Re: Help with Linux command
Alvin Oga wrote: if i understood correctly, the original question was dealing with partitions ... This is true. But if he's already installed (which he has) those partitions are populated. Now, I'm not saying that the original poster is a complete neophyte as to think the data would move with the fstab entry but this list is archived and people do search it so an incomplete answer of switching the partitions without also mentioning that the user needs to move the data around as well might be a gotcha for someone else in the future. Best to be clear that the data needs to be moved by the user as well as the fstab entries being switched. :) -- Steve C. Lamb | I'm your priest, I'm your shrink, I'm your PGP Key: 8B6E99C5 | main connection to the switchboard of souls. ---+- signature.asc Description: OpenPGP digital signature
Re: Help with Linux command
On Sat, 1 Jan 2005, Steve Lamb wrote: Alvin Oga wrote: if i understood correctly, the original question was dealing with partitions ... This is true. But if he's already installed (which he has) those partitions are populated. Now, I'm not saying that the original poster is a complete neophyte as to think the data would move with the fstab entry but this list is archived and people do search it so an incomplete answer of switching the partitions without also mentioning that the user needs to move the data around as well might be a gotcha for someone else in the future. Best to be clear that the data needs to be moved by the user as well as the fstab entries being switched. :) given /home has the correct home data and is say 2GB on say /dev/hdaxxx given /usr has the correct usr data and is say 10GB on say /dev/hdayyy if as in the original reply, to simply swap the /home and /usr partition - there is two possible answers... a) change the mount points only ... ( for simple swap partitions ( as mount points ) where the data ( is in the correctly sized partitions == == it's a common problem for installing a new distro == into the wrong partition because one forgot which == one was assigned what size ?? == ( double checking would have prevented it ) == with current: /etc/fstab --- /dev/hdaxxx /home ( has /home/X11R6, /home/bin, /home/sbin ) /dev/hdayyy /usr ( has /usr/tom /usr/dick /usr/harry ) New fstab with Swapped partitions ( mount points ) - /dev/hdaxxx /usr (is now /usr/X11R6 /usr/bin /usr/sbin ) /dev/hdayyy /home (is now /home/tom /home/dick /home/harry ) == == no copying of data is needed == all of the same home data that was on /dev/hdayyy is now still as it was on /dev/hdayyy but is now called and accessed correctly as /home/tom instead of /usr/tom like it was before - the other is like you guys are doing, leaving the mount points the same and moving the data from one partition to another is a lot more work ( that may or may not be needed, depending on the desired partition size for each /usr and /home ) - moving data is messy but is trivial 2 command lines if one has the space for holding both at the same time - trick question is ... how much space is needed in /home vs /usr and is it worth fixing by moving data from one partition into the other - simple swapping of mount point is trivial, if the data is in the correct sized partitions = = swapping mount points is a complete solution = as was previously posted = c ya alvin -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: Help with Linux command
Alvin Oga wrote: given /home has the correct home data and is say 2GB on say /dev/hdaxxx given /usr has the correct usr data and is say 10GB on say /dev/hdayyy if as in the original reply, to simply swap the /home and /usr partition You're making a false asumption. From the original message: If I want to swap the mount point and all it's content between /usr and /home. Swap the mount point *and all it's content*. The disk space I originally intended for /usr and /home needs to be swapped. Dsk space already needs to be swapped. - there is two possible answers... a) change the mount points only ... Changing mount points doesn't help. As said in the original message the content needs to be moved as well. - the other is like you guys are doing, leaving the mount points the same and moving the data from one partition to another is a lot more work ( that may or may not be needed, depending on the desired partition size for each /usr and /home ) No, we're not. We're saying to swap the mount points *and* move the data as per his initial request. - moving data is messy but is trivial 2 command lines if one has the space for holding both at the same time We know he has enough space. He said one parition is 2Gb. That means the data there (home) is under 2Gb presently and the data in the other partition is able to fit into it; also 2Gb. Since the 2nd partition is 10Gb he can easily fit 4Gb into that to make the swap. ;) - trick question is ... how much space is needed in /home vs /usr and is it worth fixing by moving data from one partition into the other 4Gb. - simple swapping of mount point is trivial, if the data is in the correct sized partitions It isn't. = swapping mount points is a complete solution = as was previously posted Except it leaves him with his usr on home and home on usr. Even worse, as I pointed out, since usr houses a lot of essential programs one could have a really tough time recovering from that situation. -- Steve C. Lamb | I'm your priest, I'm your shrink, I'm your PGP Key: 8B6E99C5 | main connection to the switchboard of souls. ---+- signature.asc Description: OpenPGP digital signature
Re: Help with Linux command
