May 2013 - luv-main - example.com

rsync and overwriting files
by Russell Coker 20 May '13

20 May '13

By default when rsync transferrs a file named foo it will create a temporary file named .foo-xxxx and then rename it over the previous file. The advantage of this is that there is an atomic operation replacing one version of the file with another. The disadvantage is that if you use a filesystem like BTRFS or ZFS with deduplication disabled (as you will do unless you have unusually large amounts of RAM to space) then creating a new file will break copy-on- write. I have some situations where I want to transfer backups of data to ZFS and BTRFS filesystems and not use excessive disk space by using multiple copies of database files. I'm aware of send/recv functionality, but it's not ready for use on BTRFS and on ZFS it requires that the sender be running ZFS. Can I make rsync overwrite files in place instead of recreating them? If so how? Yes I've read the rsync man page and didn't find it. No I didn't read through all 3446 lines (50+ A4 pages) of the man page, a search didn't find it. -- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/

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Terminal automation/macros
by Toby Corkindale 20 May '13

20 May '13

I just wondered.. are there any terminals*, plugins for terminals, or plugins for tmux, that will scan output and automatically send canned responses -- whilst still letting me interact normally the rest of the time? And secondly -- are there any tools that will simply let me assign hotkeys or macros to be automatically typed upon being pressed? That latter request seems simple, but I didn't get much joy when searching online for likely packages. Thanks Toby Footnotes: * By which I mean, gnome-terminal, xfce-terminal, mate-terminal, etc.

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Geelong LCA2015 bid for comment
by Kathy Reid 16 May '13

16 May '13

Hi everyone, David Bell is leading a bid for LCA 2015 in Geelong. The bid document is public, and we would like to now invite your comment, interest and participation. https://docs.google.com/document/d/1Go-T2XmwXiNshqpMkL_DmlgUmfUtHpozj-JcXMD… Kind regards, Kathy -- Kathy Reid @KathyReid on Twitter/Identi.ca/IRC etc XMPP: kathyreid(a)jabber.org.au 0418 130 636

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Debian 7.0.0 dvd's
by zlinw＠mcmedia.com.au 15 May '13

15 May '13

I am looking for a set (3 dvd's) of Debian 7.0.0 AMD64 iso images, I wonder if someone with plenty of data gigabytes spare could get this for me please. The preffered method is for me to post to the person concerned a portable drive and for them to download the images and copy them to the drive. To my dismay I found last time I did not include enough return postage. The reason to get the images and not the DVD's themselves is I have found the DVD/CD's are not a reliable means of storage. Now I do have broadband via the Virgin 3G mobile network (Optus is the carrier) but the data is $150 for 12 gig (Note 1), the 3 DVD images being around that size. The data on the images will be reconsitiuted back into a local Debian repository. Note 1: Its actually reasonably fast, the cost though is way to high for downloading large quantities of data. It being one of the prices for living in a quiet rural setting. Lindsay zlinw @mcmedia .com .au

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Re: Debian 7.0.0 dvd's
by zlinw＠mcmedia.com.au 15 May '13

15 May '13

Now just in case anyone is a little annoyed by my posts not following the mail threading. My mail set up is complex these days. The sending ISP and mail user program is different from the recieving ISP and mail user program....... A long story............... It is possible to use only one, it does require more "handstands" to do it that way, the current way is simpler and quicker. I do not use email much (only a couple of times a year) so I have never bothered to try and solve the issue. Lindsay

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Migrate Evolution To New Computer
by David Zuccaro 15 May '13

15 May '13

So my old computer is running debian squeeze with evolution 2.30.3. My new computer is running debian wheezy with evolution 3.4.4. What is the best way to migrate my mail folders and address book to the new computer? I tried copying across ~/.evolution and ~/.gconf/apps/evolution but that hasn't brought across the sub-folders or the different email accounts.

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gitlab
by Andrew Spiers 15 May '13

15 May '13

I've asked this question on the SAGE-AU mailing list, apologies for the redundant redundancy for those subscribed to both lists. Is anyone using or administering a gitlab instance? How are you finding it? Is the wiki functionality good, or more pain than it is worth? I'm considering binning a gitorious installation and migrating a few repositories over, has anyone done that?

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Re: CD/DVD Vendors (was Re: Debian 7.0.0 dvd's)
by zlinw＠mcmedia.com.au 15 May '13

15 May '13

A couple of points in my defense.......... The main problem with CD/DVD vendors of Linux distributions is the reliablity of the burning. Becuase of my relative isolation I have been using such CD/DVD sets for years and around half of the supplied sets __will__ have writing faults, particularly anyone using those awfull no-name media. ie most. If you install directly from the sets this may not be an issue as the faulty files may not be being used but as i recover all files and build my own repository this is an issue I regularly come across. This is why I have asked for ISO images as this problem does not apply. Second point, While it would be nice to come down to a LUV meeting this takes a good portion of a whole day and the trip down and back wil cost around 100 dollars, for such money a could bye line time to down load the 3 DVD's. Another point here like a good number of people living in rural areas I do not like driving in Melbourne and I certainly am __NOT__ comfortable about finding parking around North Melbourne in the afternoon peak hour and driving home at 0200 in the morning is no picknick these days. Its all got to hard, I will think of another way around the problem. Thankyou to the two people that responded with offers, it was apreciated. Linux for 20 years, Lindsay

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A wierd (to me at any rate) linker problem
by Allan Duncan 14 May '13

14 May '13

I'm trying to compile gnuplot 4.6.1, but it breaks on a library item being linked - file not found. Except it is clearly there. Details: [src]> c++ -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m32 -march=i686 -mtune=atom -fasynchronous-unwind-tables -L/usr/lib -o gnuplot alloc.o axis.o binary.o breaders.o color.o command.o contour.o datafile.o dynarray.o eval.o fit.o gadgets.o getcolor.o graph3d.o graphics.o help.o hidden3d.o history.o internal.o interpol.o matrix.o misc.o mouse.o parse.o plot.o plot2d.o plot3d.o pm3d.o readline.o save.o scanner.o set.o show.o specfun.o standard.o stats.o stdfn.o tables.o tabulate.o term.o time.o unset.o util.o util3d.o variable.o version.o -lcurses -ledit -lz -lgd -lXpm -lX11 -ljpeg -lfontconfig -lfreetype -lpng12 -lz -lm -ljpeg -llua -lm -ldl -lm /usr/bin/ld: cannot find -lpng12 collect2: ld returned 1 exit status [src]> [src]> ls -l /usr/lib/libpng12.so.0 lrwxrwxrwx 1 root root 18 May 13 21:09 /usr/lib/libpng12.so.0 -> libpng12.so.0.49.0 [src]> OK, there's libpng15 there also, change the 2 to a 5 in the above, and LO! the link works. Maybe libpng12 didn't get picked up by ldconfig: [/etc]> strings ld.so.cache | grep libpng libpng15.so.15 /usr/lib/libpng15.so.15 libpng15.so /usr/lib/libpng15.so libpng12.so.0 /usr/lib/libpng12.so.0 libpng.so.3 /usr/lib/libpng.so.3 [/etc]> Well that looks good to me. Where to next?

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auto setting values in /sys
by James Harper 14 May '13

14 May '13

What is the recommended way of setting values in /sys these days? Specifically, scheduler and read_ahead_kb for specific disks. I can write a few udev rules if required but it seems a bit clumsy... Thanks James

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