IRC chat logs for #ltsp on irc.freenode.net (webchat)


Channel log from 18 May 2010   (all times are UTC)

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01:28
<glink>
hello all
01:28
I am trying to configure an ltsp server
01:28
but i am having trouble looking for answers. I have searched for detailed howtos but have not been successful
01:29
my setup involves external dhcp and tftp server
01:30
i am enable to boot the ltsp client via pxe but it can not find an ndb server
01:30
in my pxelinux.cfg/default file i only have a settings for an nbd port
01:31
how can i specify which nbd server the client can use?
01:32
this is the append line in my default file ---> append ro initrd=ltsp/amd64/initrd.img quiet splash nbdport=2000
01:33
how do i specify the ip of the nbd server?
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01:58
<dobber>
sometimes when a client logs off it leaves open processess
01:58
for example, i have a 100% cpu usage on a skype process, and the users clients is turned off
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02:38
<alkisg>
dobber: if the clients do not logoff properly, some processes are left behind. There are some tools like gnome-watchdog to automatically kill all such processes.
02:41
<dobber>
alkisg yeah, i found out that the client does not logoff properly
02:41
searching why
02:41
...
02:42
i haven't used linux desktop in 6 years... it's all new to me now :)
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02:43
<alkisg>
glink: nbdroot=ip:port, but that should be done automatically for you. do you have another dhcp server running?
02:45
<glink>
alksig: thanks i just found the out and tried it
02:45
but it does not work
02:45
my platform is lucid
02:45
<alkisg>
Do you get a busybox shell on the client?
02:45
<glink>
but the dhcp server and tftp server are external to the ltsp server
02:45
yes i get the busy box shell
02:46
i just installed by apt-get install ltsp-server
02:46
then ran ltsp-build-client
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02:46
<nerux>
Hi
02:47
I've problem with new ubuntu release for run my thinclients
02:47
<alkisg>
glink: in that shell, try: nbd-client server-ip 2000 /dev/nbd0
02:47
<glink>
btw, how can i test if my nbd server is configured properly?
02:47
alkisg great i will try that
02:48
<nerux>
I've a LDAP server and a 10.04 LTSP server
02:49
my thinclients logged in correctly with a local account but I can open any menu (application, ...) with an LDAP account
02:49
<glink>
alkisg: i think it was able to connect
02:49
it did not return an error
02:50
<nerux>
an id command successfully respond can you help me ?
02:51
<glink>
alkisg: it said negotiation size=4kb bs=1024 sz=4kb
02:52
alkisg: does that mean it was able to connect and download?
02:52
<alkisg>
yes but the size is wrong
02:52
grep nbd /etc/inetd.conf
02:53
<glink>
alkisg: i have a running nbd-server at port 2000
02:53
<alkisg>
ok, but do give the above command to see the file path
02:53
<glink>
i did not configure it via inetd.conf but i see an nbdroot entry there
02:53
am i running 2 nbd servers?
02:54
<alkisg>
you configured nbd-server manually? what exactly did you do?
02:54
(and, why?)
02:54
<glink>
yes i installed it. why? because i really did not know what i was doind ;)
02:55
doing
02:55
<nerux>
you can use /etc/nb/config file to configure one or more file
02:55
<alkisg>
glink: well, undo what you did so that it works as usual from inetd
02:55
<nerux>
/etc/nbd-server/config
02:55
<glink>
alksig: i will try it now. thanks
02:56
<nerux>
and disable and remove nbd entry in the inetd.conf file (update-inet.d command)
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03:14
<glink>
alkisg: nbd-client was able to download a bigger file
03:15
nerux: thanks for the tips also
03:15
<nerux>
ok
03:15
<glink>
alksig: whats the next step from intramfs shell?
03:16
<alkisg>
glink: ctrl+d to exit
03:17
(so that it continues booting)
03:22
<glink>
alksig: i see
03:25
alksig: nbd-client downloaded a file with size 569920KB
03:25
after i issued ctrl d, i got a mount /rofs /root/rofs failed invalid argument
03:34
<alkisg>
What do you get if you boot the client normally? Do you still get nbd errors?
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03:39
<glink>
alksig: i was able to get to the login prompt already. this after i changed pxelinux.cfg/default to nbdroot=ip:port. previously it was nbdroot=ip nbdport=port
03:39
alksig: thanks much ;)
03:39
<alkisg>
No that shouldn't matter
03:39
If fact you shouldn't have to specify any nbd* parameters
03:39
Anyway if it works, fine
03:40
<glink>
alksig: yeah. but it works now. thanks
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07:50
<nerux>
hi, Ive a problem with lucid LTSP server run with LDAP server
07:51
Anybody, can help-me ?
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08:07
<reynolds>
Can anyone help me figure out why when I create a new user, I cannot access their login from my clients? I can log in with users that I have previously created.
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08:11
<reynolds>
netflix
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09:30
<reynolds>
anyone having problems logging in to clients? I am getting this message "gib warning ....getpwuid_r failed...
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09:50
<sbalneav>
Morning all
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09:59
<Gadi>
!s
09:59
<ltspbot`>
Gadi: "s" :: Scotty!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
10:00
<sbalneav>
Gadi: Did some more work on the project, haven't forgotton :)
10:00
I'm struggling with Ubuntu server right now.
10:01
<Gadi>
struggle? Ubuntu? never!
10:01
<sbalneav>
yeah
10:01
software raid completely doesn't work on an install
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12:00
<dcepticon>
hi ive a problem with nbd server
12:01
failed to connect to nbd server and if I go nbd-client ltsp-server-addy 2000 /dev/nbd0 it says
12:02
unknown partition table
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12:03
<dcepticon>
noone in?
12:04
<alkisg>
dcepticon: unknown partition table is ok
12:04
What size does it say?
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12:11
<dcepticon>
one sec
12:11
sry
12:11
540696
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12:12
<dcepticon>
alkisg?
12:12
<alkisg>
It seems ok.
12:12
Is your client very fast?
12:13
(e.g. core 2 duo etc?)
12:13
<dcepticon>
the box only has 384 MB of ram
12:13
<alkisg>
384 is more than enough for a thin client
12:13
While at busybox, try this: cat /etc/net-eth0.conf
12:14
<dcepticon>
of one sec...
12:14
<alkisg>
see the ROOTSERVER line there
12:14
Is this your ltsp server? Or e.g. a router?
12:14
dcepticon: sorry, /tmp/net-eth0.conf
12:15
<dcepticon>
oops it's the ip of my gateway not the ltsp box
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12:16
<alkisg>
One way to work around it is to specify it with nbdroot=ip:2000
12:17
But you're not supposed to have 2 dhcp servers on the same subnet...
12:17
<dcepticon>
in /etnbd-server/config?
12:17
<alkisg>
No, in pxelinux.cfg/default
12:17
<dcepticon>
in /etc/nbd-server/config?
12:17
ahh ok will try
12:17
<alkisg>
But you'd better solve it correctly, i.e. use only 1 dhcp server
12:17
(either the ltsp one or the other one)
12:18
<dcepticon>
i already did that thx :)
12:19
now it read default ltsp
12:19
label ltsp
12:19
kernel vmlinuz
12:19
append ro initrd=initrd.img nbdport=9572
12:19
nbdroot=192.168.0.151:2000
12:20
i also noticed the gateway is wrong
12:20
0.0.0.0
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12:21
<alkisg>
That's your router setup sending the wrong gateway
12:22
Turn that dhcp server off... or use a different subnet... or a proxydhcp server...
12:22
Don't leave it with 2 dhcp servers, it causes more problems than it solves
12:23
<dcepticon>
i only have one dhcp server running
12:23
it's on the ltsp server not the router
12:24
<alkisg>
can you paste your /etc/ltsp/dhcpd.conf ?
12:24
!pastebot
12:24
<ltspbot`>
alkisg: "pastebot" :: The LTSP pastebot is at http://ltsp.pastebin.com. Please paste all text longer than a line or two to the pastebot, as it helps to reduce traffic in the channel. Don't forget to paste the URL of the text here.
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12:27
<dcepticon>
http://ltsp.pastebin.com/y8tnKsQL
12:28
<alkisg>
"  - Unknown paste ID, it may have expired or been deleted!"
12:29
<dcepticon>
http://ltsp.pastebin.com/mmyW6tpa
12:29
<alkisg>
The same.
12:29
Try paste.ubuntu.com
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12:33
<dcepticon>
http://paste.ubuntu.com/435656/
12:35
brb alkisg, smoke break :)
12:36
<alkisg>
OK. Do you have 1 or 2 NICs on your server?
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12:42
<dcepticon>
just one
12:44
<johnny>
i wonder how much benefit i'd really see if i enabled my second nic which is gigabit
12:44
i have a switch with a gigabit uplink
12:44
not sure if it's going to be worth the hassle with fat clients
12:44
what do you think alkisg ?
12:44
<dcepticon>
ok I actually was running two dhcp server forgot to disble the ltp dhcp server
12:44
<johnny>
perhaps the image download would be faster.. but it's not that bad right now.. the machine s stay on all day
12:45
<alkisg>
johnny: you got 2 gigabit nics?
12:45
<johnny>
no
12:45
<alkisg>
one 100mbps and one 1gigabit?
12:45
<dcepticon>
alkisg, so i just concatenated the two
12:45
<johnny>
yes
12:45
<alkisg>
johnny: and you're using the 100mbps now?
12:45
<johnny>
yep
12:45
it's the onboard one
12:45
<alkisg>
Well, you'd have 10x times the speed...
12:46
<johnny>
the reason we didn't use it by default, is that we have an wrt54gl in between.. so i have to rewire stuff
12:46
so that switch goes directly to the machine
12:46
10x the speed for what?
12:46
<alkisg>
For network speed, i.e. disk access for the terminals
12:46
<johnny>
how will it be noticable for fat clients?
12:46
<alkisg>
Sure
12:47
<johnny>
if it's all fat clients
12:47
<alkisg>
Disk access will be 10 times faster
12:47
That's surely noticable...
12:47
<johnny>
i'll try.. i think we ran into a problem trying to bridge the network
12:47
<alkisg>
What's your network setup?
12:47
1 switch?
12:48
<johnny>
3 clients -> 8 port 100mbs / gbs uplink -> wrt54gl (100mps)
12:49
and the dsl modem and ltsp server are connected to the hub
12:49
err wrt54gl
12:49
if only the wrt54gl was gb
12:49
<dcepticon>
alkisg, now i have a message spawning shell in initramfs
12:49
<johnny>
then i wouldn't have to rewire anything
12:50
<dcepticon>
ssh root@192.168.0.201
12:50
oops
12:50
<johnny>
maybe i should just buy a new machine
12:50
err a new router
12:50
<alkisg>
johnny: well the main thing is to put the gigabit server nic to the gigabit uplink
12:51
(and turn flow control off)
12:51
Does that gigabit nic allow turning flow control off?
12:51
<johnny>
sure.. that just involves rewiring behind the counter :)
12:51
lol
12:51
<alkisg>
https://help.ubuntu.com/community/UbuntuLTSP/FlowControl
12:51
If not, there's no point in doing it
12:51
<johnny>
i wouldn't have to use the other nic if at all
12:52
<alkisg>
dcepticon: what message?
12:52
<johnny>
if i replaced the wrt54gl with something with gb ports
12:52
or rather.. i wouldn't have to use the onboard nic at all
12:52
and wouldn't have to setup natting
12:52
<alkisg>
Why natting? One nic is enough...
12:52
<johnny>
not if i need the server machine connected to the 100mbs switch
12:52
the wrt54gl
12:53
there's about 30 ft between the 2 hubs
12:53
<dcepticon>
alkisg, now i have a message "spawning shell in initramfs" (the screen of output clears before it says that so I can't shift-page-up)
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12:53
<alkisg>
remove "quiet splash" from pxelinux.cfg/default
12:54
<johnny>
alkisg, another benefit .. would be moving dnsmasq from the server machine and putting it on the wrt54gl.. which i don't have the space/ram for atm
12:54
or rather.. the replacement for the wr54gl
12:54
<alkisg>
johnny: for 3 clients why do you need a dhcp server?
12:54
<dcepticon>
alkisg, I did already and i see loads of output instead of the pulsing ubuntu frambuffer
12:54
<alkisg>
Just use the embedded dhcp server of the wr54gl
12:54
<johnny>
alkisg, cuz i need a tftp server anyways?
