<s>
Stand-alone	B-Application
shell	I-Application
(	O
sash	O
)	O
is	O
a	O
Unix	B-Application
shell	I-Application
designed	O
for	O
use	O
in	O
recovering	O
from	O
certain	O
types	O
of	O
system	O
failures	O
and	O
errors	O
.	O
</s>
<s>
The	O
built-in	O
commands	O
of	O
sash	O
have	O
all	O
libraries	B-Library
linked	I-Library
statically	I-Library
,	O
so	O
unlike	O
most	O
shells	O
on	O
Linux	B-Application
,	O
the	O
standard	O
UNIX	B-Application
commands	O
do	O
not	O
rely	O
on	O
external	O
libraries	O
.	O
</s>
<s>
For	O
example	O
,	O
the	O
copy	O
command	O
(	O
cp	B-Application
)	O
requires	O
libc.so	B-Language
and	O
ld-linux.so	B-Application
when	O
built	O
from	O
GNU	B-Application
Core	I-Application
Utilities	I-Application
on	O
Linux	B-Application
.	O
</s>
<s>
If	O
any	O
of	O
these	O
libraries	O
get	O
corrupted	O
,	O
the	O
coreutils	B-Application
cp	B-Application
command	O
would	O
not	O
work	O
;	O
however	O
,	O
in	O
sash	O
,	O
the	O
built-in	O
command	O
,	O
cp	B-Application
,	O
would	O
be	O
unaffected	O
.	O
</s>
<s>
In	O
earlier	O
times	O
,	O
most	O
critical	O
commands	O
(	O
including	O
shells	O
)	O
in	O
/sbin	O
or	O
even	O
/bin	O
were	O
statically	O
linked	O
for	O
this	O
purpose	O
,	O
whereas	O
in	O
/usr/sbin	O
and	O
/usr/bin	O
you	O
would	O
find	B-Application
the	O
more	O
feature-rich	O
versions	O
that	O
were	O
dynamically	O
linked	O
.	O
</s>
<s>
The	O
Sash	B-Application
shell	I-Application
has	O
also	O
been	O
ported	O
to	O
work	O
with	O
Android	B-Application
in	O
a	O
terminal-interface	B-Application
.	O
</s>
<s>
The	O
key	O
features	O
are	O
the	O
chroot	B-Application
,	O
pivot	B-Application
root	I-Application
,	O
and	O
losetup	B-Application
commands	O
.	O
</s>
<s>
These	O
functions	O
provide	O
interfaces	O
to	O
the	O
respective	O
Linux	B-Application
system	O
calls	O
.	O
</s>
<s>
They	O
are	O
especially	O
useful	O
when	O
sash	O
is	O
used	O
in	O
an	O
initial	B-Application
ramdisk	I-Application
(	O
"	O
initrd	B-Application
"	O
)	O
environment	O
.	O
</s>
<s>
Some	O
Linux	B-Application
distributions	O
,	O
such	O
as	O
Debian	O
and	O
Slackware	B-Application
(	O
via	O
SlackBuilds.org	O
)	O
,	O
have	O
this	O
available	O
.	O
</s>
