73

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

Improve this question

4 Answers 4

Reset to default
101

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).

Improve this answer
3
  • Agree with everything, except 8.1-RELEASE has OpenSSH 5.4p1.
    – hmallett
    Commented Dec 16, 2010 at 20:56
  • 2
    I needed to use ssh -V (note capital v) as on my system (and I thought this was standard) the -v option is used for verbose (iirc).
    – Mike H-R
    Commented Nov 13, 2014 at 10:38
  • @MikeH-R Thanks, not sure when it changed, but it's definitely capital V now.
    – Chris S
    Commented Nov 13, 2014 at 14:44
5 
telnet localhost 22

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

Improve this answer
2
  • This assumes your running the daemon.
    – Chris S
    Commented Dec 16, 2010 at 16:30
  • Awesome answer. Exactly what I was looking for. I always run the daemon
    – benathon
    Commented Jan 27, 2014 at 21:12
4

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

Improve this answer
3

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.

Improve this answer
2
  • 1
    Of course, if you really wanted the running version rather than the installed version, you could also try "telnet localhost 22", and look for the version number. The version number is the second number, i.e. the number after "OpenSSH_".
    – Mikel
    Commented Dec 16, 2010 at 11:36
  • See also geekvenue.net/chucktips/jason/chuck/1044986336/index_html
    – Mikel
    Commented Dec 16, 2010 at 11:53

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .