Category Archives: Unixy

Ubuntu USB Ethernet Naming for Alias and VLAN Interfaces

In my ongoing adventures of playing with the Chromebox as a firewall, I eventually found a reason to use stock Ubuntu 16.04 instead of VyOS.

For the most part, devices just work as you’d expect under Ubuntu. Even my USB ethernet network interface (NIC) devices work fine. But I eventually noticed a problem.

By default USB NICs under Ubuntu 16.04 (which uses systemd & udev) are named “enxABCDEF123456” where ABCDEF123456 is the full MAC address of the device.

This is fine for basic usage, but problems occur when you want to use device aliasing or VLAN tagging.

As an example, a standard USB interface definition would look like this in /etc/network/interfaces:

iface enxABCDEF123456 inet static

Linux interface aliasing lets you add another IP to the same device like by adding another entry with a colon plus integer (eg, :1 or :10). The aliased device can be treated as a unique device for ifup/ifdown, etc. It looks like this:

iface enxABCDEF123456:1 inet static

You can add VLAN tagging to an interface very simply in a similar way. It’s done by adding a dot/period plus integer (eg, :100 or :201) and referencing the parent “raw” device. The aliased device can be treated as a unique device for ifup/ifdown, etc. It looks like this:

iface enxABCDEF123456.201 inet static
    vlan-raw-device enxABCDEF123456

Looks good, right? Nope! Guess what, this isn’t going to work as is!

If you actually try to bring up one of these devices, you’ll see this.

$ sudo ifup enxABCDEF123456.201
RTNETLINK answers: Numerical result out of range
Failed to bring up enxABCDEF123456.201.

Turns out this is due to the (very long) length of the device name. Actually, someone already filed a bug for this with Ubuntu:


So, what to do? There’s a reasonably simple solution, but it took some searching to figure it out.


First, if you just read docs about systemd you’ll see a seemingly “obvious” way to name devices by mapping the MAC address. This creates a file which should rename the device enxABCDEF123456 to enx0.

cat > /etc/systemd/network/ << EOF


It seems good, but doesn’t work by itself.. the trick is that udev is also at work tweaking the NIC device names.

Per the systemd man page:

All link files are collectively sorted and processed in lexical order, regardless of the directories in which they live. However, files with identical filenames replace each other. Files in /etc have the highest priority, files in /run take precedence over files with the same name in /usr/lib. This can be used to override a system-supplied link file with a local file if needed. As a special case, an empty file (file size 0) or symlink with the same name pointing to /dev/null disables the configuration file entirely (it is “masked”).

This gave me the idea that masked files may also be at play with udev…. the file which directs udev to name USB devices with full MAC address is /lib/udev/rules.d/73-usb-net-by-mac.rules so I’ll attempt to mask it in in /etc.

ln -s /dev/null /etc/udev/rules.d/73-usb-net-by-mac.rules
update-initramfs -u

Note that udev and systemd rules, need to be in the initfamfs, so that has to be updated before rebooting for the changes to take effect.


Oh, of course, now if I was depending on that USB NIC, I just lost networking because my /etc/network/interfaces is invalid. So based on the examples above, here’s a snapshot of what the that file should now look like:

iface enx0 inet static

iface enx0:1 inet static

iface enx0.201 inet static
 vlan-raw-device enx0

Now, the base USB interface, the alias interface, and the VLAN interface should all work!

VyOS on an Asus Chromebox M004U

This is a bit of a follow up from my last post. I’ve still got my Asus Chromebox. I’m not running ESXi any more… but something I do want to try out is VyOS. Why? Well, my original intent when purchasing the Chromebox was to play around with it, but then I really did expect it to replace my home router. I’ve used pfSense for a long time, but I’m curious about VyOS because I know several people using EdgeRouter Lite which uses EdgeOS, a fork of VyOS. So I wanted to play around on existing hardware.

Note: everything below assumes your Chromebox has custom firmware for installing any OS you choose (see last post).

Turns out though, VyOS isn’t quite ready for installing on UEFI systems. And the Chromebox is… well… sort of UEFI, even though it uses SeaBIOS. Also, while most UEFI systems have a management screen where you can configure legacy mode, the Chromebox is a bit more limited in how we can work around its oddities.

