Episode 096 – Surprise

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Un-edited Live session –

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Summary

Kernel News: Mat Time: Distro Talk: Tony Time: Mary Distro Review Time: Tech News: Time: Toolbox Time: Is it Alive? - Mary Time: Listener Feedback Time: Outtro Music Time:

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Intro:

Tony Bemus, Mat Enders, and Mary Tomich Sound bites by Mike Tanner

Kernel News: Mat

Time: Release Candidate: On Sun, 4 Aug 2013 14:09:12 PDT Linus Torvalds released 3.11-rc4 And this is what he had to say about it: “It's that time of the week again.. "You apply 339 patches, what do you get Another week older and deeper in debt Saint Peter don't you call me 'cause I can't go I owe my soul to the company store" I had hoped things would start calming down, but rc4 is pretty much exactly the same size as rc3 was. That said, the patches seem a bit more spread out, and less interesting - which is a good thing. Boring is good. Let's keep it that way, and try to make for fewer patches for -rc5, ok? Because we are past half-way now, and I really want to see just fixes. We've got some arch updates (arm, parisc), but most of this is drivers (mostly networking, usb and some drm updates). There's also some core networking changes. And the printk code movement looks big if you don't do git renames (ie like the patches I upload).” --Linus Torvalds Mainline: 3.11-rc4 Stable Updates: Kernel Developer Quote: Comes from Greg Kroah-Hartman “What's worse than having a coworker call your cell phone, and have it wake you up because you are half-way around the world and it's the middle of the night? Having them do it again the next day, same exact time, both times not leaving messages. Guess it really wasn't that important... There's got to be an option on stock Android to block specific numbers, right? I can't seem to find it anywhere...” --Greg Kroah-Hartman

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Distro Talk: Tony

Time: Distrowatch.com

• 5-22 -
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Distro of the Week: Tony

5. Fedora - 1815
4. LuninuX - 1834
3. Ubuntu - 2534
2. Mageia - 3194
1. Mint - 5157

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Mary Distro Review

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Tech News:

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The Toolbox

Time: Using rsync Lets learn a little about rsync by breaking this command down: time rsync -e 'ssh -c arcfour128 -o Compression=no -a' -avx --progress [User]@[Server you are getting the data from]:/remote/directory/ /local/directory/ The time command at the beginning is just going to give us a nice little summary at the end to tell us how long it took. It will look something like this: real 33m1.060s user 8m27.190s sys 5m48.056s rsync This the main command that is going to synchronize our remote directory with our local one -e This option to rsync lets us choose the remote shell program that rsync will use to make the connection. You need to follow this with the remote shell you are using. Now we are are going to take a little side trip to explain the remote shell command we are using. In this case it is ssh with some options which is why it is enclosed in single quotes. 'ssh -c arcfour128 -o Compression=no -ax' ssh This is the type of remote shell we wish to use. It is a good idea to run the rsync inside some sort of secure tunnel some a casual observer can not steal the data. -c arcfour128 This switch lets us set the type of encryption to use, and must be immediately followed by the cipher to use. Through testing we have discovered that arcfour128 is the fastest. However arcfour128 may not always be available then we fall back to blowfish. -o Compression=no The -o option is used to give options like they were in the config file. It is useful for when the is no direct option for what you want. Here we are telling it to use no compression. We have found that using compression actually slows the process down because of the time to compress then uncompress the data. -a The -a option disables forwarding of the authentication agent connection. Because you don’t your ssh connection forwarded elsewhere. If you are doing this on workstations that run X adding -x option is also a good idea. This disables forwarding of the X server. Now on with the rsync: -avx The -a option is for archive mode. This will keep all of the permissions and attributes of the files intact. The -v option tells it to be verbose. In other words list all the files as you transfer them. then we also use the -x option which means do not cross filesystem boundaries. Since rsync works recursively by default this keeps it from crossing into seperate partitions. For example if you were sync’ing the root partition and /var, /usr, and /home were on separate partitions it will make directories matching those names but will not descend into them and copy the underlying data. --progress This shows us the progress of the files as they are transferred. If they are all relatively small files this is not useful, however when the files get to be large in size it is helpful so you do not think the process has stalled. If this is not the first time you have run this or the way I do for my backups, once a year is add the --delete option then everything that has been deleted in the source location is deleted in the destination location, as rsync does not do this automatically. [User]@[Server you are getting the data from]:/remote/directory/ /local/directory/ And lastly the server and the directory we want to backup, and the user we want to do it as. Then the local directory to send the data to.

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Is it Alive?

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Listener Feedback:

show (at) smlr.us or 313-626-9140 Time:

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Outtro Music

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