ovibox:~# apt-cache search nasm
intel2gas - A converter from NASM assembly language to GAS
nasm - General-purpose x86 assembler
nasm-mode - NASM mode for XEmacs
ovibox:~# apt-cache show nasm
Package: nasm
Priority: optional
Section: devel
Installed-Size: 2776
Maintainer: Christian Kesselheim <ckesselh@debian.org>
Architecture: i386
Version: 0.98.38-1.2
Depends: libc6 (>= 2.3.2.ds1-21)
Filename: pool/main/n/nasm/nasm_0.98.38-1.2_i386.deb
Size: 1546538
MD5sum: 16a471a88d9250cd9036310c389761c3
Description: General-purpose x86 assembler
 Netwide Assembler.  NASM will currently output flat-form binary files,
 a.out, COFF and ELF Unix object files, and Microsoft 16-bit DOS and
 Win32 object files.
 .
 Also included is NDISASM, a prototype x86 binary-file disassembler
 which uses the same instruction table as NASM.
 .
 NASM is released under the GNU Lesser General Public License (LGPL).

ovibox:~# apt-get install nasm
Reading Package Lists... Done
Building Dependency Tree... Done
The following NEW packages will be installed:
  nasm
0 upgraded, 1 newly installed, 0 to remove and 251 not upgraded.
Need to get 1547kB of archives.
After unpacking 2843kB of additional disk space will be used.
Get:1 http://ftp.ro.debian.org sid/main nasm 0.98.38-1.2 [1547kB]
0% [1 nasm 7239/1547kB 0%]
ovibox:~#