Bottom line, VyOS installer would not boot directly on the Chromebox. I wasn’t thinking “UEFI is the problem” when I first hit the boot issue; I assumed it was an issue with USB 3. After much poking and prodding, I was able to get it running. But it was tricky enough, I figured I should document the process.

Install VyOS

First things first, you’ll need another system, a BIOS system, on which you can install VyOS. This doesn’t have to be a physical computer. VyOS is very often used in virtualized environments. In my case, all initial testing was done on a physical BIOS machine, but for proving out a second round of tests, and to aid in documentation for this blog, I did another install using a VMware machine for my starting system.

I used both the 1.1.7 stable and 1.2.0-beta1 releases for my testing, but always 64-bit ISO installations. I didn’t use any pre-made images.

Using VMware (etc), it’s super easy to install. I used a VM with 1GB of RAM and 10GB of hard disk. I removed most extra devices, as we don’t need them, but I did keep the USB controller. Note: 10GB hard drive was chosen to be sure it is smaller than the 16GB SSD in the Chromebox; it may not matter in the long run but makes me feel safer.

Once you have a VM created, and the ISO downloaded, boot and follow the VyOS install guide.

Quick summary:

  1. boot
  2. login as vyos
  3. run install image
  4. use default config
  5. set password for vyos user to something
  6. auto partition disk sda using whole 10GB of disk
  7. install grub to sda
  8. DONE

Reboot to make sure it boots. Huzzah!


We aren’t going to clone in a traditional sense, no Ghost or Clonezilla… nope. We’re just going to take the bits we need. First, we need a rescue disk to boot from. I’m a long time fan of SystemRescueCD as it has lots and lots of useful tools, can cache itself 100% into RAM, and has a decent X Windows setup available if you need it.

So, download the latest ISO of SystemRescueCD. Before we go any further, make a bootable USB thumb drive from this. The easiest way is to be running Linux already, mount the ISO image, and run the script. On Windows you can try using Rufus, which I use when on Windows. On OSX, well… dd might work.

OK, set the SystemRescueUSB aside for now…

Copy the Disk

Now we are ready to clone the disk. Configure the ISO image as your bootable drive in your VyOS VM, then boot it up. You may need to be quick on the “ESC” key to get into the boot menu. The default SystemRescueCD boot option should be fine.

Once you are sitting at a shell prompt, insert that SystemRescueUSB drive you made. You’ll want to make sure it’s connected to the VM, not your host system.

[email protected] /root % fdisk -l /dev/sdb
Disk /dev/sdb: 15 GiB, 16079781888 bytes, 31405824 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x0002f767

Device Boot Start End Sectors Size Id Type
/dev/sdb1 * 1 31405823 31405823 15G c W95 FAT32 (LBA)

It’s connected, so mount it up, and create a place to store our VyOS stuff

mkdir /mnt/usb && \
mount /dev/sdb1 /mnt/usb && \
mkdir /mnt/usb/VYOS && \
cd /mnt/usb && \
boot bootprog ntpasswd syslinux sysrcd.md5 version
bootdisk efi readme.txt sysrcd.dat usb_inst usbstick.htm VYOS

Now, copy out the MBR, which holds both the partition table and the bootloader.

dd if=/dev/sda of=/mnt/usb/VYOS/mbr.img bs=512 count=1
1+0 records in
1+0 records out
512 bytes (512 B) copied, 0.00109355 s, 468 kB/s

Sweet… now make a copy of the filesystem.

mkdir /mnt/disk && \
mount /dev/sda1 /mnt/disk && \
cd /mnt/disk && \
tar -zcf /mnt/usb/VYOS/1.1.7/rootfs.tar.gz boot && \
ls -lh /mnt/usb/VYOS 
total 233M
-rwxr-xr-x 1 root root 512 Aug 4 04:47 mbr.img
-rwxr-xr-x 1 root root 232M Aug 4 04:50 rootfs.tar.gz

Excellent! sync for good measure, then unmount and remove the USB drive.

sync && umount /mnt/usb

We are done with the VM for now, but it doesn’t hurt to leave it around in case you want to inspect something.

