If you have installed samba/cifs-utils/etc. and are trying to set your users up on a Debian 7 system, you might be surprised to find that the smbpasswd command seems to be missing. It’s actually part of the samba-common-bin package, which you can install via:
sudo apt-get install samba-common-bin
…and you should have your command.
If you are in a terminal and want to find the container IDs (CTID) quickly without opening up a browser, run the following:
vzlist
It should return a list of the container IDs, the VM state, their IP addresses and hostnames like so:
CTID NPROC STATUS IP_ADDR HOSTNAME
100 25 running 10.1.1.51 nyx.luna.com
101 17 running 10.1.1.65 euphrosyne.luna.com
102 58 running 10.1.1.22 metis.luna.com
103 15 running 10.1.1.25 curo.luna.com
104 52 running 10.1.1.60 ogmios.luna.com
Quick and easy.
If you’re trying to figure out why you are getting NFS errors despite having NFS set up properly on the host machine and client VM, this may be the answer. With the VM powered off, run at the Proxmox terminal:
vzctl set [VM ID] --features "nfs:on" --save
The next time the VM is powered up NFS should be enabled and you should be able to mount shares correctly. An example:
vzctl set 104 --features "nfs:on" --save
This one is straight-forward for CentOS, Ubuntu and others distros:
id -u [username]
e.g.
id -u bob
That will give a numeric result like 500 or 1001.
We helped rebuild a backup VM which receives data over rsync today; the first rsync attempt failed with the vague error message:
rsync error: error in rsync protocol data stream (code 12) at io.c(600) [sender=3.0.6]
The problem ended up being that the rsync package was not installed. A simple:
yum install rsync -y
…fixed the problem and shortly the backups were back to normal.
This one seems to be a common issue that people with children and pets encounter; a button-mashing session between said small being and the keyboard can sometimes leave your browser moving a cursor around the webpage when you press the arrow keys, instead of the keys scrolling the webpage up and down. Fortunately it’s an easy fix – it’s a selectable mode called caret browsing mode. Caret is another name for the cursor you see!
To enter or exit caret browsing mode, hit F7. That should resolve this issue straight away.
One of the most common things photographers use when it comes to editing images in Photoshop is the curves function. If you’re trying out Krita for the first time you may be looking for it – it’s in the following menu:
Filter -> Adjust -> Brightness/Contrast curve
The pop-up box should look familiar to those who have used curves in other editing applications:
We were asked how to set up a Fedora 20 virtual machine to access folders on an already-set-up Ubuntu Server machine using NFS. A folder has been created on the Fedora VM to mount the NFS share to (/opt/documents in this case). First we install the relevant packages on Fedora:
sudo yum install nfs-utils nfs-utils-lib
Examine the package list, and if nothing looks awry hit Y to install. Now edit your fstab and add this line to the bottom to automount the shares:
[ip.of.nfs.server]:[absolute-path-to-share] [absolute-path-to-fedora-mount-point] nfs auto 0 0
e.g., in this example:
10.1.1.3:/tank/documents /opt/documents nfs auto 0 0
To break this down: the static IP address of the NFS server is 10.1.1.3, the path on the Ubuntu machine to the share is /tank/documents, and the created directory to mount the NFS share to is /opt/documents on the Fedora VM. To mount everything in fstab, run:
mount -a
Then navigate to the /opt/documents directory and check that you can read/write onto the NFS share correctly. Reboot the server to make sure everything works OK and you should be done!
First, we install the required packages:
sudo apt-get install gphoto2 libgphoto2-6
Once that’s done installing, plug in your camera via it’s USB port and check that it is visible to the system:
lsusb
You should see an output along the lines of:
Bus 002 Device 002: ID 8087:8000 Intel Corp.
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 8087:8008 Intel Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 008: ID 051d:0002 American Power Conversion Uninterruptible Power Supply
Bus 003 Device 007: ID 046b:ff31 American Megatrends, Inc.
Bus 003 Device 006: ID 046b:ff40 American Megatrends, Inc.
Bus 003 Device 005: ID 046b:ff20 American Megatrends, Inc.
Bus 003 Device 004: ID 046b:ff10 American Megatrends, Inc. Virtual Keyboard and Mouse
Bus 003 Device 002: ID 046b:ff01 American Megatrends, Inc.
Bus 003 Device 009: ID 04a9:323a Canon, Inc.
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
You may have less or a lot more, depending on your system and how many USB devices you have connected. Assuming you have no other Canon devices connected, the part you’re looking for will have Canon in the line – here:
Bus 003 Device 009: ID 04a9:323a Canon, Inc.
You can also check using the dmesg command – once you have connected the camera there will be output at the end similar to:
[1798492.201275] usb 3-10: new high-speed USB device number 9 using xhci_hcd
[1798492.218967] usb 3-10: New USB device found, idVendor=04a9, idProduct=323a
[1798492.218975] usb 3-10: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[1798492.218980] usb 3-10: Product: Canon Digital Camera
[1798492.218984] usb 3-10: Manufacturer: Canon Inc.
Now we can run the following command:
gphoto2 –get-config /main/status/shuttercounter
You should then see the shutter count:
Label: Shutter Counter
Type: TEXT
Current: 31791
For this Canon 5D Mark III, the shutter count is 31,791. Lightly used!
To see a list of supported cameras for this method, see:
http://gphoto.org/proj/libgphoto2/support.php
While it is unsupported, it can sometimes be quite handy to install additional packages on your XenServer 6.2 system – things like vim, iptraf, perhaps even denyhosts. By default extra packages you wish to install are likely disabled, but using yum we can temporarily allow access to the CentOS packages. Logging in as root and using yum we can:
yum –enablerepo=base –disablerepo=citrix install [packagename]
yum –enablerepo=base –disablerepo=citrix install denyhosts