Packages and Binaries:

openssh-client

This is the portable version of OpenSSH, a free implementation of the Secure Shell protocol as specified by the IETF secsh working group.

Ssh (Secure Shell) is a program for logging into a remote machine and for executing commands on a remote machine. It provides secure encrypted communications between two untrusted hosts over an insecure network. X11 connections and arbitrary TCP/IP ports can also be forwarded over the secure channel. It can be used to provide applications with a secure communication channel.

This package provides the ssh, scp and sftp clients, the ssh-agent and ssh-add programs to make public key authentication more convenient, and the ssh-keygen, ssh-keyscan, ssh-copy-id and ssh-argv0 utilities.

In some countries it may be illegal to use any encryption at all without a special permit.

ssh replaces the insecure rsh, rcp and rlogin programs, which are obsolete for most purposes.

Installed size: 4.19 MB
How to install: sudo apt install openssh-client

  • adduser
  • dpkg
  • libc6
  • libedit2
  • libfido2-1
  • libgssapi-krb5-2
  • libselinux1
  • libssl1.1
  • passwd
  • zlib1g
scp

OpenSSH secure file copy

root@kali:~# scp -h
unknown option -- h
usage: scp [-346ABCpqrTv] [-c cipher] [-F ssh_config] [-i identity_file]
            [-J destination] [-l limit] [-o ssh_option] [-P port]
            [-S program] source ... target

sftp

OpenSSH secure file transfer

root@kali:~# sftp --help
unknown option -- -
usage: sftp [-46AaCfNpqrv] [-B buffer_size] [-b batchfile] [-c cipher]
          [-D sftp_server_path] [-F ssh_config] [-i identity_file]
          [-J destination] [-l limit] [-o ssh_option] [-P port]
          [-R num_requests] [-S program] [-s subsystem | sftp_server]
          destination

slogin

OpenSSH remote login client

root@kali:~# slogin -h
unknown option -- h
usage: ssh [-46AaCfGgKkMNnqsTtVvXxYy] [-B bind_interface]
           [-b bind_address] [-c cipher_spec] [-D [bind_address:]port]
           [-E log_file] [-e escape_char] [-F configfile] [-I pkcs11]
           [-i identity_file] [-J [user@]host[:port]] [-L address]
           [-l login_name] [-m mac_spec] [-O ctl_cmd] [-o option] [-p port]
           [-Q query_option] [-R address] [-S ctl_path] [-W host:port]
           [-w local_tun[:remote_tun]] destination [command]

ssh

OpenSSH remote login client

root@kali:~# ssh -h
unknown option -- h
usage: ssh [-46AaCfGgKkMNnqsTtVvXxYy] [-B bind_interface]
           [-b bind_address] [-c cipher_spec] [-D [bind_address:]port]
           [-E log_file] [-e escape_char] [-F configfile] [-I pkcs11]
           [-i identity_file] [-J [user@]host[:port]] [-L address]
           [-l login_name] [-m mac_spec] [-O ctl_cmd] [-o option] [-p port]
           [-Q query_option] [-R address] [-S ctl_path] [-W host:port]
           [-w local_tun[:remote_tun]] destination [command]

ssh-add

Adds private key identities to the OpenSSH authentication agent

root@kali:~# man ssh-add
SSH-ADD(1)                BSD General Commands Manual               SSH-ADD(1)

NAME
     ssh-add -- adds private key identities to the OpenSSH authentication
     agent

SYNOPSIS
     ssh-add [-cDdKkLlqvXx] [-E fingerprint_hash] [-S provider] [-t life]
             [file ...]
     ssh-add -s pkcs11
     ssh-add -e pkcs11
     ssh-add -T pubkey ...

DESCRIPTION
     ssh-add adds private key identities to the authentication agent,
     ssh-agent(1).  When run without arguments, it adds the files
     ~/.ssh/id_rsa, ~/.ssh/id_dsa, ~/.ssh/id_ecdsa, ~/.ssh/id_ecdsa_sk,
     ~/.ssh/id_ed25519, and ~/.ssh/id_ed25519_sk.  After loading a private
     key, ssh-add will try to load corresponding certificate information from
     the filename obtained by appending -cert.pub to the name of the private
     key file.  Alternative file names can be given on the command line.

     If any file requires a passphrase, ssh-add asks for the passphrase from
     the user.  The passphrase is read from the user's tty.  ssh-add retries
     the last passphrase if multiple identity files are given.

     The authentication agent must be running and the SSH_AUTH_SOCK environ-
     ment variable must contain the name of its socket for ssh-add to work.