Paste the Disk

Now, lets pull out the physical Chromebox.

Insert the SystemRescueUSB drive and power it up. Again the the default SystemRescueCD boot option is fine, but if you choose the second (docache), you’ll need to manually mount the USB drive. Using the default, our USB drive is now auto-mounted to /livemnt/boot .

We can verify, since a stock SystemRescueCD won’t have our VYOS stuff.

ls -lh /livemnt/boot/VYOS
total 233M
-rw-r--r-- 1 root root 512 Aug 4 04:47 mbr.img
-rw-r--r-- 1 root root 232M Aug 4 04:50 rootfs.tar.gz


First, nuke existing partition maps. You’ll have to tell it you want a DOS disk label, then arrow over to “Write” to save the partition map.

cfdisk -z /dev/sda

Restore the VM’s MBR.

dd if=/livemnt/boot/VYOS/mbr.img of=/dev/sda bs=512 count=1
1+0 records in
1+0 records out
512 bytes (512 B) copied, 0.00135381 s, 378 kB/s
fdisk -l /dev/sda
Disk /dev/sda: 14.9 GiB, 16013942784 bytes, 31277232 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x000ce790

Device Boot Start End Sectors Size Id Type
/dev/sda1 * 2048 20971519 20969472 10G 83 Linux

Create a filesystem on this partition. Note: I had some trouble with SystemRescueCD’s ext4 fs utils creating a version of ext4 that was too new for the older utils/kernel of VyOS, so I went simple here and used ext3.

mkfs.ext3 -j /dev/sda1
mke2fs 1.42.13 (17-May-2015)
/dev/sda1 contains a file system
Proceed anyway? (y,n) y
Discarding device blocks: done 
Creating filesystem with 2621184 4k blocks and 655360 inodes
Filesystem UUID: d2e311fc-bf9e-4f40-b88a-a9047c969255
Superblock backups stored on blocks: 
 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632

Allocating group tables: done 
Writing inode tables: done 
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done

Lay down our copy of the VM filesystem.

mkdir /mnt/disk && \
mount /dev/sda1 /mnt/disk && \
cd /mnt/disk && \
tar zxf /livemnt/boot/VYOS/rootfs.tar.gz && \
boot lost+found

So far this has been pretty simple way to copy any Linux file system and partition map. Now its time to do the magic required to get this to boot on the Chromebox.

If you were to reboot right now, you’d get a lovely grub rescue> console, and you wouldn’t be able to boot VyOS.

Convert to GPT Magic

First, unmount that disk again, so we are able to work with it.

cd /root && umount /mnt/disk

Use gdisk to write GPT version of the MBR data we currently have. Choose “1” to use MBR as authoritative ( you MAY not be asked this ), then “w” to write the new GPT data.

gdisk /dev/sda
GPT fdisk (gdisk) version 1.0.1

Partition table scan:
 MBR: MBR only
 BSD: not present
 APM: not present
 GPT: present

Found valid MBR and GPT. Which do you want to use?
 1 - MBR
 2 - GPT
 3 - Create blank GPT

Your answer: 1

Command (? for help): w

Final checks complete. About to write GPT data. THIS WILL OVERWRITE EXISTING

Do you want to proceed? (Y/N): y
OK; writing new GUID partition table (GPT) to /dev/sda.
The operation has completed successfully.

Now we need to add an ESP (EFI System Partition) and BIOS compatibility boot/grub partition.

parted /dev/sda unit MiB print
Model: ATA SanDisk SSD U110 (scsi)
Disk /dev/sda: 15272MiB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags:

Number Start End Size File system Name Flags
 1 1.00MiB 10240MiB 10239MiB ext3 Linux filesystem

This shows us where we can start adding partitions, 10239MiB. So we add to next mega byte location the ESP, then one more for our BIOS boot part.

parted /dev/sda mkpart primary fat32 10240MiB 10241MiB 
Information: You may need to update /etc/fstab.

parted /dev/sda mkpart primary fat32 10241MiB 10441MiB 
Information: You may need to update /etc/fstab.

