►
From YouTube: Red Hat Enterprise Linux Presents (E17): Troubleshooting
Description
A show that features the people and technology that make Red Hat® Enterprise Linux® into the world’s leading enterprise Linux platform.
A
Good
morning,
good
afternoon,
good
evening,
wherever
you're
hearing
from
welcome
to
another
red
hat
enterprise
linux
presents,
I
am
chris
short
host
showrunner
and
you
know
producer
extraordinaire.
For
this
thing
we
call
red
hat,
live
streaming,
I'm
joined
by
the
one
and
only
scott
mcbryan
who,
if
you've
been
watching
today,
you
saw
earlier
on
the
level
up
hour.
C
B
B
A
B
B
A
B
Network
it,
but
I
mean
to
be
fair,
like
from
their
perspective,
if
they
are
a
layperson,
think
things
no
worky
yeah,
so
so
the
first
thing
is
like
well
how
how
bad
is
it
right?
So
the
first
thing
I
would
check
is
probably
like:
does
this
machine
have
an
ip
address
right
right,
so
maybe
we
still
get
something
like
an
ipa.
A
A
B
Well
then,
it's
like
well.
Can
we
ping
beyond
the
next
thing
up
right,
all
right,
so
pain
like
that
yeah?
Okay?
So
at
this
point
we've
determined
that,
contrary
to
popular
belief,
the
internet
is
not
down
right
but
clearly
there's
something
wrong,
because
when
we
were
trying
to
use
machines
they
were
reporting
back
as
not
responsive
right.
B
A
B
A
C
C
B
B
C
B
B
C
B
B
C
A
B
What
will
happen?
It's
like
it's
going,
it's
going
and
it
just
stops
and
waits
because
it's
waiting
for
that
timeout
from
the
dns
lookup
and
then
it
finishes,
and
so,
if
you
like,
read
back
from
that
pause,
you
can
see
the
the
library
that
it's
calling,
which
is
a
get
host
by
name
or
something
like
that,
and
it's
like,
oh
okay,
so
I've
confirmed
this
is
really
like,
probably
doing
dns
records
or
dns
lookups
all
right.
So
where
do
we
start
going
from
here?
Well,
one
place
we
could
go.
B
B
B
B
A
B
So
this
is
a
top-level
dns
server
out
of
the
world.
In
reality,
you'd
probably
want
to
choose
one
that
is
within
your
network
and
then
that
way
you
can
rely
on
things
like
dns
caching
and
not
doing
a
whole
bunch
of
dns
lookups
at
the
root
system
servers
on
the
network,
but
yeah
we
are
what
we
are
all
right.
B
A
B
B
B
A
B
A
Right
so
let's
say
our
domain
name
server
changed,
but
we
didn't
pick
that
up
in
time
and
now
we're
having
dns
issues
and
our
dns
is
actually
configured
correctly
or
so
we
think
so
now
we
need
to
refresh
this
command
or
refresh
run
the
command
to
refresh
the
dhcp
lease
so
that
you
can
get
whatever
change
came
down.
The
pipe
yeah.
B
B
Of
places
will
like
do
a
check-in
time
once
a
day,
or
maybe
once
every
couple
days
and
a
renewal
of
a
day
or
every
couple
of
days,
if
you're
in
a
network
that
has
a
lot
of
transient
guests
like
an
office
with
a
lot
of
guest
workers,
for
example,
there.
You
would
turn
those
values
down,
because
you're
not
expecting
someone
to
be
there
for
multiple
days
on
end
right.
So
you
might
have
them
refresh
every
couple
of
hours
so
that
you
can
return
that
used
lease
back
into
the
pool
of
available
leases.
B
A
A
So
remove
stale
pid
file.
All
that
actually
means
is
that
the
pid
file
that
had
all
the
information
that
dhcp
gave
it
that
was
created
by
dhclient
has
been
erased.
So
now
it
has
no
recollection
of
what
is
going
on
in
the
world.
So
now
you
do
a
dh
client
to
get
a
new
lease,
or
at
least
check
in
with
the
dhcp
server
to
see
if
a
new
lease
is
available.
B
B
A
Store,
my
shirt
is
school's,
tough
store,
which
you
can
get
for
yourself,
go
to
coolstuff.redhat.com
and
you
can
get
a
containers
or
linux
shirt,
all
your
very
own,
as
well
as
many
other
shirts
that
I
wear
throughout
the
week
as
as
I've
told
my
boss
many
times,
I
don't
think
you
understand.