12:54
so.. why not
12:55
plus it's also a caching dns server
12:55
so.. to me.. the real question is why not.. it's basically free
12:56
i had a problem with getting dnsmasq to act right on the lan network
12:56
probably related to the coova firmware i use
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12:56
<johnny>
which is a captive portal
12:56
too bad coova seems to be slowed down development wise
12:57
i'm not sure what's a good addon firmware to use nowadays
12:57
something that provides a captive portal
12:57
something i don't have to manually setup
12:57
coova just works
12:59
<alkisg>
dcepticon: right, on those loads of output there's an error somewhere, try to locate it (near the end)
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13:03
<dcepticon>
i'm used to looking for output errors it talks about the mouse and usb subsystem then the last line says "changing colour console to 80x25" and then starts busybox
13:04
<alkisg>
Hmmm try putting back "quiet" (but leave splash out) to have fewer messages
13:05
<dcepticon>
ok do you want to see my /var/lib/tftpboot/ltsp/i386/lts.conf
13:08
label ltsp
13:08
kernel vmlinuz
13:08
append ro initrd=initrd.img quiet nbdport=9572
13:08
nbdroot=192.168.0.151:2000
13:08
for pxelinux.cfg/default
13:09
i'm starting to question the ports on the nbdroot and nbdport lines
13:10
alkisg, does that make sense?
13:10
<alkisg>
Nope
13:10
<dcepticon>
are those values correct?
13:10
<alkisg>
append ro initrd=initrd.img quiet
13:10
put only that there, delete both nbd* entries
13:11
<dcepticon>
ok ill attempt that (thanks man)
13:11
<alkisg>
the nbdport=9572 is for swapping, don't use it for a root port
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13:14
<dcepticon>
alkisg, nope same thing. loads of output then it seems like it switches video modes (or like typing reset on the console) then goes to busybox
13:16
my /var/log/messages says May 18 11:37:16 ramadmin kernel: [83475.159201] nbd0: unknown partition table
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13:20
<dcepticon>
alkisg, i have [export]
13:20
exportname = /opt/ltsp/i386
13:20
port = 9572
13:20
<alkisg>
Where?
13:20
<dcepticon>
alkisg, in /etc/nbd-server/config
13:21
<alkisg>
Delete that file completely...
13:21
nbd-server runs from inetd
13:21
<dcepticon>
alkisg, but keep the user=nbd and group=nbd?
13:21
<alkisg>
dcepticon: what did you make all those changes?
13:21
Now you're just wasting hours to undo them
13:22
<dcepticon>
:P because it wasn't working
13:22
lol i know
13:23
damn same thing
13:23
<alkisg>
Erm, ok, maybe you should try to purge ltsp-server along with all of its dependencies, so that all config files are purged as well, and reinstall ltsp
13:24
(the image will be kept as it is)
13:24
<dcepticon>
only the ltsp server?
13:24
<alkisg>
You need to restart the nbd server after changes to the configuration files
13:24
<dcepticon>
did that
13:24
<alkisg>
how?
13:24
<dcepticon>
/etc/init.d/nbd-server restart
13:24
<alkisg>
Yup, that's the wrong way to do it
13:25
nbd-server runs from inetd
13:25
<dcepticon>
service nbd-server restart
13:25
<alkisg>
Nope
13:25
<dcepticon>
?
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13:25
<alkisg>
openbsd-inetd restart
13:25
<dcepticon>
mm how then?
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13:25
<dcepticon>
oohh right
13:25
kay lemme try that first
13:26
<alkisg>
Anyway it's getting messier and messier by the second, so allow me to return to work... :)
13:26
<dcepticon>
l8r thanks!
13:26
<alkisg>
Do try to revert any changes that you did...
13:28
<dcepticon>
ok thanks
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13:39
<reynolds>
anyone familiar with "glib-warning getpwuid_r failed" with login on one of my clients?
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13:49
<denisesball>
hey guys, is it normal when you enter an incorrect user/pass at ldm for ldm to say "no response from server, restarting" go black and show terminal sayin "glibc error unknown user id" and then restart?