parted /dev/sda set 2 bios_grub on set 2 msftdata off 
Information: You may need to update /etc/fstab.

parted /dev/sda set 3 boot on set 3 msftdata off set 3 esp on
Information: You may need to update /etc/fstab.

parted /dev/sda unit MiB print 
Model: ATA SanDisk SSD U110 (scsi)
Disk /dev/sda: 15272MiB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags: 

Number Start End Size File system Name Flags
 1 1.00MiB  10240MiB 10239MiB ext3  Linux filesystem
 2 10240MiB 10241MiB 1.00MiB        primary    bios_grub
 3 10241MiB 10442MiB 201MiB   fat16 primary    boot, esp

mkfs.vfat /dev/sda2
mkfs.fat 3.0.28 (2015-05-16)

mkfs.vfat /dev/sda3
mkfs.fat 3.0.28 (2015-05-16)

Install Grub

Now we need to unsquash the filesystem image used by VyOS so we can re-install the right version of grub.

mount /dev/sda1 /mnt/disk && \
cd /mnt/disk && \
unsquashfs boot/1.1.7/1.1.7.squashfs 
Parallel unsquashfs: Using 2 processors
32494 inodes (34238 blocks) to write

[===============================================================================================================================-] 34238/34238 100%

created 30398 files
created 9824 directories
created 1457 symlinks
created 37 devices
created 1 fifos

ls squashfs-root
bin boot dev etc home lib lib64 media mnt opt proc root sbin selinux srv sys tmp usr var

Let’s bind some system dirs and install grub (the version from VyOS, not SystemRescueCD)!

mount -o bind /dev /mnt/disk/squashfs-root/dev
mount -o bind /proc /mnt/disk/squashfs-root/proc
mount -o bind /mnt/disk/boot /mnt/disk/squashfs-root/boot 
chroot /mnt/disk/squashfs-root /bin/bash
# grub-install /dev/sda
Installation finished. No error reported.

PHEW! That wasn’t so hard, was it? ūüôā

Let’s cleanup the mounts, reboot, and see what happens.

umount squashfs-root/boot
umount squashfs-root/proc
umount squashfs-root/dev 
cd .. && umount disk


Don’t forget you’ll need to remove the USB drive before rebooting.

When booting the Chromebox I now get a VyOS boot and login.

ESXi on an Asus Chromebox M004U

I recently stumbled across the ASUS CHROMEBOX-M004U. It’s a Chromebox, which is cool in its own right, but I was interested in using it’s dual-core Celeron Haswell CPU, expandable RAM (up to 16GB), and M2 Sata storage for other purposes.

First things first, you’ve got to enable the box to run things other than ChromeOS… Thankfully that’s well documented (¬†), so I won’t go into detail at this time. But¬†I will say, I used the standalone, custom coreboot firmware and chose the headless option, as my current planned use cases are for servers. Apparently you want non-headless if you plan to use the box as a Plex Home Theater or Kodi box. Oh, also, I set it to boot first from USB if ¬†available.

Now the Chromebox will boot happily from it’s internal SSD or USB if attached.

Time for ESXi! I haven’t been blogging much in the past couple years, but I have been doing a lot of home work with virtualization, ESXi, vSPhere, ZFS, SmartOS, OmniOS… so at this point I’ve got a bunch of crazy tech projects going on at home.

First, you need an ESXi installer ISO image… I’m using ESXi 5.5u2 ¬†and it’s freely available from¬†VMware… You probably have to register to get it. 6.0 is out now, but I haven’t made that jump. However, while 6.0 DOES have USB3/xhci driver, even the latest ISO for 5.5 does not… Even though the matrix of VIB versions per release¬†¬†shows later versions which have it. So we’ll have to add that/upgrade after install. (Also, this is helpful information about that matrix:¬†

Second, we need to customize our installer to have non-standard packages for this machine.

I’ve been using ESXi Customer:¬†

And, you’ll need¬†to get some custom VIBs (drivers/configs)… you need the following 2, and you want the offline-bundle versions

To customize, you use a source ISO and add an offline bundle… ESXi Customer only does one VIB at a time… so after it gives you one customized ISO, rename it, then use it as the source, and add the second VIB.

