> .Bl -ohang -compact
Try .Bl -tag -width "indent"here instead. That creates a list with
"tags" or headers, and the description indented by the width of the
word "indent".
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d to change
> peoples' passwords whenever they asked...
Not having #2 in your internal network is a big red X on security
audits, though. Netware did this right, where 3 (configureable)
consecutive bad logins sets an intruder lockout flag, that gets cleared
after 10 (configureable) minutes.
-
se two items will fold, and description
> will begin on the tag line. That's not what I want.
.br ( line break, just like html's ) should work:
.Bl -tag -width indent
.It Fl H
.br
Print a brief help message.
.El
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ot explain why on one box 'pwrite()' is called and on the other
> one 'write()', is this the first box has a newer build date? Or are
> there any other components that might have an effect on running linux
> binaries.
You need to install the devel/linux_kdump port a
require kernel
mods. It does mean that you need to start X up to capture video,
though.
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rely historic?
Performance.
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ou can just installworld in multiuser mode, and reboot
after it's done. The advise to install in single-user mode is just so
that people logged in while you install don't have problems due to
binaries getting installed before required libraries, etc.
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g like this? Ideally wait() has a
> timeout parameter, but, no such luck.
Just make sure your signal handler has the SA_RESTART flag unset
(either via siginterrupt() if the handler was installed with signal(),
or directly if the signal was installed with sigaction() ), and the
signal will inte
In the last episode (Mar 30), Sean Hamilton said:
> Dan Nelson wrote:
> | Just make sure your signal handler has the SA_RESTART flag unset
> | (either via siginterrupt() if the handler was installed with
> | signal(), or directly if the signal was installed with sigaction()
> | ),
only give you time
to the nearest second, and according to
http://www.eecis.udel.edu/~ntp/ntpfaq/NTP-s-refclk.htm#AEN4231 , the
DCF77 signal is accurate to ~3ms . Precompiled ntpd binaries for NT
are available at http://www.ntp.org/links.html
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D
the O_NONBLOCK flag of the file status flags is set.
If you cannot modify the clients, try changing your server to create a
Unix domain socket instead of a named pipe (the clients shouldn't see
any difference).
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cket (again...)
Take a look at syslogd; it creates a unix domain socket at
/var/run/log.
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d integer type with a
rank larger than the rank of signed long. The shell may use a
real-floating type instead of signed long as long as it does not
affect the results in cases where there is no overflow.
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You don't have to
specifically ask about a particular model.
I had no problems using DLT autoloaders on our FreBSD servers.
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ckers/2003-April/000592.html
It'd be easier if Linux would just follow the NFS spec, though.
http://lxr.linux.no/source/include/linux/lockd/xdr.h has the following
comment:
/*
* NLM cookies. Technically they can be 1K, Nobody uses over 8 bytes
* however.
*/
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directories, for example; there may not be a
way to store the correct position in a single "long" value without
using a cookie like FreeBSD does.
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default as it will
lower the throughput of individual TCP streams to prevent backlogs and
packet loss.
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e?
Unless you're doing multiple simultaneous TCP connections it'll only
slow you down. Your bw*delay product is 600/8*.220 = 165Kbytes, so
telling ncftp to set its so-bufsize to say 200K, and telling your ftp
daemon to do the same thing, should be all you need.
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unning commercial software
> able to push this link to 625KByte/s (5Mbit/s)
Perhaps it defaults to a larger window size? You can easily verify
this with tcpdump or ethereal.
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K bw*d product) even with
IDE disks. Latency and packetloss are the killers.
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use -L when creating a dump, do I need to restore it any
> differently, or can I restore it the same regardless of whether I used -L
> or not ?
Nope. All -L does is back up a snapshot instead of the (possibly
changing) live filesystem. The dump file format doesn't change.
--
# ktrace -p
> # kdump -l
Neat! I didn't know about -l. One thing truss/strace can do that
ktrace doesn't (can't?) is dereference pointers to print things like
select/poll arrays, stat structures, etc (see pr bin/52190, which is
waiting patiently for a committer).
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In the last episode (Jul 18), Alexey Neyman said:
> hi, there!
>
> On Wednesday 09 July 2003 00:30, Dan Nelson wrote:
> DN> > pos = telldir(dirp);
> DN> > ent = readdir(dirp);
> DN> > seekdir(dirp, pos);
> DN> > printf("First t
Mb/s barrier...
What I find fascinating is that Maxtor's site never actually tells you
the true throughput of that disk anywhere.
http://www.maxtor.com/en/products/ata/desktop/diamondmax_plus_9/
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om/tech/techlib.nsf/techdocs/966AE18147C20C8587256BF100656F41/$file/HGSTUltrastar146Z10.PDF
Also lists center/edge sustained speeds
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st 5 years. The slowest machine I have it a P6/200 with FreeBSD 4.1
and this disk:
ad0: 3067MB [6232/16/63] at ata0-master using WDMA2
, which does 7MB/sec raw, can feed a NFS client doing a file read at
5MB/sec.
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In the last episode (Aug 17), Pawel Jakub Dawidek said:
> On Sat, Aug 16, 2003 at 08:50:30PM -0500, Dan Nelson wrote:
> +> What kind of hardware were you using? 2.5MB/sec NFS sounds
> +> abysmal.
>
> I don't think it is a hardware problem.
>
> Run this test o
null
fd1 -> /dev/null fd2 -> stdout
2>&1
fd1 -> /dev/null fd2 -> /dev/null
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failure code, nothing else).
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ly write full blocks to raw devices. The first file is
84480/512 = 165 disk blocks on the dot. The second file is 164.8828125
blocks, and that last fragment is why the dd is failing. Try adding
conv=osync to your dd line to tell it to pad the
least should be the defaults.
Smart ports check to see whether the user has installed the optional
package. See ports/audio/alsaplayer/Makefile, for example. You're
welcome to submit PRs fixing the ports that hardcode unnecessary
dependencies :)
--
Of course. Most programs in the ports tree are standalone. 95% of the
programs in the base system are standalone.
> Before I thought that unix programs very compact, but they are huge!
Some are huge, some are small. There are a lot of Windows programs
that are huge too (MS Word,
wo to sustain
> the IO required?
To sustain only 30MByte/s across the entire set? Doesn't really
matter, since even a single disk could do that.
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In the last episode (Sep 02), Max Clark said:
[ quoting format manually recovered ]
> Dan Nelson wrote
> > Depends on whether you plan on crashing or not :) According to
> > http://lists.freebsd.org/pipermail/freebsd-fs/2003-July/000181.html,
> > you may not want to create
> leftover, or will the entire region be unmapped?
It simply rounds up to the nearest pagesize. If you map 1 byte, you
get a page. munmap does the same thing.
> And, should I be passing MAP_PRIVATE or MAP_SHARED to read-only mmaps? Does
> it make any difference at all?
I do
have an
EMC unit, let them know you'd like to attach a FreeBSD box (give them
exact hardware specs) and they'll certify it. It's in their best
interest to support their customers' systems :)
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to tcpcb
and hack all the netinet/tcp* code to update those whenever the global
tcpstat gets updated. You'll get all the info that netstat -s prints,
for each socket. *That* will definitely double the size of struct tcpcb :)
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rticular .so, eg. "mvld foo foo.so.1
> foo.so.2"?
Version numbers get bumped for a reason :) Running the wrong version
library will usually result in a coredump or runtime linking error.
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knowing such or having
> experience?
Lantronix's XPort product is definitely in your size range (embedded
management device built into an rj45 jack), but I don't believe you can
put just any OS on it, though. It runs on a custom 16-bit 80186 CPU.
http://www.lantronix.com/products/e
In the last episode (Oct 10), Bernd Walter said:
> buf.c_iflag |= IGNBRK;
> buf.c_cflag &= ~(CSIZE | PARODD);
> buf.c_cflag |= CS8 | CLOCAL | PARENB;
Do you maybe want CS7 here?
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; by OpenBSD could not be adapted to FreeBSD's VM system.
Probably just a case of "too much to do and not enough people to do
it". FreeBSD already has sys/tree.h, which provides the red-black tree
macros.
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unknown version of Linux, and you care having some unknown
problem.
We need details.
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roblem because it sends events too fast to clients
> so the CORBA event service fails.
When you called pcap_open_live, what timeout did you set?
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In the last episode (Oct 30), Isaac Gelado said:
> Dan Nelson escribiÃ:
> >In the last episode (Oct 29), Isaac Gelado said:
> >>This schema is working correctly in a linux machine, so when a
> >>packet is captured an CORBA event is sent to clients. But, when the
> >
ult amd rule says
proto=udp. Is there any reason to add the overhead of the TCP stack if
you're not leaving your own ethernet?
You should be able to easily saturate a 100mbit link with FreeBSD 4.*
machines, and I can do 15-20MB/sec with Netgear GA620 gigabit nics (SMP
2 x pIII/600).
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e file, causing
the snapshot file that the background fsck is using to grow and fill up
the filesystem. Unlikely, but possible if your disk is almost full
already.
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of work to me.
There are already kernel counters for most (probably all) of the things
sar would need to measure. The only problem is writing sar, sa1, sa2,
and sadc. If you don't mind the GPL, the Linux systat package includes
an implementation of sar. In 1999, SCO promised to release
real sar. SCO released the sources a year or two
> back, now.
Well, they published a press release saying they would, but the web
page referenced in the announcement never had any download links, and
is now 404.
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e latter,
you might want to try building different kernels to see if you can
pinpoint the commit that's causing your slowdown. You will only have
to rebuild the kernel, and a binary search should let you narrow it
down in under 2 hours, I'd say. I would have suggested looking at
Alfred'
nt on what you're building. icc will try and
use the Linux headers, so if you use FILE, or pretty much any system
struct, it's not going to run right. Actually, what might work is "icc
-X -I /usr/include", and then link with the freebsd ld. But icc
doesn't understand a
ILES" != "*" ] ; then
for i in $FILES ; do $HOME/scripts/test-freebsd-cvs.sh $i ; done
fi
done
it looks fine.
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http://www.freebsd.org/cgi/getmsg.cgi?fetch=393691+0+/usr/local/www/db/text/2000/freebsd-current/2507.freebsd-current
or, easier to read the entire thread:
http://groups.yahoo.com/group/freebsd-current/messages/39583?threaded=1
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ybe simply delay the fork() until the rate drops?
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on FAT, so you should be able to
boot straight into FreeBSD without using DOS (have grub load
/boot/loader which in turn loads the kernel).
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: read error from /dev/rda4s1e: Invalid argument: [block -1001057530]:
>count=1024
> [ ... ]
Dump should ideally be run on an unmounted filesystem. The next best
is to create a snapshot ( /usr/src/sys/ufs/ffs/README.snapshot ) and
dump that.
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So that any module loaded will automagically load modules it depends
> on to run ?
See the module(9) and MODULE_DEPEND(9) manpages.
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In the last episode (Feb 20), Cliff Sarginson said:
> On Tue, Feb 19, 2002 at 02:58:09PM -0600, Dan Nelson wrote:
> > In the last episode (Feb 19), Cliff Sarginson said:
> > > Hello,
> > > Someone suggested this may be the right list for this.
> > >
>
riginal poster is satisfied 8-)
Easier might be "pstat -t | grep 'tty[pqrsPQRS]' | wc -l"
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setting.
What's cache_mem currently set to, and how fast does squid's memory
usage grow?
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etely off base, though. You might want to check with the
people on the Squid mailing-list: [EMAIL PROTECTED]
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if
that vnode happened to be an important one (say for /), you may not be
able to kill the other process without rebooting.
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cumstances can a
> process hold a vnode lock and then be usurped for processor?
System calls aren't preempted, but if while processing a syscall, the
kernel decides to tsleep(), say because of disk I/O (a very common
thing when dealing with vnodes :), then another process is free to
star
anics or signal 11 coredumps are usually due to an excessively
overclocked CPU, or bad RAM. Try dropping your CPU speed 5%.
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t; }
>
> looks like what I want but I can't find a function which returns this
> data to a user land application. Is this possible? If so how?
Take a look at /usr/src/usr.sbin/vmstat.c. You'll want to use sysctl()
to pull the vm.vmmeter data block, which is of type "stru
to control audio features of a CD drive.
The device is a name such as cd0 or mcd0.
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haust your inode quota with 0-length
files.
I wonder if there is any reason to allow arbitrary hardlinking; maybe
only allow linking of files you currently have read access to? Only
files that you own? Only allow root to hardlink? How paranoid do you
want to be? :) It could always be ano
on the same partition as files he wants to keep
secure.
> I think a patch that disallowed it entirely would break
> /var/spool/lock based locking. 8-(.
But for UUCP locking, you're linking a tempfile that you just created
to the true lock name. You are linking from a file you own,
eads/writes the quota files directly!
> >
> > So, is quotactl just not supported or do the filesystems need to
> > be converted or what?
>
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on
all my 4.* systems (4.0 through 4.5) edquota calls quotactl and it
succeeds:
90883 edquota CALL quotactl(0x8057828,0x4,0x3e8,0x8057808)
90883 edquota NAMI "/usr"
90883 edquota RET quotactl 0
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g in.
Also make sure you're running ypbind-1.8 or higher on the Linux box.
Earlier versons have a very hard time staying bound to a server.
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in/w
$
uptime is actually w, and the source to w is in /usr/src/usr.bin/w .
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ts.
http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/contrib/dev/
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4k mbufs is probably too high, actually. The
tuning(7) manpage goes into a bit more detail.
If you are still having problems, try the -net mailinglist.
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xplicit:
BUGS
The nsdispatch routines are not thread safe. This will be
rectified in the future.
You'll have to serialize access to it yourself.
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part of a warmboot, you'll lose the
dmesg buffer. I've got docked laptops that don't seem to ever zero the
data, even on a power cycle.