I
can't
have
enough
redhead
shirts
that
upper
limit
needs
to
be
really
really
high.
A
Yeah
I
mean
yeah,
I
would
you
know
if
I
threw
on,
I
threw
on
a
college
shirt
one
time
and
people
thought
I
was
interviewing
and
it
was
actually
a
red
hat,
colored
shirt
at
that.
So
it's
like
okay
t-shirts
for
the
live
stream
got
it
got
it.
I
think
there
was
one
time
where
I
was
like
going
to
a
nephew's
birthday
party
like
right
after
a
stream-
and
I
was
in
apollo-
and
it
looked
weird
but
anyways
what
do
we
want
to
break
next?
All.
B
A
A
A
lot
of
people
don't
realize
is
there's
potentially
craft
on
your
boxes,
because
you
know
you
installed
a
group
that
you
didn't
intend
to
my
favorite
is
I
used
to
work
at
this
place,
a
very
well-known
place,
but
manufacturing
right,
so
it
was
an
old
bsd
admin
that
was
in
charge.
He
was
actually
a
contractor
that
was
in
charge
of
all
the
linux
boxes,
so
a
lot
of
tickle,
but
also
he
didn't.
A
You
know
he
was
not
real
certified
in
any
way
shape
or
form
and
didn't
completely
understand
that
small
images
are
good
images
right.
So
by
default
they
did
a
full
install
of
everything
on
the
rel
dvd
everything
full
install.
So
the
boxes
were
huge.
They
were
taking
up
enormous
amounts
of
space,
tons
of
updates,
tons
of
vulnerabilities.
Being
you
know,
tons
of
ports
open
that
don't
need
to
be
just
all
kinds
of
things
that
made
these
systems
very,
very
crafty,
so
I
had
to
go
in
and
clean
that
up.
A
Yeah
and
to
be
clear,
like
some
of
these
boxes
were
like
they
were
at
his
desk
one
day
and
then
they
were
in.
You
know
the
manufacturing
floor
never
to
be
touched
again
unless
something
needed
to
be
touched
kind
of
deal
so
yeah,
that's
what
that
was
their
thing
and
exactly
just
install
everything,
because
we
don't
know
what's
going
to
happen
here.
A
B
A
B
A
A
A
B
A
B
A
A
B
A
If
you
can
do
a
minimal,
install
and
then
add
your
packages
through
ansible
or
any
kind
of
administration
tool
or
automation
tool,
that's
kind
of
the
goal,
so
a
minimal,
install
server
with
gui
is
like
the
polar
opposite
of
each
other,
and
it's
funny
that
they're
installed
together
here
so
yeah,
let's,
let's
get
rid
of
server
with
googie
and
that's
gonna.
Take
one
command,
so
yum
group
remove
it's
in
quotes
server
with
gui
and
you
can
put
a
y
f.
That's
why,
after
that,
if
you
want,
you
know.
A
B
C
B
A
B
B
It
is
and
what
it's
done,
I'm
going
to
show
you
the
one
other
thing
that
we
can
do:
that's
unique
to
this
box,
because
if
we
installed
it
from
kickstart
with
server
with
gui
or
we
installed
it
from
the
installer
server
with
gui,
this
would
be
the
way
that
we
need
to
to
clean
that
back
off.
But
I
didn't
install
it
that
way.
I
actually
applied
that
after
the
fact.
B
C
C
A
B
B
B
A
B
B
A
B
B
C
B
C
B
B
B
A
B
B
B
So,
just
to
kind
of
see,
what's
going
on,
I
like
using
df,
so
yeah
we've
got
the
20
20k
available
on
this
35
gig
file
system.
Oh,
it's
not
it's
not
bad
at
all!
No,
but
we
need
to
like
figure
out
what's
making
our
file
system
full
right
right
now.
We
already
know
that,
because
we
watched
it
happen
right.
A
Is
there
anything
we
can
do
to
fix
it
from
becoming
full
routinely,
because
normally
what
happens
is
it's
like
some
batch
job
or
some
process
that
constantly
runs
that
ends
up
filling
up
your
disk
a
lot
of
times?
It's
done
by
mistake
right,
like
if
you're
testing,
a
bash
grip
or
trying
to
figure
out
you
know
all
the
files
on
a
file
system,
and
you
use
up
all
the
inodes
accidentally
right,
like
yeah.
B
A
C
A
B
B
A
B
That's
not
a
lot,
oh,
but
you
know
why.