Now, you are ready to install… ¬†We will install to a different, better supported machine, ensuring your install is good to go, then move to the Chromebox.¬†

Using your custom ISO burned to a USB flash drive (various tools to do that, on windows I use Rufus), install to a target USB flash drive at least 8GB (not the one you are installing from). Installing can take some time, so be patient. Also, make sure you only install to the desired, target flash drive, not your hard drive or something. ūüôā

Once installed, remove the installer flash drive, and boot from the target ESXi flash drive. Again, it takes a while.

Now we have a few configuration steps.

First, we’ll use F2, to customize the system… navigate to troubleshooting options… press enter on “Enable SSH” ( screenshots here:¬† )
For the rest of the steps, SSH into your ESXi machine, it should be displaying it’s IP on the screen.

Second, we need to fix a network setting.¬†By default, the vmk0 (virtual NIC created on which the DHCP client runs) will do a one-time clone of the MAC HW address of your system’s NIC, so you’ll need to fix this, else when booting the USB in a different machine, the installation will boot with the original machine’s MAC… it will CONFLICT with your original machine, you’ll have network issues, including using same IP if you have DHCP static addresses, etc.

esxcfg-advcfg -s 1 /Net/FollowHardwareMac

more detail from:

Third,¬†you need to install and make sure that USB3/xhci gets loaded at boot…

esxcli network firewall ruleset set -e true -r httpClient
esxcli software profile update -d -p ESXi-5.5.0-20141004001-standard
esxcli system module set -e true -m xhci

and add following to /etc/rc.local.d/  :

vmkload_mod xhci

more detail from:

Finally, you should be able to shutdown, remove the USB flash drive with ESXi on it, ¬†put into Chromebox, and boot. And it should come up with it’s own HW MAC, IP, etc, have access to update its own config on its USB drive, and be able to use an attached keyboard.

SSH to new ESXi IP and/or use the vSphere Client to manage as normal.

Killing “find” Errors

I’ve used the unix filesystem search utility find for many years. Though, like most things, until forced to learn its deeper secrets, I generally get by with only the most basic knowledge.

One of the cool things about find is that you can specify a search and then execute an action on the results, all in one command.

This example is probably my most common use of find:

find . -type d -name .svn -exec rm -fr {} \;

This means: find, in the current directory (.), a directory (-type d), named .svn (-name .svn), and for every result (-exec) remove that directory (rm -fr {}) .¬† The “{}” represents the matched path string, and the “\;” is required to end the “-exec” command.

Here’s a sample of what this looks like, including output:

$ find . -type d -name .svn -exec rm -fr {} \;
find: ./.svn: No such file or directory
find: ./getid3-2.0.0b4/.svn: No such file or directory
find: ./getid3-2.0.0b4/extras/.svn: No such file or directory
find: ./getid3-2.0.0b4/getid3/.svn: No such file or directory

This is great, and I’ve used this exact syntax for years. But today I ran into a problem. I wanted to run this exact command as part of a custom build script in Xcode. When this command ran I had 81 errors popup in my build results! What happened is that all thos “No such file or directory” messages are actually errors, and Xcode reported them as such.

The solution is to add one extra argument: -depth . This causes find to do a depth-first traversal of the sub-directories being searched. That is, find will check the contents of directories before acting (eg, running an -exec command) on the directory in question. The default is to act on the directory (in our case, removing it) before attempting to visit it’s contents. So after we removed the directory, find was still trying to look at it; -depth fixes that.

So, the final answer is, I now use:

find . -type d -name .svn -depth -exec rm -fr {} \;

Yes, this is a slightly verbose explanation for something so simple, but maybe it will help someone else.

VPN on Ubuntu Linux with Juniper Network Connect

There’s one standard document on HOWTO get Network Connect working on Ubuntu Linux. It’s mad scientist’s doc:¬† . However, there are a few things not covered. I’ll assume that you’ve followed mad scientist’s excellent guide before going any further.

Issue #1: 64-bit Ubuntu

By default, when you install java on your 64-bit system, you get a 64-bit java. No surprise there, right? Well, Juniper’s tools don’t play nice with 64-bit java. If you attempt to start the junipernc script you’ll promptly see the “VPN has failed!” error message.