hi ya steve On Sat, 1 Jan 2005, Steve Lamb wrote: Alvin Oga wrote: given /home has the correct home data and is say 2GB on say /dev/hdaxxx given /usr has the correct usr data and is say 10GB on say /dev/hdayyy if as in the original reply, to simply swap the /home and /usr partition You're making a false asumption. From the original message: yes and no .. depends on th point of view and just for clarification ... If I want to swap the mount point and all it's content between /usr and /home. both mount points and data is moved ... mount /dev/hdaxxx on /home mount /dev/hdaxxx on /usr but if one wants to take data on /dev/hdaxxx ( say 2GB ) and put that on /dev/hdayyy ( say 10GB), than changing mount points will not help but, mounting /dev/ on /home or /foo-bar will move the data with it except in one case its called(accessed differently) /home/tom or /foo-bar/tom - data is moved for free c ya alvin -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: Help with Linux command
Alvin Oga wrote: yes and no .. depends on th point of view and just for clarification ... No, no point of view. If I want to swap the mount point and all it's content between /usr and /home. both mount points and data is moved ... No data is moved. You're presuming that he has them backwards and the data is on the correct physical volumes. but if one wants to take data on /dev/hdaxxx ( say 2GB ) and put that on /dev/hdayyy ( say 10GB), than changing mount points will not help Exactly! That's what he said in the original message. He realized he had mounted them incorrectly. /usr was the 10Gb and /home was the 2Gb. He wanted /home to be the 10Gb and /use the 2Gb. Since they are *populated with data* he requested information not only on how to remount those partitions but how to *move the contents* as well. but, mounting /dev/ on /home or /foo-bar will move the data with it except in one case its called(accessed differently) /home/tom or /foo-bar/tom - data is moved for free Yes, we all get that. It does not solve the problem that his /usr data is on a 10Gb partition, his /home data is on a 2Gb partition and the data needs to be swapped *and* remounted. -- Steve C. Lamb | I'm your priest, I'm your shrink, I'm your PGP Key: 8B6E99C5 | main connection to the switchboard of souls. ---+- signature.asc Description: OpenPGP digital signature
Re: Help with Linux command
On Fri, 31 Dec 2004, Syed Huq wrote: I realized that I made a mistake in the partition size between the two and I would like to swapthem. The disk space I originally intended for /usr and /home needs to be swapped. just edit /etc/fstab and swap it in there ( 2nd column ) (as root) umount /home umount /usr mount -av and you should be back in biz or do it the super hard way and reboot, power off even c ya alvin -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: Help with Linux command
Op vr, 31-12-2004 te 17:47 -0800, schreef Alvin Oga: On Fri, 31 Dec 2004, Syed Huq wrote: I realized that I made a mistake in the partition size between the two and I would like to swapthem. The disk space I originally intended for /usr and /home needs to be swapped. just edit /etc/fstab and swap it in there ( 2nd column ) (as root) umount /home umount /usr mount -av and you should be back in biz Right, but do not forget to move the data. or do it the super hard way and reboot, power off even c ya alvin -- Met vriendelijke groet, Olav. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: Help with Linux command
Olav wrote: Right, but do not forget to move the data. Might also want to use a shell like sash. Moving /usr is dicey since it is where lots of programs live. ;) Best to have the essentials compiled in in case something goes wonky. -- Steve C. Lamb | I'm your priest, I'm your shrink, I'm your PGP Key: 8B6E99C5 | main connection to the switchboard of souls. ---+- signature.asc Description: OpenPGP digital signature
Re: Help with Linux command
On Fri, 31 Dec 2004, Steve Lamb wrote: Olav wrote: Right, but do not forget to move the data. Might also want to use a shell like sash. Moving /usr is dicey since it is where lots of programs live. ;) Best to have the essentials compiled in in case something goes wonky. if i understood correctly, the original question was dealing with partitions ... mount /dev/hdaxxx /home mount /dev/hdayyy /usr .. vs .. mount /dev/hdaxxx /usr mount /dev/hdayyy /home = to do the above, just change /etc/fstab = now /home and /usr is swapped --= no copying of data is needed == if one wants to move /home/data-stuff to the otehr partition, you need to make sure you have enough space for both /usr and /home at the same time ... - if not ... put all that data someplace else ( some place reliable ) ( /usr and /home can be huge amts of data ) c ya alvin -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: Help with Linux command
Syed Huq wrote: Hi, If I want to swap the mount point and all it's content between /usr and /home. What should I do ? I realized that I made a mistake in the partition size between the two and I would like to swapthem. The disk space I originally intended for /usr and /home needs to be swapped. Thanks, Rathon -- It's easiest if you have a third partition large enough to hold the smaller of your two /usr and /home partitions, although you can do it if you have enough free space for one of your partitions on the other, but it's messy. It's very easy to mess up no matter how you do it. You'll want to boot into single-user mode (or better, boot off a LiveCD, such as Knoppix), copy/move the data, preserving permissions, unmount and remount with the new mount points, and edit /etc/fstab to reflect the new mount points. I would boot off Knoppix, mount the /usr and /home partitions, along with a third empty partition, say /spare; then cp -a /home /spare, double-check that did what I wanted, then rm -rf /home; cp -a /usr /home, again double-checking that it did what I wanted (you don't want /home/usr; you want /home[the files/dirs in /usr]); then rm -rf /usr; and finally cp -a /spare /usr and rm -r /spare. Then fix the mount point settings in /etc/fstab, and reboot. -- Kent -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