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y by simply listing the dependencies
itself, so
> envuidgid: envuidgid.o
> $(CC) $(LDFLAGS) -o $@ $^
becomes
> $(CC) $(LDFLAGS) -o $@ envuidgid.o
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In the last episode (May 31), Jos Backus said:
> On Fri, May 31, 2002 at 11:46:03PM -0500, Dan Nelson wrote:
> > Automake avoids the issue entirely by simply listing the dependencies
> > itself, so
> >
> > > envuidgid: envuidgid.o
> > > $(C
.5 GB of memory, even
> > if I do it in
>
> Check your per-process limits.
>
> Also, rebuild your kernel after increasing MAXDSIZ: (from LINT)
You don't even need to rebuild the kernel. Just add
kern.maxdsiz=1073741824 to /etc/loader.conf and reboot (to raise the
limit
nformation i need?
man speaker
man spkrtest
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ry, only the
symlink is removed.
The old version was vulnerable to someone symlinking .X11-unix to, say,
/etc.
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the code activated by the
options are specialized bcopy routines accessed through an indirect
pointer, or initialization code used only once during bootup.
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oard). All are easily
scriptable for graphing purposes, healthd can be configured to run
scripts based on trigger settings.
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on the FreeBSD box. Run "cap_mkdb
/usr/share/misc/termcap" when you're done. That should make FreeBSD
use cygwin's updated termcap entries. If this fixes your problem, use
send-pr to file a FreeBSD bug on it. If it doesn't, file a bug with
cygwin, asking them to up
In the last episode (Jul 10), Chad David said:
> As a side note, the data being served will be attached to the samba server
> via NFS.
Wouldn't it be better to run samba directly on the server that's
providing the data? Why force it over the network twice?
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ocated on heap.
>
> So the following question comes to my mind: To stay portable to a
> reasonable degree, how large on-stack variables can be used?
I think most OSes default to an 8MB stack (at least a quick survey of
the ones here do). FreeBSD seems to default to 64MB.
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written data is flushed before the call returns.
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agine that the current fs is nearly full...
Don't you want to temp filename to be in exactly the same place as the
original file, so the rename() swap will work? If the current fs is
full, then sed -i will fail anyway.
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too.
Hmm. There isn't anything on alpha.gnu.org. Not even a /gnu directory
anymore.
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ourself, so you can't use them them in your
examples. If you were to try with the native Solaris cc, it would not
include /usr/local. Same for the bundled cc on Tru64. It's probably a
bug that BSD/OS didn't remove /usr/include when they imported gcc into
the base system.
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ference between pentiumpro and
the other options, either, though.
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om RAM instead of a
blocking disk read.
* Splitting your single perl program into multiple ones that hit the
database simultaneously. You might be seeing a synchronization
effect where your perl and mysql processes are competing for a SMP
lock or something and the wrong one always wins.
t;
ports/archivers/lha will extract them.
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ively. Since S_IFWHT is a filetype, you
would have to only allow file deletion, or encode the original filetype
somewhere else.
Alternatively, you could add a file flag equivalent to whiteout.
"invisible" or something, and use chflags to salvage.
--
Dan Nelson
[EMAIL PROT
In the last episode (Sep 25), Terry Lambert said:
> Dan Nelson wrote:
> > You might be able to misuse the Whiteout file type in FFS to
> > present a similar user interface. unlink(2) would rename the file
> > to filename.timestamp and whiteoute it. ls -W, rm -W, and rm wo
-- k
> -s arg2 --
> gabby#
You'll just have to catch that in your switch-processing code, and
print an error if you get an argument that starts with a dash.
case $i in
-s )
case $2 in
-* )
echo "getopt: option requires an argument -- $i" ; exit 1 ;;
to the disk. What you want is a shared-storage filesystem, and
there is no such thing for FreeBSD.
Considering you can get a gigabit ethernet NIC for under $50 and a
D-Link 4-port gigabit switch for $300, you might just want to plug the
RAID into BOX3, and have BOX1/2 NFS-mount it.
--
Dan N
reeBSD malloc uses anonymous pages mmap'ed off of /dev/zero.
>
> The Linux malloc uses pages added to the process address space via a
> call to sbrk.
Actually, on FreeBSD only the page directory is mmap'ed. Data returned
to the user is allocated via sbrk.
--
D
In the last episode (Oct 22), Terry Lambert said:
> Dan Nelson wrote:
> > > The FreeBSD malloc uses anonymous pages mmap'ed off of /dev/zero.
> > >
> > > The Linux malloc uses pages added to the process address space via a
> > > call to sbrk.
> >
bles, or you can have
your module register a dynamic sysctl variable that the user can tweak
after the module has been loaded. I've used the sysctl method myself
and it works fine.
--
Dan Nelson
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e,
.l.out should probably be using ${.PREFIX}.l.tmp.c, just so you can
tell which rule generated a particular tempfile.
--
Dan Nelson
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