VPN has failed!
VPN has failed!

Also if you look closely in your Terminal you’ll see the text error:

Failed to load the ncui library.

This is the clue that we are dealing with the 64-bit issue.

The work around for this is to install a 32-bit java on your system. Type the following into your Terminal:

sudo apt-get install ia32-sun-java6-bin

After typing your password, a 32-bit copy of java will be installed at: /usr/lib/jvm/ia32-java-6-sun .

Now, you need to convince Juniper Network Connect to use the 32-bit java. If you don’t use java for much besides your new VPN, you may just want to make the 32-bit java your default. This can be done by typing the following into your Terminal:

update-alternatives --set java /usr/lib/jvm/ia32-java-6-sun/jre/bin/java

If you DO use java and just want to tell the VPN to use the 32-bit java, you should modify the junipernc by adding the following line right after the block of lines that start with “#”:

export JDK_HOME=/usr/lib/jvm/ia32-java-6-sun

Now, when you run junipernc, it will use 32-bit java and you should no longer have the failure due to ncui.

Issue #2: Determining Your Realm

The scripting for Network Connect asks a few questions that may not make sense to a typical user. Even a networking savvy programmer may not be certain what values to use for the “Realm” or “PIN + SecureID Code”.

Finding your realm is fairly straight forward if you don’t mind diving into some HTML. Point your web browser to your company’s VPN website: or . ¬† View the source of that page and look for a line like:

<input type="hidden" name="realm" value="REALMNAME">

The value of REALMNAME is what you’ll need to enter when prompted. ¬†Your IT department may or may not know what this is if you ask them.

If you don’t know your “PIN + SecureID Code”, it’s simply the password you type along with your username on the VPN website to gain access. As mad scientist says, some companies use “SecurID so [they] enter a personal PIN plus the value provided by the SecurID fob,” which explains why he coded that as the prompt for the password input.

If you need help, there’s a long running thread over at the ubuntu forums where this continues to be discussed a lot:¬† . I gathered my info from both mad scientist’s page above and the thread itself.

One further note, I’ve tested this on Ubuntu 9.04 64-bit as well as 8.10 32-bit.¬†Hope this is helpful to all you who need Juniper VPN access on 64-bit Ubuntu Linux.

Foxmarks: Bookmark Synchronization Heaven

Long have I searched for the magic bullet solution to my bookmark synchronization woes.¬† I’ve wanted a simple plugin that would synchronize my bookmarks between multiple installations of Firefox and Safari, thus making it simple to access said bookmarks from any computer, or between the two commonly used browsers on my Mac.¬† I’ve looked at many options, but always the solution only allows me to sync one browser or the other, leaving me looking for some secondary sync tool to get between Firefox and Safari on my Mac itself, not via network or a proper sync.

I’d almost given up on finding a solution, then, a few months ago I started using Delicious. It was cool because there were plugins for Safari, Firefox, and IE, and of course, it’s by default a web based bookmarking system. Its cool, I like it, but I just didn’t use it much. The plugins integrate it into the browser by giving you ANOTHER bookmarks menu, not by integrating with the browsers’ bookmark system.

Before ever using Safari or Delicious, my Firefox bookmark sync tool of choice was Foxmarks. It provided a web interface for remote access to my bookmarks, plus a nice sync interface for all my Firefox installations. I was randomly poking around today and discovered that Foxmarks now works with Safari and IE! I was excited and wasted no time installing Foxmarks for Safari. So far, it works great!

For the most part, it works just as you’d expect, bookmarks sync between all my Safari(Mac only, for now, I think) and Firefox(Mac, Linux, and Windows) installations without hassle. I’ve yet to try out the Internet Explorer functionality, but I’m guessing it works pretty well. I just don’t use IE enough to care.

One caveat to be aware of: both Firefox and Safari use some browser specific URL syntax to access internal functionality for recent bookmarks, etc. That stuff will only work on the browser where it was created, Safari on Safari, Firefox on Firefox, etc. For me, that’s a non issue, I rarely use those features. I have tested and confirmed that javascript bookmarklets (like for Tinyurl and Cornify) do seem to work after syncing. Those are about the only reason I use on the bookmark menubar.

