Fei Nan.com Blog

List Word Occurrence for A Given Document

feinan — Sat, 22 Mar 2008 02:16:57 +0000

2660 x
2659 user
2659 to
2659 signal
2659 log
2659 dumped
2659 due
2659 debug
1 milestones
1 begin
1
.

GNU Screen — MITBBS Linux

feinan — Mon, 18 Feb 2008 12:06:18 +0000

——=_1203336378_289654110.attach
Content-Type: text/plain

how do you list all users in linux

feinan — Thu, 24 Jan 2008 20:51:05 +0000

We’ll start by
1.cat /etc/passwd

2.As we all know that by default all the users created will have their
home directories in /home share
so we’ll modify our command a bit by using grep.
Now it’ll be
cat /etc/passwd | grep “/home”

3. Now we’ll get all the user accounts which have their home share in /home.
But the only output we need is the list of users & nothing else.

4. So we’ll modify our command again
cat /etc/passwd | grep “/home” |cut -d: -f1
Now what we have done is that we have piped the output of previous
command to another variable “cut”
What we have done here is we have added
cut -d: -f1
-d: means delimiter :
-f1 means display first field of line i.e. username.

So final command is
Cat /etc/passwd |grep “/home” |cut -d: -f1

This works until all your users have their home share in /home. If you
have defined their home share to some other destination. Modify the
above command.
.

Perl String Output Tricks

feinan — Tue, 27 Nov 2007 20:42:55 +0000

echo -n ‘abc.efgh.ijk.lmn’ | perl -ne ‘{while (/([a-z]+)\.([a-z]+)(.*)/) {
print “$1.$2\n“; $_ = $2.$3;}}‘

Shortest passwordless ssh tutorial

feinan — Thu, 01 Nov 2007 04:05:22 +0000

Shortest passwordless ssh tutorial

Counting bits set

feinan — Sun, 07 Oct 2007 10:13:03 +0000

This is the most elegant way of counting bits set in an unsigned integer.

unsigned int in_integer;
unsigned int num_bits;
for (num_bits = 0; in_integer; num_bits++)
{
in_integer &= in_integer - 1;
}

mp3 playback

feinan — Sun, 07 Oct 2007 09:03:18 +0000

integrating Plogger in Wordpress

feinan — Sun, 07 Oct 2007 02:45:38 +0000

Integrating Plogger
Integrating Plogger into WordPress

Call for Papers, Data Compression Conference March 2008, Snowbird, UT

feinan — Sat, 06 Oct 2007 19:59:54 +0000

***** Data Compression Conference (DCC’2008) *****

Snowbird, Utah

Tues, March 25 - Thurs March 27, 2008

The CALL FOR PAPERS is posted at:
www.cs.brandeis.edu/~dcc

DCC is held at the Cliff Lodge convention center in the beautiful
Snowbird / Alta Ski areas; located a short ride from the Salt
Lake City International Airport.

It is an international forum for current work on data compression
and related applications. The conference addresses not only
compression methods for specific types of data (text, images,
video, audio, medical, scientific, space, graphics, web content,
etc.), but also the use of techniques from information theory and
data compression in networking, communications, and storage
applications involving large data sets (including image and
information mining, retrieval, archiving, backup, communications,
and HCI). Both theoretical and experimental work are of interest.

book list

feinan — Sat, 06 Oct 2007 08:36:59 +0000

———- Forwarded message ———-
From: W M
Date: May 4, 2007 11:29 PM
Subject: book list
To: Fei Nan

honey,

here is the list:

Downtown Lib:

HB31.C69 no. 6
HA33.M33

Math Lib (Armstrong Bldg):
QA280.A5
QA280.H35
QA276.H32

Thanks. Kiss.