To check the version of Samba that you are running, use the smbstatus command. The first line is the version, which should look something like:
Samba version 3.6.3
If you want to see just the version without the rest of the smbstatus information, you can run:
smbstatus –version
Much less cluttered. The above is the current version for a 12.04 Ubuntu server. Still waiting for version 4!
If you’re remotely logging in to a server to apply the latest patch but can’t remember whether you’re running 4, 4.1, 5.0 or 5.1 – and it can certainly happen when you’re managing quite a few of them remotely – there is a handy command to see which version and build number you’re actually using. After you’ve SSH’d in, run:
vmware -v
This will display output along the lines of the following:
VMware ESXi 5.0.0 build-469512
You can also use:
vmware -l
which doesn’t display the build number:
VMware ESXi 5.0.0 GA
Straightforward but very handy if you haven’t got the proper notes with you.
This is a question that crops up fairly regularly, as different operating systems support different zpool versions. Fortunately, it’s quite easy to find out which versions you are running – simply run:
# zpool upgrade
If you want a more detailed readout, including the features of the pool version you have, try:
# zpool upgrade -v
Your output should look something like this:
# zpool upgrade -v
This system is currently running ZFS pool version 28.
The following versions are supported:
VER DESCRIPTION
— ——————————————————–
1 Initial ZFS version
2 Ditto blocks (replicated metadata)
3 Hot spares and double parity RAID-Z
4 zpool history
5 Compression using the gzip algorithm
6 bootfs pool property
7 Separate intent log devices
8 Delegated administration
9 refquota and refreservation properties
10 Cache devices
11 Improved scrub performance
12 Snapshot properties
13 snapused property
14 passthrough-x aclinherit
15 user/group space accounting
16 stmf property support
17 Triple-parity RAID-Z
18 Snapshot user holds
19 Log device removal
20 Compression using zle (zero-length encoding)
21 Deduplication
22 Received properties
23 Slim ZIL
24 System attributes
25 Improved scrub stats
26 Improved snapshot deletion performance
27 Improved snapshot creation performance
28 Multiple vdev replacements
For more information on a particular version, including supported releases,
see the ZFS Administration Guide.
Or for the more simple command:
# zpool upgrade
This system is currently running ZFS pool version 28.
All pools are formatted using this version.