     The options are as follows:

     -c      Indicates that added identities should be subject to confirmation
             before being used for authentication.  Confirmation is performed
             by ssh-askpass(1).  Successful confirmation is signaled by a zero
             exit status from ssh-askpass(1), rather than text entered into
             the requester.

     -D      Deletes all identities from the agent.

     -d      Instead of adding identities, removes identities from the agent.
             If ssh-add has been run without arguments, the keys for the de-
             fault identities and their corresponding certificates will be re-
             moved.  Otherwise, the argument list will be interpreted as a
             list of paths to public key files to specify keys and certifi-
             cates to be removed from the agent.  If no public key is found at
             a given path, ssh-add will append .pub and retry.  If the argu-
             ment list consists of "-" then ssh-add will read public keys to
             be removed from standard input.

     -E fingerprint_hash
             Specifies the hash algorithm used when displaying key finger-
             prints.  Valid options are: "md5" and "sha256".  The default is
             "sha256".

     -e pkcs11
             Remove keys provided by the PKCS#11 shared library pkcs11.

     -K      Load resident keys from a FIDO authenticator.

     -k      When loading keys into or deleting keys from the agent, process
             plain private keys only and skip certificates.

     -L      Lists public key parameters of all identities currently repre-
             sented by the agent.

     -l      Lists fingerprints of all identities currently represented by the
             agent.

     -q      Be quiet after a successful operation.

     -S provider
             Specifies a path to a library that will be used when adding FIDO
             authenticator-hosted keys, overriding the default of using the
             internal USB HID support.

     -s pkcs11
             Add keys provided by the PKCS#11 shared library pkcs11.

     -T pubkey ...
             Tests whether the private keys that correspond to the specified
             pubkey files are usable by performing sign and verify operations
             on each.

     -t life
             Set a maximum lifetime when adding identities to an agent.  The
             lifetime may be specified in seconds or in a time format speci-
             fied in sshd_config(5).

     -v      Verbose mode.  Causes ssh-add to print debugging messages about
             its progress.  This is helpful in debugging problems.  Multiple
             -v options increase the verbosity.  The maximum is 3.

     -X      Unlock the agent.

     -x      Lock the agent with a password.

ENVIRONMENT
     DISPLAY, SSH_ASKPASS and SSH_ASKPASS_REQUIRE
             If ssh-add needs a passphrase, it will read the passphrase from
             the current terminal if it was run from a terminal.  If ssh-add
             does not have a terminal associated with it but DISPLAY and
             SSH_ASKPASS are set, it will execute the program specified by
             SSH_ASKPASS (by default "ssh-askpass") and open an X11 window to
             read the passphrase.  This is particularly useful when calling
             ssh-add from a .xsession or related script.

             SSH_ASKPASS_REQUIRE allows further control over the use of an
             askpass program.  If this variable is set to "never" then ssh-add
             will never attempt to use one.  If it is set to "prefer", then
             ssh-add will prefer to use the askpass program instead of the TTY
             when requesting passwords.  Finally, if the variable is set to
             "force", then the askpass program will be used for all passphrase
             input regardless of whether DISPLAY is set.

     SSH_AUTH_SOCK
             Identifies the path of a UNIX-domain socket used to communicate
             with the agent.

     SSH_SK_PROVIDER
             Specifies a path to a library that will be used when loading any
             FIDO authenticator-hosted keys, overriding the default of using
             the built-in USB HID support.

FILES
     ~/.ssh/id_dsa
     ~/.ssh/id_ecdsa
     ~/.ssh/id_ecdsa_sk
     ~/.ssh/id_ed25519
     ~/.ssh/id_ed25519_sk
     ~/.ssh/id_rsa
             Contains the DSA, ECDSA, authenticator-hosted ECDSA, Ed25519, au-
             thenticator-hosted Ed25519 or RSA authentication identity of the
             user.

     Identity files should not be readable by anyone but the user.  Note that
     ssh-add ignores identity files if they are accessible by others.

EXIT STATUS
     Exit status is 0 on success, 1 if the specified command fails, and 2 if
     ssh-add is unable to contact the authentication agent.

SEE ALSO
     ssh(1), ssh-agent(1), ssh-askpass(1), ssh-keygen(1), sshd(8)

AUTHORS
     OpenSSH is a derivative of the original and free ssh 1.2.12 release by
     Tatu Ylonen.  Aaron Campbell, Bob Beck, Markus Friedl, Niels Provos, Theo
     de Raadt and Dug Song removed many bugs, re-added newer features and cre-
     ated OpenSSH.  Markus Friedl contributed the support for SSH protocol
     versions 1.5 and 2.0.

