 Version 7
When pinging the print server from unix is comes up with host not connected, but after a few moments the ping reply is positive
Then we do a disable and enable of the said printer... (0 Replies)
Dear All,
I'm trying to configure a passwordless connection between two servers of HP-UX. i have srearched the configuration in google so many times and as per the guidence i have done all the steps, but still its not working and every time it is asking for password while trying to scp some file... (2 Replies)
Hi all,
I am new to this forum and want an urgent help from you experts. I am currently using SunOs 5.10.
I have a .cfi file which contains some commands to be executed in a node(MSC node in telecom) To connect to a node (for eg node name is MSC1) we have a shell script that has the... (5 Replies)
Hi,
I am running a shell script which will spawn the telnet and login.
But sometimes, the telnet session itself is not getting spawned.
My requirement is, if the telnet session is not spawned, the user must be notified that it failed.
Is there any command to capture the status of telnet... (2 Replies)
Hello,
Sometimes when i execute my shell that makes sftp it gives me this error:
Couldn't close file: Failure.
What does it mean?, how can i make sure it will do ok?.
Bye (2 Replies)
Hi all,
I logged on to a Unix server and am trying to connect a remote Windows server (Windows NT) via SSH/SFTP. However I always got the following error,
sftp username@host_server (or ssh username@host_server)
ssh: connect to host host_server port 22: Connection refused
Any advise... (1 Reply)
Hi ,
I need to write a IF condition to know if a SFTP file transfer is successful or not and send email if its failed.
`sftp username@servername <<comm1
cd /directory
put filename
comm1
bye`
I use above commands for my connections. So please help me to write a IF statement.
... (0 Replies)
Hi everybody,
I am running a program on a supercomputer via my personal computer through a ssh connection. My program take more than a day to run, so when I left work with my PC I stop the connection with the supercomputer and the program stop.
I am wondering if someone know how I can manage... (2 Replies)
Hi,
I want to validate ssh connection one after one for multiple servers..... password less keys already setup but now i want to validate if ssh is working fine or not...
I have .sh script like below and i have servers.txt contains all the list of servers
#/bin/bash
for host in $(cat... (3 Replies)
Discussion started by: sreeram4
3 Replies
LEARN ABOUT PHP
ssh-keyscan
SSH-KEYSCAN(1) BSD General Commands Manual SSH-KEYSCAN(1)NAME
ssh-keyscan -- gather ssh public keys
SYNOPSIS
ssh-keyscan [-46cHv] [-f file] [-p port] [-T timeout] [-t type] [host | addrlist namelist] ...
DESCRIPTION
ssh-keyscan is a utility for gathering the public ssh host keys of a number of hosts. It was designed to aid in building and verifying
ssh_known_hosts files. ssh-keyscan provides a minimal interface suitable for use by shell and perl scripts.
ssh-keyscan uses non-blocking socket I/O to contact as many hosts as possible in parallel, so it is very efficient. The keys from a domain
of 1,000 hosts can be collected in tens of seconds, even when some of those hosts are down or do not run ssh. For scanning, one does not
need login access to the machines that are being scanned, nor does the scanning process involve any encryption.
The options are as follows:
-4 Forces ssh-keyscan to use IPv4 addresses only.
-6 Forces ssh-keyscan to use IPv6 addresses only.
-c Request certificates from target hosts instead of plain keys.
-f file
Read hosts or ``addrlist namelist'' pairs from file, one per line. If - is supplied instead of a filename, ssh-keyscan will read
hosts or ``addrlist namelist'' pairs from the standard input.
-H Hash all hostnames and addresses in the output. Hashed names may be used normally by ssh and sshd, but they do not reveal identify-
ing information should the file's contents be disclosed.
-p port
Port to connect to on the remote host.
-T timeout
Set the timeout for connection attempts. If timeout seconds have elapsed since a connection was initiated to a host or since the
last time anything was read from that host, then the connection is closed and the host in question considered unavailable. Default
is 5 seconds.
-t type
Specifies the type of the key to fetch from the scanned hosts. The possible values are ``dsa'', ``ecdsa'', ``ed25519'', or ``rsa''.
Multiple values may be specified by separating them with commas. The default is to fetch ``rsa'', ``ecdsa'', and ``ed25519'' keys.
-v Verbose mode. Causes ssh-keyscan to print debugging messages about its progress.
SECURITY
If an ssh_known_hosts file is constructed using ssh-keyscan without verifying the keys, users will be vulnerable to man in the middle
attacks. On the other hand, if the security model allows such a risk, ssh-keyscan can help in the detection of tampered keyfiles or man in
the middle attacks which have begun after the ssh_known_hosts file was created.
FILES
Input format:
1.2.3.4,1.2.4.4 name.my.domain,name,n.my.domain,n,1.2.3.4,1.2.4.4
Output format for RSA, DSA, ECDSA, and Ed25519 keys:
host-or-namelist keytype base64-encoded-key
Where keytype is either ``ecdsa-sha2-nistp256'', ``ecdsa-sha2-nistp384'', ``ecdsa-sha2-nistp521'', ``ssh-ed25519'', ``ssh-dss'' or
``ssh-rsa''.
/etc/ssh/ssh_known_hosts
EXAMPLES
Print the rsa host key for machine hostname:
$ ssh-keyscan hostname
Find all hosts from the file ssh_hosts which have new or different keys from those in the sorted file ssh_known_hosts:
$ ssh-keyscan -t rsa,dsa,ecdsa,ed25519 -f ssh_hosts |
sort -u - ssh_known_hosts | diff ssh_known_hosts -
SEE ALSO ssh(1), sshd(8)AUTHORS
David Mazieres <dm@lcs.mit.edu> wrote the initial version, and Wayne Davison <wayned@users.sourceforge.net> added support for protocol ver-
sion 2.
BUGS
It generates "Connection closed by remote host" messages on the consoles of all the machines it scans if the server is older than version
2.9. This is because it opens a connection to the ssh port, reads the public key, and drops the connection as soon as it gets the key.
BSD May 2, 2017 BSD