World: r3wp

Reposted from other conversations... read-only root filesystem article: 
http://www.guciek.net/en/articles/read_only_root_filesystem

Process freezer that does not require root privileges, CryoPID... 
useful!  http://cryopid.berlios.de/

I just tried out "tiny linux core" (11 megs). Boots in seconds, installs 
in a minute (frugal), and runs rebol view out of the box....
Includes simple desktop...pretty cool

Great for kiosk/appliance devices running rebol apps

I thought one or more of you gurus would have some advice. I'm trying 
to back up a website via ftp to move all the files to another server. 
Some of the files have owner "apache" and won't let me move them. 
There are a lot of those files in various directories. Not being 
a linux guy, is there an easy way to chown a whole directory with 
subdirectories of files?

chown -R src dest 


and if you can use scp or rcp (depending on your setup) to copy your 
files over, it should be less hassle than ftp which often has many 
issues with stranger filenames and permissions.


on one server, for example, a file was created with ftp, which is 
a legal (albeit twisted) path, but it cannot be access or deleted 
from that same ftp access, because the path gets mangled when it 
goes through the url path parser of that ftp server.


also unless both source and destination ftp servers are the same, 
you can have other nasties.


its always best (and much faster) to gzip your whole directory and 
copy over one file, and then unpack it on the other server (you also 
get a free backup ;-)

ahh... ignore the dest argument... I got mixed up with rcp in my 
head  ;-)

also note that you should not use * when specifying folders with 
-R cause it *might* ignore "." folders and files.  (ex: .profile, 
.login, .svn, etc)

Thanks Maxim. I use Putty to access the server though I use it so 
infrequently that each time is like a new experience. I appreciate 
your help.

putty comes with an scp file xfer utility. I'd recommend using that 
instead of ftp... its really easy to use... just look in the docs 
everything is there.


this also has the advantage that you're not sending your password 
in clear text over the web (which ftp gladly does for you :-)

Thanks again. You make it sound like it's easy :-)

BTW, if I log in as root do you think I have to even worry about 
chowning?

some newer Linuxes have an improved security model which I don't 
reallly know anything about, but for simple file access within data 
directories, you will have no problems with root.

(as long as you're just doing things locally)

but remember that if you xfer files to another unix and the user/group 
ids don't exist, you will have to do a chown on the other system 
(unless everything runs as root then, hey who cares right ?  ;-)

I see, I hope the application doesn't care. Thanks. I'm checking 
it out right now.

obviously if possible *never* run services as root !

Oh, I mean if later the php app cares whether or not a file is owned 
by a different user.

yes, obviously, a chmod is also very important


chown -R   for data should work without problems and its a good thing 
to do.

Before mucking with a recursive chown, I would recursively list your 
files and save into a file, eg:
$ ls -lR > listedfiles
(that first option is a lowercase L ).

Then later if you are worried about having blasted some particular 
permissions, you just refer to listedfiles.

Thanks Anton. That's a wise move as well.

sorry if it sounds arch but altme for linux  is unreadable .... fonts 
are awfull

That's why some people run Wine on Linux

I though people just whine on linux    ;-)

You can try this on Debian:  apt-get install msttcorefonts

For all Linux gurus:
- I have a xen disk image file
- I want to mount it to read-back some files from it

How to do this? I have tried some stuff but...

- It seems that the images might have some problems

Is there a way to rescue a disk image?

Standard command for mounting an image is really all I know - the 
type of disk image might be detected automatically:
mount -o loop Image Point/

It really looks, that I have lost the data in the image... :-( I 
can't mount nor re-create a partition table.

Is the image containing a single partition or a partitioned virtual 
disk?

If it is a single partition, loop-mounting it as Izkata already mentioned 
should suffice.

If it is a full disk, you'll need to mount the proper partition within 
the disk. There are various approaches possible, depending on your 
actual scenario. You could loop-mount with an offset, if you now 
your disk layout fairly well. Alternatively, use losetup to set up 
a loop device bound to the disk image. Then use kpartx to have the 
kernel read the partition table from this new device and map the 
partitions to their own devices. Finally mount the device corresponding 
to the partition you want to access.

Depends a bit on the details. Feel free to contact me privately.

It's just one partition. The problem is that I can't mount it, as 
the file-structure is damaged. I tried to extract meaningful file 
parts but no luck. I already spent to much time on it. We throw it 
away as we have the data locally and now need to find a way how to 
restore our AltMe content.

Just curious, what is the status of the rebol 3 vid for linux?  I 
would think the wiki would show the status, but I couldn't find it.

There is no "rebol 3 vid for linux", Rebol 3 VID is not OS-specific

Well, I more meant the gui system for linux is not implemented so 
you can't use vid yet.

I think he wants a publicly available Linux build of R3 with the 
GUI parts included :)

yeah  :).  I'm tired of testing things using wine and the windows 
build.

As far as I know, the "View" parts of the hostkit have not yet been 
ported to Linux.

(The R3 Host Kit, that is.)

IIRC there exists a command different from FIND that will print all 
absolut file locations for a given filename. Any idea?

readlink(1), maybe?

locate(1), maybe?

LOCATE was it... Thanks.

Just installed Zorin 4 (ubuntu based) and i'm having trouble getting 
R3 running. I assume I run it from the terminal  but I get "commnad 
not found" error. Anyone know what I'm not doing?

probabily you need to add ./ in front of the command name

thanks henrik!

Anyone using Dovecot IMAP mailserver here? I need to know if I can 
delete files on the filesystem from the mailbox dirs without bombing 
the mailserver. I have a couple of duplicate files I need to get 
rid of.

Ok, Thunderbird and a plug-in is your friend.

I've setup dovecot twice ... but am not using it now.

gcc 3.4 first appeared in debian sarge (debian 3.1), afaict. if he's 
using anything older (woody, potato), he'll be out of luck.