BSD                              July 14, 2020                             BSD

ssh-agent

OpenSSH authentication agent

root@kali:~# ssh-agent -h
unknown option -- h
usage: ssh-agent [-c | -s] [-Dd] [-a bind_address] [-E fingerprint_hash]
                 [-P allowed_providers] [-t life]
       ssh-agent [-a bind_address] [-E fingerprint_hash] [-P allowed_providers]
                 [-t life] command [arg ...]
       ssh-agent [-c | -s] -k

ssh-argv0

Replaces the old ssh command-name as hostname handling

root@kali:~# man ssh-argv0
SSH-ARGV0(1)              BSD General Commands Manual             SSH-ARGV0(1)

NAME
     ssh-argv0 -- replaces the old ssh command-name as hostname handling

SYNOPSIS
     hostname | user@hostname [-l login_name] [command]

     hostname | user@hostname [-afgknqstvxACNTX1246] [-b bind_address]
     [-c cipher_spec] [-e escape_char] [-i identity_file] [-l login_name]
     [-m mac_spec] [-o option] [-p port] [-F configfile] [-L
     port:host:hostport] [-R port:host:hostport] [-D port] [command]

DESCRIPTION
     ssh-argv0 replaces the old ssh command-name as hostname handling.  If you
     link to this script with a hostname then executing the link is equivalent
     to having executed ssh with that hostname as an argument.  All other ar-
     guments are passed to ssh and will be processed normally.

OPTIONS
     See ssh(1).

FILES
     See ssh(1).

AUTHORS
     OpenSSH is a derivative of the original and free ssh 1.2.12 release by
     Tatu Ylonen.  Aaron Campbell, Bob Beck, Markus Friedl, Niels Provos, Theo
     de Raadt and Dug Song removed many bugs, re-added newer features and cre-
     ated OpenSSH.  Markus Friedl contributed the support for SSH protocol
     versions 1.5 and 2.0.  Natalie Amery wrote this ssh-argv0 script and the
     associated documentation.

SEE ALSO
     ssh(1)

Debian Project                 September 7, 2001                Debian Project

ssh-copy-id

Use locally available keys to authorise logins on a remote machine

root@kali:~# ssh-copy-id --help
Illegal option --
Usage: /usr/bin/ssh-copy-id [-h|-?|-f|-n] [-i [identity_file]] [-p port] [-F alternative ssh_config file] [[-o <ssh -o options>] ...] [user@]hostname
	-f: force mode -- copy keys without trying to check if they are already installed
	-n: dry run    -- no keys are actually copied
	-h|-?: print this help

ssh-keygen

OpenSSH authentication key utility

root@kali:~# ssh-keygen --help
unknown option -- -
usage: ssh-keygen [-q] [-a rounds] [-b bits] [-C comment] [-f output_keyfile]
                  [-m format] [-N new_passphrase] [-O option]
                  [-t dsa | ecdsa | ecdsa-sk | ed25519 | ed25519-sk | rsa]
                  [-w provider]
       ssh-keygen -p [-a rounds] [-f keyfile] [-m format] [-N new_passphrase]
                   [-P old_passphrase]
       ssh-keygen -i [-f input_keyfile] [-m key_format]
       ssh-keygen -e [-f input_keyfile] [-m key_format]
       ssh-keygen -y [-f input_keyfile]
       ssh-keygen -c [-a rounds] [-C comment] [-f keyfile] [-P passphrase]
       ssh-keygen -l [-v] [-E fingerprint_hash] [-f input_keyfile]
       ssh-keygen -B [-f input_keyfile]
       ssh-keygen -D pkcs11
       ssh-keygen -F hostname [-lv] [-f known_hosts_file]
       ssh-keygen -H [-f known_hosts_file]
       ssh-keygen -K [-a rounds] [-w provider]
       ssh-keygen -R hostname [-f known_hosts_file]
       ssh-keygen -r hostname [-g] [-f input_keyfile]
       ssh-keygen -M generate [-O option] output_file
       ssh-keygen -M screen [-f input_file] [-O option] output_file
       ssh-keygen -I certificate_identity -s ca_key [-hU] [-D pkcs11_provider]
                  [-n principals] [-O option] [-V validity_interval]
                  [-z serial_number] file ...
       ssh-keygen -L [-f input_keyfile]
       ssh-keygen -A [-a rounds] [-f prefix_path]
       ssh-keygen -k -f krl_file [-u] [-s ca_public] [-z version_number]
                  file ...
       ssh-keygen -Q [-l] -f krl_file [file ...]
       ssh-keygen -Y find-principals -s signature_file -f allowed_signers_file
       ssh-keygen -Y check-novalidate -n namespace -s signature_file
       ssh-keygen -Y sign -f key_file -n namespace file ...
       ssh-keygen -Y verify -f allowed_signers_file -I signer_identity
       		-n namespace -s signature_file [-r revocation_file]