Use vi key bindings in bash

A long time ago I used ksh with vi key bindings, and life was good.

Then I moved on to bash, but for some reason, I never investigated using vi key bindings. I simply lived with the defaults (which, for the record, are emacs-like key bindings).

So, just the other day I said to myself, “Self, I want to use vi key bindings in bash. I want to again experience the joy of traversing and editing my command line in COMMAND MODE. I want the speed and the power of my precious vi (well, I use vim) at my finger tips. And I NO LONGER want to waste time holding arrow keys or to think about using emacs-like commands.”

So, I fired up; low and behold I stumbled onto this little post about using vi key bindings in bash and zsh. So sweet!

In a nutshell, the bash command to enable vi mode is:

set -o vi

This can be set in your .bashrc file, and if it doesn’t pickup when you start a new terminal session, add something like this to your .profile or .bash_profile:

if [ -f ~/.bashrc ]; then
. ~/.bashrc

With vi mode enabled, you’ll start your bash session in insert mode, so things should behave as normal. But, to turn on the power, just hit the ESC key to enter COMMAND MODE. ūüôā Now all your vi commands are availble. Move to end of line with “$”, beginning of line with “^”, delete a word with “dw”, etc.


Bonjour Avahi Addendum

A while back I wrote about advertising Linux services via Avahi/Bonjour. Since then I’ve made a few changes to my setup.

First, I nixed netatalk for direct AFP support. My primary reason for using it was to gain a more Mac-like network filesystem which would make Time Machine happier. Well, Time Machine uses a sparse bundle disk image on it’s target; after learning about that, using AFP seemed a bit unnecessary. Also, Samba CIFS/SMB seemed to perform better. I don’t have solid benchmarks for this, but simple file copies seemed to be consistenly faster with Samba. One of the biggest annoyances about netatalk was all the extra hidden files and folders it created. I run a hybrid network, I have more Mac machines, but also Windows, plus I browse file systems on the command line quite often; and those excess files pushed me over the edge.

Second, I nixed Time Machine. Just when I thought everything was working perfectly, it completely blew up and could no longer access its data store. Not good for a backup solution. I plan to write about my new home backup solution sometime, but it’s basically rsync with a few key points.

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Advertising Linux Services via Avahi/Bonjour

Update: most of this information is still correct but an update for combining service definitions into one file and setting an icon is available here:

In my last post I outlined how I followed others’ directions to enable netatalk on Linux and Time Machine backups to a shared AFP folder. Originally, I also described how to put all your shares on netatalk. I suppose if only have Mac clients or you REALLY want to use AFP, you can do so. As I worked with files over AFP shares, I started noticing that the performance seemed to be quite bad. No, I didn’t benchmark, but copying large video files to a shared folder over my gigabit network was substantially slower over AFP (netatalk) than over CIFS/SMB (samba). I use my network shares pretty heavily, so this was a concern. Also, netatalk tries very hard to replicate an HFS filesystem complete with resource fork support. This means that your shared directories end up with lots of extra folders named “.AppleDouble”(and a few others) containing Mac specific info. (Note: even on CIFS you’ll get the “.AppleDB” folders unless you disable a setting in Finder. I can deal with .AppleDB better than .AppleDouble AND .AppleDB) So, because of these two issues I decided to try using CIFS and samba again.
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Time Machine backup to Linux via Netatalk

So, when I got the upgrade from Tiger to Leopard on my MacBook Pro, I was looking for a good backup solution. I’ve used rsync in the past, but when I saw that Apple had a new Time Machine backup tool, I was curious to give it a shot. The catch is you basically needed an external USB or Firewire drive, until they recently came out with the Time Capsule. Anyway, tonight I got the itch to really see if I could make Time Machine work without buying extra hardware. I mean, seriously, I’ve got a good hunk of mirrored disk sitting on my home server; that seems like a good place to do backups.
Some googling found me this link to a blogger who’d done it!
I’ll make my own version of this post, since I had a few differences from the original I where I found the info.

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