That
is
because
it
is
an
xfs
file
system
and
xfs
file
systems
will
actually
make
more
inodes
as
they
need
them.
So,
unlike
ext
four
or
three
file
systems,
where
you
got
a
finite
amount
of
them,
where
you
created
the
file
system,
xfs
will
actually
figure
this
out
and
live.
Make
new
ones
before
you
run
out.
A
A
B
B
A
B
A
A
A
B
But
if
you're
like
out
there
touching
a
storage
array
out
on
the
network,
that's
probably
a
bad
look.
Yeah
yeah,
so
constrain
things
to
make
it
more
simple
and
easier
and
like
a
slash,
is
going
to
include
all
those
mounted
file
systems,
including
ones
that
might
be
elsewhere.
Like
your
santa
ray
right.
C
A
B
B
B
A
B
B
B
C
A
B
B
B
So
the
hang
up
signal
will
cause
it
to
refresh
all
of
its
files
generally
so
it'll
close,
all
the
two
files
and
then
reopen
them
all
and
when
it
closes
all
of
its
open
files,
then
that
would
release
the
file
that
we
had
deleted
and
there
you
go
a
lot
of
times.
The
reason
that's
happened
is
we've
done
something
like
using
log
rotate
to
rotate
a
log
file
to
an
older
file
for
archiving,
but
we
didn't
kill
the
process.
That's
writing
to
that
older
file.
B
A
A
B
B
B
B
B
Yeah,
actually
only
will
trade,
that's
right,
yes,
okay,
so
what
I
did
was
I
changed
the
the
policy
that
we
were
using
for
se
linux,
to
a
string.
That
is
not
a
recognized
policy.
That's
installed
on
the
box,
so
we're
running
in
targeted
policy
mode,
meaning
using
a
targeted
policy
and
now
we're
using
a
type
called
I'm
so
broken
is
not
actually
a
policy
name
all
right.
B
B
B
B
B
A
A
B
B
But
I
want
to
go
to
advice
to
inventory,
because
I
want
to
look
at
this
one
box
that
I'm
working
on
and
that's
this
box
that
registered
two
minutes
ago,
all
right.
So
at
this
box
level
I
can
actually
see
individual
stuff
for
it
like
what
cves
are
outstanding
for
this
box.
That
I
should
download
and
apply,
which
is
it's
normal
box
has
never
been
updated.
We
probably
need
to
do
that,
but
also
under
the
advisor
advice
so
right
there.
B
It's
an
important
advisor
advice
system
will
fill
the
boot
when
sc
linux
type
is
set
improperly,
and
then
it
actually
includes
the
actual
value
from
the
box.
That's
kind
of
nice,
so
I
can
find
it
and
then
the
steps
to
resolve
it
tells
me
like
what
we
think
it
should
be
set
to
which
may
not
be
true
for
your
environment.
C
C
B
B
B
B
A
B
B
You
can
verify
it
here
that
it's
done
and
then
there's
more
stuff
too,
like
compliance,
if
you're
actually
trying
to
comply
with
some
of
the
security
standards
that
red
hat
ships
like
disastig
or
cis
or
it's
another
one
hipaa,
you
can
age
your
compliance
against
those
security
standards
using
this
tool
as
in
addition
to
the
openscap
client-side
utilities,
but
this
will
give
you
like
a
nice
dashboard
of
your
population
against
those
compliances
all
right
cool.
So
I
noticed
that
kilogen
kellengin
asked
if
he
could
also
use
those
credentials.
C
B
But
if
you're
actually
looking
for
something
more
than
just
trying
the
lab
I've
already
written-
and
you
want
to
have
your
own
access
to
red
hat
enterprise-
linux
stuff-
you
might
try
the
red
hat
developer
subscription
for
individuals
and
that'll,
give
you
up
to
16
red
hat
enterprise,
linux
entitlements,
plus
insights,
because
it
comes
with
every
red
hat
enterprise.
Linux
entitlement
and
you
can
have
your
own
account
with
your
own
credentials.
A
A
A
What
could
possibly
go
wrong?
Yeah
all
right
so
last
show
of
the
day
folks,
but
tomorrow
come
back
for
some
awesome
beta
service
office
hour,
as
well
as
in
the
clouds
devnation
devsecops
is
the
way
and
getups
guide
to
the
galaxy
so
another
full
day
on
tap
for
us
on
a
thursday,
so
stay
safe
out
there
and
we'll
see
you.