ssh-keyscan

Gather SSH public keys from servers

root@kali:~# ssh-keyscan -h
unknown option -- h
usage: ssh-keyscan [-46cDHv] [-f file] [-p port] [-T timeout] [-t type]
		   [host | addrlist namelist]

openssh-server

This is the portable version of OpenSSH, a free implementation of the Secure Shell protocol as specified by the IETF secsh working group.

Ssh (Secure Shell) is a program for logging into a remote machine and for executing commands on a remote machine. It provides secure encrypted communications between two untrusted hosts over an insecure network. X11 connections and arbitrary TCP/IP ports can also be forwarded over the secure channel. It can be used to provide applications with a secure communication channel.

This package provides the sshd server.

In some countries it may be illegal to use any encryption at all without a special permit.

sshd replaces the insecure rshd program, which is obsolete for most purposes.

Installed size: 1.52 MB
How to install: sudo apt install openssh-server

  • adduser
  • debconf | debconf-2.0
  • dpkg
  • libaudit1
  • libc6
  • libcom-err2
  • libcrypt1
  • libgssapi-krb5-2
  • libkrb5-3
  • libpam-modules
  • libpam-runtime
  • libpam0g
  • libselinux1
  • libssl1.1
  • libsystemd0
  • libwrap0
  • lsb-base
  • openssh-client
  • openssh-sftp-server
  • procps
  • runit-helper
  • ucf
  • zlib1g
sshd

OpenSSH daemon

root@kali:~# sshd -h
option requires an argument -- h
OpenSSH_8.4p1 Debian-6, OpenSSL 1.1.1l  24 Aug 2021
usage: sshd [-46DdeiqTt] [-C connection_spec] [-c host_cert_file]
            [-E log_file] [-f config_file] [-g login_grace_time]
            [-h host_key_file] [-o option] [-p port] [-u len]

openssh-sftp-server

This is the portable version of OpenSSH, a free implementation of the Secure Shell protocol as specified by the IETF secsh working group.

Ssh (Secure Shell) is a program for logging into a remote machine and for executing commands on a remote machine. It provides secure encrypted communications between two untrusted hosts over an insecure network. X11 connections and arbitrary TCP/IP ports can also be forwarded over the secure channel. It can be used to provide applications with a secure communication channel.

This package provides the SFTP server module for the SSH server. It is needed if you want to access your SSH server with SFTP. The SFTP server module also works with other SSH daemons like dropbear.

OpenSSH’s sftp and sftp-server implement revision 3 of the SSH filexfer protocol described in:

http://www.openssh.com/txt/draft-ietf-secsh-filexfer-02.txt

Newer versions of the draft will not be supported, though some features are individually implemented as extensions.

Installed size: 137 KB
How to install: sudo apt install openssh-sftp-server

  • libc6
  • libssl1.1
  • openssh-client

openssh-tests

This package provides OpenSSH’s regression test suite. It is mainly intended for use with the autopkgtest system, though can also be run directly using /usr/lib/openssh/regress/run-tests.

Installed size: 5.43 MB
How to install: sudo apt install openssh-tests

  • libc6
  • libselinux1
  • libssl1.1
  • openssh-client
  • openssh-server
  • openssh-sftp-server
  • openssl
  • putty-tools
  • python3-twisted
  • zlib1g

ssh

This metapackage is a convenient way to install both the OpenSSH client and the OpenSSH server. It provides nothing in and of itself, so you may remove it if nothing depends on it.

Installed size: 262 KB
How to install: sudo apt install ssh

  • dpkg
  • openssh-client
  • openssh-server

ssh-askpass-gnome

This has been split out of the main openssh-client package so that openssh-client does not need to depend on GTK+.

You probably want the ssh-askpass package instead, but this is provided to add to your choice and/or confusion.

Installed size: 294 KB
How to install: sudo apt install ssh-askpass-gnome

  • libc6
  • libglib2.0-0
  • libgtk-3-0
  • libx11-6
  • openssh-client | ssh

Updated on: 2021-Oct-14