13:49
seems like it should be a little more graceful and just give a "bad username/password" error at ldm
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14:03
<johnny>
denisesball, not much is gonna change for that until ldm is rewritten to use libssh
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14:24
<reynolds>
anyone familiar with the LTS.conf variable LDM_LOGIN_TIMEOUT
14:25
<johnny>
yes
14:25
i used to use it
14:26
<reynolds>
I would like to have the ability to have my clients auto login, but also have the option to change the user if I need to. Currently I have my clients logging in using LDM_USERNAME but cant get them to work together.
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14:29
<reynolds>
my client seems to be ignoring the auto login variable, when used in conjuction.
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14:34
<reynolds>
johnny do you know if I need to use it with LDM_AUTOLOGIN or just LDM_LOGIN_TIMEOUT with username and pass?
14:35
<johnny>
should just be the LOGIN_TIMEOUT
14:36
<vagrantc>
read the docs.
14:36
<reynolds>
when I do that I see the count down but It doesnt do anything once it reaches 0. If I include LDM_AUTOLOGIN it skipps countdown and loggs in
14:37
<vagrantc>
i think you need to specify LDM_GUESTLOGIN in order to use LDM_LOGIN_TIMEOUT
14:40
<reynolds>
vagrant thanks, that worked.
14:40
<rhodan>
There is a network with an existing DHCP server that does not respond to extended DHCP discovers. Can I set up a second DHCP server that *only* responds to those and doesn't get in the way?
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14:41
<alkisg>
What is an extended dhcp discover?
14:43
https://help.ubuntu.com/community/UbuntuLTSP/ProxyDHCP
14:44
<rhodan>
Yes, that's what I meant, thank you.
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14:47
<johnny>
oh there we go
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15:24
<rhodan>
Can Linux boot from NFS4?
15:29
<johnny>
linux can..
15:29
not sure about ltsp.. as i don't know much about what has changed
15:29
rhodan, but.. if you use ubuntu, you won't be using nfs anyways
15:29
or fedora as well i think
15:29
<rhodan>
I'm using Gentoo.
15:29
<johnny>
ah.. yes.. we can't support nbd on gentoo yet, because genkernel sucks
15:30
<rhodan>
I don't even have LTSP. I'm just asking here because it's similar.
15:30
<johnny>
waiting to see dracut stable
15:30
<rhodan>
genkernel?
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15:30
<rhodan>
I configure by hand.
15:30
<johnny>
sure.. but we use the initramfs from genkernel
15:30
you need an initramfs to neboot
15:30
<rhodan>
No.
15:30
The kernel can boot from NFS IIRC.
15:31
<johnny>
the kernel can load a rootfs yes
15:31
<rhodan>
What more does it need?
15:31
<johnny>
but if you don't compile everything into the kernel.. then you need to load the modules from initramfs before the rootfs is mounted
15:31
that's the method we support in gentoo's ltsp
15:32
<rhodan>
Oh, I see.
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15:32
<johnny>
i don't see why you would be able to boot in nfs3, but not 4
15:32
<rhodan>
I need to know which kernel options to use.
15:32
<johnny>
wrong channel
15:32
we don't hand configure kernels here
15:32
all the supported distros use the distro provided kernels
15:33
inccluding gentoo, .. altho we just build using the defaults of genkerenl
15:33
genkernel*
15:33
<rhodan>
No, I mean what do I tell grub.
15:33
<johnny>
we don't use grub either
15:33
we use pxelinux
15:33
and that option is usually different by distro, since it gets handled by the initramfs
15:34
<rhodan>
root=/dev/nfs nfsroot=192.168.1.1:/diskless/192.168.1.21
15:34
<johnny>
on gentoo it's something like nfsroot via the initramfs
15:34
<rhodan>
That gets handled by the kernel.
15:34
<johnny>
you're gonna have to go ask somehwere else.. if it's different than that, you should find out b people who actually use it
15:34
nobody here does
15:34
<rhodan>
OK.
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16:13
<vagrantc>
in-kernel NFSROOT support only supports NFSv3, as far as i know.
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16:13
<vagrantc>
it hasn't seen much development in 5 years, and linus has threatened to remove it from the kernel a few times
16:13
rhodan: ^^
16:14
<rhodan>
Why did he do that?
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16:18
<vagrantc>
maybe it wasn't linus...
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16:18
<vagrantc>
it's just old code that's largely better supported via initramfs
16:18
moving it to userspace
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16:49* Lns waves to all
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