[SLUG] coding
In -- grep $VAR afile.txt | sed 's/ ? / newdata/' anotherfile.txt what do I insert where the question mark is in sed? $VAR and variations haven't worked. -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] coding
Depends on what you're trying to accomplish. However, there's not much point running through both grep and sed - sed's featureset is (roughly) a super-set of grep: andromeda:tmp polleyj$ cat afile.txt This is a line This is another This is the third line And this is a fourth. andromeda:tmp polleyj$ grep line afile.txt | sed 's/third/second/' This is a line This is the second line andromeda:tmp polleyj$ sed -e '/line/!d' -e 's/third/second/' afile.txt This is a line This is the second line andromeda:tmp polleyj$ The various arguments and parameters passed to sed are described under `man sed`. You probably also want to read `man bash`, particularly the section titled QUOTING. andromeda:tmp polleyj$ VAR=astring andromeda:tmp polleyj$ echo $VAR astring andromeda:tmp polleyj$ echo $VAR astring andromeda:tmp polleyj$ echo '$VAR' $VAR On Thu, Nov 18, 2010 at 10:38 AM, tony polkich basics_...@yahoo.com.au wrote: In -- grep $VAR afile.txt | sed 's/ ? / newdata/' anotherfile.txt what do I insert where the question mark is in sed? $VAR and variations haven't worked. -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] coding
On Thu, Nov 18, 2010 at 10:38 AM, tony polkich basics_...@yahoo.com.au wrote: In -- grep $VAR afile.txt | sed 's/ ? / newdata/' anotherfile.txt what do I insert where the question mark is in sed? $VAR and variations haven't worked. Try changing the single quotes to double quotes. So: grep $VAR afile.txt | sed s/$VAR/ newdata/ anotherfile.txt Or, more simply: sed s/$VAR/ newdata/ afile.txt anotherfile.txt Variables, like $VAR, are not expanded inside single quotes. -- Norman Gaywood, Computer Systems Officer University of New England, Armidale, NSW 2351, Australia ngayw...@une.edu.auPhone: +61 (0)2 6773 3337 http://mcs.une.edu.au/~normFax: +61 (0)2 6773 3312 Please avoid sending me Word or PowerPoint attachments. See http://www.gnu.org/philosophy/no-word-attachments.html -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
[SLUG] Converting a Hard Drive to a Virtual Machine
I have an Ubuntu box running which I would like to be able to clone into a virtualbox VM. I don't want to shut the hardware down, or play with it too much because it's a live server. Is it possible to use MondoRescue or some other software to clone the server hard drive, preferably without shutting it down, and then create a virtual machine from the resulting image? Thanks... David -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] Converting a Hard Drive to a Virtual Machine
david da...@kenpro.com.au writes: I have an Ubuntu box running which I would like to be able to clone into a virtualbox VM. I don't want to shut the hardware down, or play with it too much because it's a live server. Is it possible to use MondoRescue or some other software to clone the server hard drive, preferably without shutting it down, and then create a virtual machine from the resulting image? Not robustly, for cloning the raw disk, because you will end up with a really messed up file system. If you could stop file system access for a few hours it would work, but that has ... probably the same issue. :) What you *could* do is boot a LiveCD in the VM, and use rsync or something to clone the files into the new machine. Then, you can keep the block level consistent and only risk file level oddities, which are much less nasty. Daniel -- ✣ Daniel Pittman✉ dan...@rimspace.net☎ +61 401 155 707 ♽ made with 100 percent post-consumer electrons -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] Converting a Hard Drive to a Virtual Machine
On Fri, 2010-11-19 at 15:25 +1100, david wrote: Is it possible to use MondoRescue or some other software to clone the server hard drive, preferably without shutting it down, and then create a virtual machine from the resulting image? If you don't mind free-as-in-beer, we've used VMWare's vCenter Converter to migrate a big chunk of our Windows and Linux machines to guests - http://www.vmware.com/products/converter/ . Before that, my quick, dirty but effective way to do it was: - create the new virtual guest - boot it using your favourite liveCD, partition drives and create filesystems - use tar and netcat to transfer the running system across the network: - on guest, mount the new root filesystem and run `nc -l -p 1717 | tar -C /mountpoint xvf - - on old server, run something like `tar cf - --one-file-system / | nc address_of_guest 1717`. You'll need to tune the tar command to make sure you include all of the server's mounted filesystems. - edit the new /etc/fstab on the guest as appropriate - install a bootloader in the guest, usually by editing grub config files in /boot/grub and running grub-install. Note that I made no attempt to keep any services running on the old server during this process. So all but the bare minimum was shut down, and there weren't any critical files being written to. On a real running system, you're more than likely going to end up with some files in an inconsistent state doing this if the old server is trying to write to them. -- Pete -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
