Home / server / Questions / 213224
Accepted
ICTdesk.net
Asked: 2010-12-17 02:22:04 +0800 CST

Check OpenSSH version and update instructions on FreeBSD system

  • 772

On a FreeBSD system (8.1), I am looking for instructions on how to check the running version of OpenSSH and also instructions on the best way to download install an update of OpenSSH

ssh freebsd

4 Answers

  1. Best Answer

    Run sshd -V or ssh -V and they'll return the version and usage information.
    Note: These are capital "V" now, when I originally wrote this answer they were lower case.

    There's a dozen ways to upgrade.

    • pkg-add -r openssh-portable
    • cd /usr/ports/security/openssh && make install clean
    • portupgrade security/openssh-portable
    • part of the makeworld/buildworld process
    • freebsd-upgrade
    • and the list goes on...

    I'm not aware of any issues with the 5.2p1 version that shipped with 8.1-RELEASE. I have seen hoax e-mails flying around for over a year now announcing the imminent release of a zero day hack (note that it's been a year and a half since release, so 'zero' day was a heck of a long time ago).

    • 90 
  2. telnet localhost 22

    Why do you want to upgrade OpenSSH? It's part of the core system and is usually upgraded with the system.

    • 5

  3. How to find openssh version on a Linux or Unix-like system?

    The syntax is as follows to find openssh version on a CentOS/RHEL/SL:

    # yum list installed openssh\*

    The syntax is as follows to find openssh version on a Debian/Ubuntu Linux:

    $ dpkg --list | grep openssh
### OR ###
$ dpkg --list openssh\*

    Sample output

    • 4

  4. Try running:

    which sshd

    If that prints /usr/sbin/sshd, then it's probably installed as a package. In that case, you can check the installed version using:

    pkg_info | grep ssh

    or:

    pkg_info -W `type sshd`

    And I think you update it using:

    pkg_add -r openssh-portable

    but read the FreeBSD Guide to the Packages System first, because I haven't done that in a long time and it might have changed.

    If

    which sshd

    prints /usr/local/sbin/sshd, then it's probably installed as a port.

    Read up on how to upgrade it in the Guide to Using the Ports System. The port name is security/openssh-portable, i.e. /usr/ports/security/openssh-portable.

    • 3