Linux router help needed Post: 302996177

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Top Forums UNIX for Beginners Questions & Answers Linux router help needed Post 302996177 by ygemici on Friday 21st of April 2017 02:45:18 AM

04-21-2017

Registered User

Hi , apoklyps3

Your linux is embedded ( for that Your "rootfs" ( "/") is in like RAM drive/disk ( as temp/pivot root ) -> then you cannot remount for r/w and this only r/w only at runtime ). )

( Your firmware in the flash ( mostly ) loaded to the RAM at the boot stages by bootloader ( like u-boot ).. )

Your "/dev/root" device is mounted to (/) point that is "read-only fs" with squashfs ( compressed ) that located in the flash ( or sometimes sdcard ? )
it should contains all binaries , startup files , default config files and the others....

* Your mount command is wrong as already @Corona688 said this.
* And you cannot re-mount the squahfs for r/w ( try with "/dev/root" lets see what happen or not )

Your device ( /dev/mtdblock5 is read/writable block device ( Flash or disk-on-chip ) with "rootfstype=jffs2" and
then you can read the some configs or other related files from it.
But also you can write via "/dev/mtd5" ( safe way ) char device to flash partiton which is writable side.
Shortly , mount command works via block device and must used via the char device for i/o operations..
Your ( /apps ) mount point is writable and has contains user apps/data/configs ( already i said above ) and these are permanent.
Look at the some details..
Managing flash storage with Linux

( the others are Kernel partitions from RAM or other memory chips ( ssd ? ) .. )

* You can look for the details of the flash partitions ( "cat /proc/mtd" )

Now i m not sure is there a easy way ? , ( because i have no knowlodge about the routers and firmware )
But i can say , you have to create the customized firmware and you must flash it to router for permanent solution.. ( if it has not nvram settings for non-squash filesystem support )
( or you must unsquashfs to extract the contents to writable partition then mksquashfs to create new image from thises and write it to the target mtd device ( like "writemtd.c" codes or image dump tools )

Another try , you maybe update the router firmware with ( open-source ) alternatives like dd-wrt , open-wrt .. ( if your product ( Kaon media ) vendor does not the new firmware..)

But best way as @Corona688 said , you must update the new firmware from original Kaon hardware vendor if there is..

Good lucks
regards
ygemici

Last edited by ygemici; 04-21-2017 at 03:58 AM..

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gluster

Gluster(8)							   Gluster Inc. 							Gluster(8)

NAME

       gluster - Gluster Console Manager (command line utility)

SYNOPSIS

       gluster

       To run the program and display gluster prompt:

       gluster

       (or)

       To specify a command directly:

       gluster [commands] [options]

DESCRIPTION

       The  Gluster Console Manager is a command line utility for elastic volume management. You can run the gluster command on any export server.
       The command enables administrators to perform cloud operations, such as creating, expanding, shrinking, rebalancing, and migrating  volumes
       without needing to schedule server downtime.

COMMANDS

   Volume Commands
	volume info [all|<VOLNAME>]
	      Display information about all volumes, or the specified volume.

	volume create <NEW-VOLNAME> [device vg] [stripe <COUNT>] [replica <COUNT>] [transport <tcp|rdma|tcp,rdma>] <NEW-BRICK> ...
	      Create  a  new  volume  of the specified type using the specified bricks and transport type (the default transport type is tcp).	To
	      create a volume with both transports (tcp and rdma), give 'transport tcp,rdma' as an option.  device vg parameter  specifies  volume
	      should  use block backend instead of regular posix backend. In this case NEW-BRICK should specify an existing Volume Group and there
	      can be only one brick for Block backend volumes.	Refer Block backend section for more details

	volume delete <VOLNAME>
	      Delete the specified volume.

	volume start <VOLNAME>
	      Start the specified volume.

	volume stop <VOLNAME> [force]
	      Stop the specified volume.

	volume rename <VOLNAME> <NEW-VOLNAME>
	      Rename the specified volume.

	volume set <VOLNAME> <OPTION> <PARAMETER> [<OPTION> <PARAMETER>] ...
	      Set the volume options.

	volume help
	      Display help for the volume command.

   Block backend
       By specifying "device vg" in volume create, a volume capable of exporting block devices(ie Volume  Groups  (VG))  is  created.  As  of  now
       exporting  only	VG  is supported. While creating block backend volume the "VG" (mentioned in NEW-BRICK) must exist (ie created with vgcre-
       ate). VG is exported as a directory and all LVs under that VG will be exported as files. Please refer BD commands section for Block backend
       related commands

   Brick Commands
	volume add-brick <VOLNAME> <NEW-BRICK> ...
	      Add the specified brick to the specified volume.

	volume remove-brick <VOLNAME> <BRICK> ...
	      Remove the specified brick from the specified volume.

	      Note:  If  you remove the brick, the data stored in that brick will not be available. You can migrate data from one brick to another
	      using replace-brick option.

	volume rebalance-brick <VOLNAME>(<BRICK> <NEW-BRICK>) start
	      Start rebalancing the specified volume.

	volume rebalance <VOLNAME> stop
	      Stop rebalancing the specified volume.

	volume rebalance <VOLNAME> status
	      Display the rebalance status of the specified volume.

	volume replace-brick <VOLNAME> (<BRICK> <NEW-BRICK>) start|pause|abort|status|commit
	      Replace the specified brick.

   Log Commands
	volume log filename <VOLNAME> [BRICK] <DIRECTORY>
	      Set the log directory for the corresponding volume/brick.

	volume log locate <VOLNAME> [BRICK]
	      Locate the log file for corresponding volume/brick.

	volume log rotate <VOLNAME> [BRICK]
	      Rotate the log file for corresponding volume/brick.

   Peer Commands
	peer probe <HOSTNAME>
	      Probe the specified peer.

	peer detach <HOSTNAME>
	      Detach the specified peer.

	peer status
	      Display the status of peers.

	peer help
	      Display help for the peer command.

   BD commands
	bd create <VOLNAME:/path-to-image> <size>
	      Creates a new image of given size in the volume. Size can be suffixed with MB, GB etc, if nothing specified MB is taken as default.

	bd delete <VOLNAME:/path-to-image>
	      Deletes a image in the volume

	bd clone <VOLNAME:/path-to-image> <new-image>
	      Clones an existing image (full clone)

	bd snapshot <VOLNAME:/path-to-image> <new-image> <size>
	      Creates a linked clone of an existing image with given size. Size can be suffixed with MB, GB etc, if nothing specified MB is  taken
	      as default.

   Other Commands
	help  Display the command options.

	quit  Exit the gluster command line interface.

FILES

       /var/lib/glusterd/*

SEE ALSO

       fusermount(1), mount.glusterfs(8), glusterfs(8), glusterd(8)

COPYRIGHT

       Copyright(c) 2006-2011  Gluster, Inc.  <http://www.gluster.com>

22 November 2012					   Gluster command line utility 						Gluster(8)