Re: mount as read/write on demand
i have done this mount -o remount,ro and then run apt-get upgrade. it worked and writed everything to the card. then i unplugged the power to simulate a power failure and the system got corrupted. this is what i am looking to avoid. mount as read only by default, to protect from power failures. Στις 21/2/2014 23:44, ο/η Andrei POPESCU έγραψε: On Vi, 21 feb 14, 22:25:17, binary wrote: i am afraid that the mount -o remount,rw is not working. You'll have to give much more detail than this, like what was the result/error message/etc. Kind regards, Andrei -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/53086174.7060...@gmail.com
Re: mount as read/write on demand
I forgot to mention my /etc/fstab proc/proc procdefaults00 sysfs/syssysfs defaults00 /dev/sda1 / ext2noatime,errors=remount-ro 0 1 Στις 22/2/2014 10:36, ο/η binary έγραψε: i have done this mount -o remount,ro and then run apt-get upgrade. it worked and writed everything to the card. then i unplugged the power to simulate a power failure and the system got corrupted. this is what i am looking to avoid. mount as read only by default, to protect from power failures. Στις 21/2/2014 23:44, ο/η Andrei POPESCU έγραψε: On Vi, 21 feb 14, 22:25:17, binary wrote: i am afraid that the mount -o remount,rw is not working. You'll have to give much more detail than this, like what was the result/error message/etc. Kind regards, Andrei
Re: mount as read/write on demand
Hi. On Sat, 22 Feb 2014 10:57:48 +0200 binary dreamer.bin...@gmail.com wrote: I forgot to mention my /etc/fstab proc/proc procdefaults00 sysfs/syssysfs defaults00 /dev/sda1 / ext2noatime,errors=remount-ro 0 1 Surely you realize that 'errors=remount-ro' should only work in case you encounter any filesystem error? Στις 22/2/2014 10:36, ο/η binary έγραψε: i have done this mount -o remount,ro and then run apt-get upgrade. I assume you've meant 'mount -o remount,rw'. it worked and writed everything to the card. Did you invoked 'sync' afterwards? Did you remount filesystem back to read-only status? then i unplugged the power to simulate a power failure and the system got corrupted. Did you run fsck.ext2 on the boot following the simulated power failure? Reco -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20140222173603.2d598e889b0efeaaaf93c...@gmail.com
Re: mount as read/write on demand
sorry, i am lost. what is the solution to my problem? Στις 22/2/2014 15:36, ο/η Reco έγραψε: Hi. On Sat, 22 Feb 2014 10:57:48 +0200 binary dreamer.bin...@gmail.com wrote: I forgot to mention my /etc/fstab proc/proc procdefaults00 sysfs/syssysfs defaults00 /dev/sda1 / ext2noatime,errors=remount-ro 0 1 Surely you realize that 'errors=remount-ro' should only work in case you encounter any filesystem error? Στις 22/2/2014 10:36, ο/η binary έγραψε: i have done this mount -o remount,ro and then run apt-get upgrade. I assume you've meant 'mount -o remount,rw'. it worked and writed everything to the card. Did you invoked 'sync' afterwards? Did you remount filesystem back to read-only status? then i unplugged the power to simulate a power failure and the system got corrupted. Did you run fsck.ext2 on the boot following the simulated power failure? Reco -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/5308b555.60...@gmail.com
Re: mount as read/write on demand
Hi. On Sat, 22 Feb 2014 16:33:57 +0200 binary dreamer.bin...@gmail.com wrote: Please refrain from top-posting on this list. sorry, i am lost. Hmm. I believe I've just asked a couple of simple questions. Sorry those led to your confusion. what is the solution to my problem? There's no simple solution to your problem. The filesystem layout you're using will prevent you from using read-only root filesystem. The reason is - you cannot remount a filesystem read-only if: - You have processes which write in this filesystem. - You've changed some binaries and libraries, and have processes which were launched from those binaries and libraries before the overwrite. The former is nearly always happens with syslog (which writes to the files in /var/log). You're have /var directory in the root filesystem (which you want to make read-only). The latter will happen on any upgrade. Still, while read-only root is can be done in Debian: https://wiki.debian.org/ReadonlyRoot read-only /var is impossible unless you're using some kind of livecd/liveusb. Reco -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20140222194558.cf9b788611ebe3c5eecaa...@gmail.com
Re: mount as read/write on demand
i am afraid that the mount -o remount,rw is not working. is there a howto for this? i am running squeeze 6.0.9 Στις 19/2/2014 17:50, ο/η Efraim Flashner έγραψε: On Tue, 18 Feb 2014 15:47:19 +0100 Erwan David er...@rail.eu.org wrote: Le 18/02/2014 15:42, binary dreamer a écrit : Hello everyone. I am running some services in a remote headless system. the system runs debian 6. I would like the system to be read only by default. in case of an update/upgrade I could run in read/write to process the job. the filesystem is ext2 and it runs in a cf card. I have seen voyage Linux that has this functionality but it misses kernel headers. It is a real pain to compile the headers in this underpowered box. I would like to ask if someone could help me create a system read/write on demand. Thanks in advance. mount -o remount,rw mount point should do the trick (and mount -o remount,ro after use) and change the listing in /etc/fstab from rw to ro -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/5307b62d.7010...@gmail.com
Re: mount as read/write on demand
On Vi, 21 feb 14, 22:25:17, binary wrote: i am afraid that the mount -o remount,rw is not working. You'll have to give much more detail than this, like what was the result/error message/etc. Kind regards, Andrei -- http://wiki.debian.org/FAQsFromDebianUser Offtopic discussions among Debian users and developers: http://lists.alioth.debian.org/mailman/listinfo/d-community-offtopic http://nuvreauspam.ro/gpg-transition.txt signature.asc Description: Digital signature
Re: mount as read/write on demand
On Tue, 18 Feb 2014 15:47:19 +0100 Erwan David er...@rail.eu.org wrote: Le 18/02/2014 15:42, binary dreamer a écrit : Hello everyone. I am running some services in a remote headless system. the system runs debian 6. I would like the system to be read only by default. in case of an update/upgrade I could run in read/write to process the job. the filesystem is ext2 and it runs in a cf card. I have seen voyage Linux that has this functionality but it misses kernel headers. It is a real pain to compile the headers in this underpowered box. I would like to ask if someone could help me create a system read/write on demand. Thanks in advance. mount -o remount,rw mount point should do the trick (and mount -o remount,ro after use) and change the listing in /etc/fstab from rw to ro signature.asc Description: PGP signature
Re: mount as read/write on demand
Le 18/02/2014 15:42, binary dreamer a écrit : Hello everyone. I am running some services in a remote headless system. the system runs debian 6. I would like the system to be read only by default. in case of an update/upgrade I could run in read/write to process the job. the filesystem is ext2 and it runs in a cf card. I have seen voyage Linux that has this functionality but it misses kernel headers. It is a real pain to compile the headers in this underpowered box. I would like to ask if someone could help me create a system read/write on demand. Thanks in advance. mount -o remount,rw mount point should do the trick (and mount -o remount,ro after use) -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/53037277.6010...@rail.eu.org
